Emergency Medicine Billing Services
Every emergency visit produces two claims, and we work one of them. The emergency physician group bills the professional claim — the visit level, the critical care time and the procedures performed during the encounter. The hospital bills its own facility claim for the same patient, and several of the charges ED groups worry about most live only there: the hourly observation charges, the trauma-response charge, the facility fee itself. Medicare's own fee schedule file marks those as non-physician services and pays nothing for them on a professional claim, so sorting which claim a dollar belongs on is the first thing we do — a group measuring itself against the hospital's numbers concludes it is under-billing when the money was never on its claim to begin with. On the professional side the work concentrates in three places. The visit level is now decided entirely by medical decision-making — the problems addressed, the data reviewed, the risk carried — with no time-based alternative anywhere in the ED family, so a group still documenting to the retired history-and-exam framework loses the level in the note rather than in the coding. Critical care has its own arithmetic: the minutes must be stated net of anything billed as a separate procedure, and where the record cannot carry the threshold after that subtraction the honest claim is a high-level ED visit, not a defended critical care line. And because an ED encounter contains a procedure by definition, the separately-identifiable-service modifier is attached at rates no office practice sees, which is where the commercial denial volume sits. That is the work we take on. We sample notes against the three decision-making elements and report the gap by element instead of circulating a target distribution, because the correction has to land on the note. We keep the procedure-time exclusion in the critical care template for every payer, read each plan's current modifier policy rather than one from memory, and review every same-encounter visit-plus-procedure claim before release. We map the charge file to the current inpatient-or-observation code set — the separate observation codes were deleted in 2023 and a surprising number of charge masters still emit them — and strip facility-only codes off professional claims. We reconcile every coded encounter back to the department's own visit log, so an unbilled visit surfaces as a named patient and a date, then work each claim through to a posted payment, a denial with a reason, or an appeal, never to a submitted status. Written for hospital-based, independent and freestanding emergency groups, and for pediatric emergency subspecialty practices.
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What does emergency medicine billing cover?
We bill the emergency physician group's professional claim: visit leveling, critical care time, the procedural overlay and the A/R behind them. Two things decide most of the revenue. The first is the level — since the CPT 2023 revision the ED codes are scored on medical decision-making alone, with no time alternative, so the level stands or falls on what the note records about problems, data and risk. We sample notes against those three elements and report the gap by element rather than handing physicians a target distribution. The second is the same-encounter procedure: an ED visit contains one by definition, so the note has to show an evaluation that was separately identifiable rather than the work-up leading to that procedure, and we review those claims before release. Observation, trauma activation and the facility fee sit on the hospital's claim, not yours — Medicare's relative value file, checked 17 September 2026, assigns them no physician fee schedule amount — and we say so before you measure your collections against a number that was never going to land on your remittance.
- ED E/M levels scored on the three medical-decision-making elements, two of which must reach a level to carry it, with no time-based alternative anywhere in the ED family
- Modifier 25 documented as a separately identifiable evaluation — history and exam addressing conditions beyond the procedural complaint, with the procedure note kept as its own section
- Critical care minutes recorded apart from separately reportable procedure time and the supported vital organ system named, which is the Medicare Claims Processing Manual's own requirement rather than one payer's
- Observation billed on the current hospital inpatient or observation family, because CPT deleted 99217–99220 and 99224–99226 on 1 January 2023
- Free ED billing review before you switch — we tell you what we would change and why
Who This Page Is For
Common Billing Friction in Emergency Medicine
MDM leveling on 99281–99285, and why a target distribution is the wrong fix
The CPT 2023 revision rebuilt the ED codes around a three-element medical decision-making grid: number and complexity of problems addressed, amount and complexity of data reviewed, and risk of complications or morbidity from management. Two of the three must reach a level for that level to be billable. The mapping is worth stating plainly because it is commonly written down wrong: 99282 is straightforward MDM, 99283 low, 99284 moderate and 99285 high, while 99281 describes a visit that may not require the presence of a physician or other qualified health care professional and carries no MDM requirement. Time is not a descriptive component at any level. The usual response to suspected under-coding is to circulate a target distribution, and we do not do that. A target tells a physician what number to hit; a documentation review tells you which notes already support a higher level and which do not. We sample notes against the three elements and report the gap by element — problems not enumerated, data reviewed but not attributed, risk implied by the disposition but never stated — so the fix lands on the note rather than on the code.
Critical care time and the separately reportable procedure exclusion
CPT 99291 covers the first 30 to 74 minutes of critical care on a date; 99292 covers each additional 30 minutes, and 99291 is reported only once per date even when the time is not continuous. The exclusion that costs groups money is not a payer quirk. The Medicare Claims Processing Manual, chapter 12, section 30.6.12, adopts CPT's bundled-services list — interpretation of cardiac output measurements, chest X-rays, pulse oximetry, blood gases, collection and interpretation of physiologic data, gastric intubation, temporary transcutaneous pacing, ventilator management and vascular access procedures are inside critical care and not separately billable — and states that time spent performing separately reportable procedures is reported separately and must not be included in the critical care time. Central line placement, intubation, chest tube and CPR are therefore billed on their own codes and their minutes come out of the critical care total. The documentation has to state the critical care minutes net of that procedure time and identify the vital organ system being supported. Where the record cannot carry the 30-minute threshold after the subtraction, the correct claim is a high-level ED E/M, not a defended 99291.
Modifier 25 audit exposure on E/M-plus-procedure same-encounter billing
ED encounters generate modifier 25 more often than any office setting, because a procedure is performed in the same visit by definition. The modifier unbundles the E/M only when the evaluation was significant and separately identifiable from the procedure, and the pattern that survives review is consistent across payers: history and exam findings address conditions beyond the procedural complaint, the MDM addresses complexity beyond the procedure itself, and the procedure note exists as its own separately documented section. Commercial plans publish their own modifier 25 reimbursement policies and revise them without notice, so we read the plan's current policy rather than assume one. Medicare's rule has a related use worth knowing: under chapter 12, section 30.6.12.6 of the Claims Processing Manual, a separate E/M on the same calendar date as critical care is payable with modifier 25 only when the record shows it was furnished before the critical care, at a time when the patient did not require it, and carried no duplicative elements.
Observation after 2023: the separate observation codes no longer exist
This is the single most common stale reference on ED billing pages, including the earlier version of this one. Effective 1 January 2023 CPT deleted the hospital observation E/M codes 99217–99220 and the subsequent observation codes 99224–99226, and hospital inpatient and observation care are now reported on one merged family: 99221–99223 initial, 99231–99233 subsequent, 99238 and 99239 for discharge day management, and 99234–99236 when admission and discharge fall on the same calendar date. CMS restates this in chapter 12, section 30.6.8 of the Claims Processing Manual and applies a stay test to the same-date codes: under 8 hours, report initial hospital inpatient or observation care only and do not report a discharge code; 8 hours or more with discharge on the same calendar date, report 99234–99236. Medicare's two-midnight rule at 42 CFR 412.3(d) sits alongside this but answers a different question — it governs whether the stay is appropriate for payment under Part A, which is the hospital's claim, and since the 2023 merge the physician's code family is the same either way. The hourly observation codes G0378 and G0379 are the hospital's, not the group's.
Where EMTALA actually binds, and what it leaves on the group's books
EMTALA is often described on billing pages as a rule the physician group operates under. The regulation at 42 CFR 489.24(a)(1) places the duty on the hospital: where an individual comes to the emergency department, whether or not eligible for Medicare and regardless of ability to pay, the hospital must provide an appropriate medical screening examination within the capability of its emergency department to determine whether an emergency medical condition exists, and must not discriminate on the basis of source of payment or ability to pay. That matters commercially because it fixes where the uncompensated care lands. The hospital's unreimbursed cost flows through its own Medicare cost report; the emergency physician group's unpaid professional claims do not. The group's self-pay balances are its own receivable and its own write-off decision, which is why we bill them, run them through financial-assistance screening and route them to a documented write-off rather than suppressing the charge at registration — a suppressed charge is invisible to every later reconciliation.
Emergency Medicine-Specific Payer Issues We Watch For
Medicare
Issue: MDM-based ED E/M leveling with no time alternative. A narrative that does not address problems, data and risk as separate elements supports a lower level than the case warranted, and the shortfall is invisible on the claim.
Our approach: ED note templates structured around the three MDM elements, with sampled documentation review reported by element rather than against a distribution target, so the correction lands on the note.
BCBS
Issue: Critical care handling varies by BCBS plan, and the plans publish their own policies rather than inheriting one. Some require an explicit statement that documented time excludes separately reportable procedure minutes; some adjudicate critical care against a same-day high-level ED E/M.
Our approach: We read the specific plan's current critical care policy during eligibility rather than assuming a BCBS house rule, and build the claim to it. The procedure-time exclusion goes in the note for every payer, because it is CPT's and Medicare's requirement independently of any plan.
UnitedHealthcare
Issue: Same-day E/M-with-procedure denials where modifier 25 is applied. UnitedHealthcare publishes and revises its own modifier 25 reimbursement policy, and the denials follow whatever that policy currently says about separately identifiable documentation.
Our approach: We check the policy as published rather than from memory, coach the documentation language that establishes a separately identifiable evaluation, and review every modifier 25 claim before release.
Aetna
Issue: Observation and ED E/M billed for the same encounter draw bundling edits. Since the 2023 code merge, the risk is usually a stale charge master still emitting deleted observation codes, or a professional claim carrying the hospital's G0378/G0379.
Our approach: We map the group's charge file to the current hospital inpatient or observation family, strip facility-only codes from professional claims, and appeal bundling denials against the plan's own published policy rather than absorbing them. The hourly observation codes G0378 and G0379 and the trauma-response code G0390 all carry status indicator X in the CY2026 Medicare physician fee schedule relative value file (checked 17 September 2026), meaning CMS does not treat them as physician services and pays no physician fee schedule amount for them on a professional claim.
What We Handle
99281–99285 MDM-based E/M coding under the CPT 2023 rules
Level selection scored against the three MDM elements, with documentation review reported by element rather than against a target distribution. ED note templates restructured to prompt for problems, data and risk at the point of dictation, and 99281 reserved for the visit the code actually describes.
Critical care time billing on 99291 and 99292
Time documentation reviewed net of separately reportable procedure minutes, with the supported vital organ system named and the high-complexity decision-making stated. The exclusion is the Medicare Claims Processing Manual's, so the attestation language goes into the critical care template for every payer, not one.
ED procedural coding (12001–13153 wound repair, 31500, 36556, 32551, 92950)
Wound repair by region, depth and closure complexity across the simple, intermediate and complex families, emergency intubation, central venous catheter placement, tube thoracostomy and CPR, each coordinated with the same-encounter E/M so the modifier and the note agree.
Observation on the merged inpatient or observation family (99221–99223, 99231–99233, 99234–99236, 99238–99239)
Initial, subsequent, same-date and discharge coding on the code set that replaced 99217–99220 and 99224–99226 in 2023, with the 8-hour test applied before a same-date code goes out. G0378 and G0379 are flagged as the hospital's codes when they appear in a group's charge file by mistake.
Shared and split visit billing under the CY2024 substantive-portion rule
For services on or after 1 January 2024 the substantive portion of a split or shared E/M is more than half the combined time or a substantive part of the medical decision-making; for critical care it remains more than half the combined time only. We document which practitioner met it before the claim is built. Trauma activation itself is the hospital's G0390 charge; the physician's claim is 99291 when the critical care criteria and minutes are met on their own.
ED log-to-charge reconciliation, missing-chart recovery and payer follow-up
Every coded encounter is reconciled back to the department's own visit log, so an unbilled visit surfaces as a named patient and date rather than as a soft revenue variance. Charts that are open, unsigned or missing an attestation are worked as a queue with the physician named and the age shown, and claims are followed to a posted payment, a denial with a reason, or an appeal — not to a submitted status.
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Key Emergency Medicine CPT Codes
| CPT Code | Description | Medicare Amount CY2026 national, non-facility |
|---|---|---|
| 99281 | ED visit that may not require the presence of a physician or other QHP | $11 |
| 99282 | ED visit, straightforward MDM | $40 |
| 99283 | ED visit, low-level MDM | $69 |
| 99284 | ED visit, moderate-level MDM | $118 |
| 99285 | ED visit, high-level MDM | $171 |
| 99291 | Critical care, first 30–74 minutes (facility amount $199) | $309 |
| 12001 | Simple repair, superficial wound of scalp/neck/axillae/genitalia/trunk/extremities, 2.5 cm or less (facility amount $44) | $114 |
| 31500 | Intubation, endotracheal, emergency | $133 |
Amounts are the Medicare national unadjusted non-facility amounts for CY2026, computed from the published CMS relative value file. They are not what a commercial payer pays, and your locality adjustment moves them. A dash means Medicare publishes no amount for that code — because it is non-covered, bundled, or priced outside the fee schedule.
Why General Billing Teams Miss Emergency Medicine Issues
General billing staff handle dozens of specialties and rarely develop the depth needed for emergency medicine coding nuances. Here is what gets missed.
Modifier and bundling errors
Specialty-specific modifier rules and CCI edits are frequently overlooked by teams that do not work exclusively in emergency medicine.
Under-coding high-complexity visits
Emergency Medicine encounters often qualify for higher-level E/M codes, but generalist billers default to mid-level codes to avoid audit risk.
Missed payer-specific rules
Each payer has unique coverage and documentation requirements for emergency medicine procedures that general teams rarely memorize.
Slow denial turnaround
Without specialty knowledge, appeal letters lack the clinical specificity needed to overturn emergency medicine denials quickly.
“The 2023 E/M revision moved ED leveling entirely onto medical decision-making, and the groups still losing money to it are not coding wrong — they are documenting to a framework the code set retired. Two other things follow from that same revision and get missed for years: the observation codes are gone, and 99281 is not a low-acuity visit, it is a visit that may not need a physician at all. The fix is documentation, not a coding target.”
MedPrecision Billing Team
Emergency Medicine Coding Specialist
Transition Plan
Switching billing partners should not disrupt patient care or cash flow. Our transition plan is designed for zero downtime.
Discovery and Specialty Audit
We review your current emergency medicine billing workflows, denial patterns, and payer mix to build a tailored onboarding plan.
System Integration
We connect to your EHR and practice management system, configure specialty-specific code sets, and validate charge capture workflows.
Parallel Billing Period
We run billing in parallel with your current process for 2-4 weeks to verify accuracy before taking over completely.
Full Transition and Reporting
Once validated, we assume full billing responsibility with monthly reporting dashboards and a dedicated account manager.
Emergency Medicine Billing Terms
- ED E/M Levels (99281-99285)
- Five-level emergency department evaluation and management code set. 99282 through 99285 are selected on medical decision-making complexity — straightforward, low, moderate, high — while 99281 describes a visit that may not require the presence of a physician or other qualified health care professional. Time is not a descriptive component at any level.
- Medical Decision Making (MDM)
- Composite of three elements: number/complexity of problems addressed, amount/complexity of data reviewed, risk of complications/morbidity from management. Two of three must reach a level for that level to be supported.
- Critical Care (99291)
- First 30-74 minutes of critical care service. Requires high probability of imminent deterioration and high-complexity decision-making for vital organ support. 99292 covers each additional 30 minutes.
- Hospital Inpatient or Observation Care
- The merged E/M family that has covered both inpatient and observation status since 1 January 2023: 99221–99223 initial, 99231–99233 subsequent, 99234–99236 same-date admission and discharge, 99238 and 99239 discharge day management. It replaced the deleted observation codes 99217–99220 and 99224–99226.
- EMTALA
- Emergency Medical Treatment and Labor Act. Under 42 CFR 489.24 the duty falls on the hospital: an individual who comes to the emergency department must receive an appropriate medical screening examination regardless of ability to pay, and screening must not turn on source of payment. The physician group bills its own professional claim; uncompensated professional balances stay on the group's books, not the hospital's cost report.
- Modifier 25
- Indicates a significant, separately identifiable E/M service performed on the same day as a procedure. High-frequency in ED billing due to E/M-plus-procedure visit pattern.
Last updated: 2026-09-17
Common Questions
Common questions about emergency medicine billing services.
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Request ReviewHow is ED E/M level determined under the 2023 rules?
Levels 99282 through 99285 are selected on medical decision-making: the number and complexity of problems addressed, the amount and complexity of data reviewed and analyzed, and the risk of complications, morbidity or mortality from management. Two of those three elements must reach a level to support it. 99281 is different — it describes a visit that may not require the presence of a physician or other qualified health care professional and has no MDM requirement. Time is not a descriptive component of any ED level, because emergency services are furnished at variable intensity across several patients at once (CPT E/M code and guideline changes, effective 1 January 2023).
When can critical care time (99291) be billed?
Critical care requires the direct delivery of care to a critically ill or injured patient with acute impairment of one or more vital organ systems and a probability of imminent or life-threatening deterioration, high-complexity decision-making, and at least 30 minutes of that care on the date. The first 30 to 74 minutes is 99291, reported once per date; each additional 30 minutes is 99292. Time spent on separately reportable procedures is billed on those procedure codes and must not be counted in the critical care minutes, and CPT's bundled-services list — chest X-ray interpretation, pulse oximetry, blood gases, ventilator management, vascular access and others — is inside critical care rather than billable beside it (Medicare Claims Processing Manual, chapter 12, section 30.6.12).
Can we bill an E/M plus a procedure on the same ED visit?
Yes, but with modifier 25 on the E/M code if the E/M was a significant, separately identifiable service from the procedure. The E/M cannot be just the assessment leading to the procedure — it must reflect work above and beyond what is normally bundled with the procedure. Documentation must establish the distinction.
How do you handle observation status billing?
Not on the old observation codes, which no longer exist. CPT deleted 99217–99220 and 99224–99226 effective 1 January 2023 and merged observation into the hospital inpatient or observation family: 99221–99223 initial, 99231–99233 subsequent, 99238 or 99239 for discharge day management, and 99234–99236 when admission and discharge fall on the same calendar date. CMS applies a stay test to the same-date codes — under 8 hours, initial care only and no discharge code; 8 hours or more with same-date discharge, 99234–99236 (Medicare Claims Processing Manual, chapter 12, section 30.6.8). The hourly observation codes G0378 and G0379 belong on the hospital's claim, not the group's.
Does EMTALA change how our group gets paid?
Less than people expect, because the obligation is the hospital's. Under 42 CFR 489.24, where an individual comes to the emergency department — whether or not eligible for Medicare, and regardless of ability to pay — the hospital must provide an appropriate medical screening examination within the capability of its emergency department, and must not discriminate on the basis of source of payment or ability to pay. The physician group still bills its own professional claim for the work it did. The practical consequence is on the receivable, not the rule: the hospital's unreimbursed cost runs through its Medicare cost report, while the group's unpaid professional balances stay on the group's books. We bill them, screen for financial assistance, and take them to a documented write-off rather than never raising the charge.
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