CPT 99285: emergency department visit, high decision making
99285 reports an emergency department visit that needs a medically appropriate history or exam and high medical decision making. It is the top of the five ED levels, and the chart has to show a threat to life or bodily function or a high-risk decision.
Written by Salman Saeed, CEO and Co-Founder · Reviewed by a Certified Medical Coder · Last reviewed October 2026In short: 99285 matches high MDM: a high-complexity problem, extensive data and high risk. It is not time-based, and it is not critical care. A patient who needs 30 or more minutes of critical care moves to 99291 instead.
What does CPT 99285 report?
The AMA descriptor, in plain words, is an emergency department visit for a patient, needing a medically appropriate history or exam and high medical decision making. CMS prints its label as "Emergency dept visit hi mdm".
| Item | Value in RVU26D (October 2026) |
|---|---|
| Payment status | A (active code) |
| Work RVU | 4.00 |
| Facility total RVU | 5.13 |
| Non-facility practice expense | Marked NA, meaning rarely or never performed in the non-facility setting |
| Global period | XXX |
What does high MDM require in the ED?
ACEP's FAQ maps 99285 to a high problem, extensive data and high risk. The table below says what each element looks like, and the problem element often decides it: the AMA guidelines say the final diagnosis does not set complexity, so a work-up for a possible life threat can support high MDM when the final diagnosis is benign.
| MDM element | Tier for 99285 | What counts, per ACEP |
|---|---|---|
| Problems addressed | High: a chronic illness with severe exacerbation, or an acute or chronic illness or injury that poses a threat to life or bodily function | Presentations ACEP lists as possible high problems include sepsis, pulmonary embolism, cardiac ischemia, stroke and significant trauma |
| Data reviewed | Extensive: at least two of the three data categories | Three tests or notes, plus an independent interpretation or a discussion with an outside clinician |
| Risk of management | High: for example a decision regarding hospitalization, emergency major surgery, parenteral controlled substances | A decision to admit or not to admit counts even if the patient goes home |
ACEP says the high problem examples are not an all-inclusive list and that a documented risk calculator such as HEART or PERC supports complexity.
A 62 year old has chest pain and shortness of breath. The physician orders a troponin, a CBC, a metabolic panel and an ECG, interprets the ECG personally, calls cardiology to discuss, and decides to admit to observation. Threat to life considered, extensive data, hospitalization decision: 99285. The final diagnosis can be a benign one and the level stands.
How is 99285 different from 99284 and from critical care?
The difference between 99284 and 99285 is the tier of at least two of the three MDM elements. A visit with moderate problem and moderate data but a high-risk decision such as admission can still reach high if two elements are high; the table above shows each tier.
Critical care is a different service. Chapter 12 section 30.6.12.1 adopts the CPT definition: direct delivery of care to a critically ill or injured patient with acute impairment of a vital organ system and a probability of imminent or life-threatening deterioration, involving high complexity decision making. It is time-based, so a patient receiving 30 or more minutes goes to 99291.
When an E/M is performed the same date as critical care, section 30.6.12.6 allows both only if the other visit came before the critical care at a time the patient did not need it, was medically necessary, and was separate and distinct. Modifier 25 goes on the critical care code. Section 30.6.15 says prolonged services are not reported with ED visits.
How does 99285 appear on the claim?
Professional claim: Item 24B place of service 23, Item 24D 99285, Item 24G 1. If the same physician admits the patient, Chapter 12 section 30.6.8 A pays the initial hospital care code and not an ED visit by that practitioner for the same date. Facility claim: 045x revenue code, with the hospital's level chosen under Chapter 4 section 160. Type B departments use G0384, level 5.
The NCCI MUE for 99285 effective October 1, 2026 is 1 for practitioners and 2 for outpatient hospital, indicator 3. See NCCI edits.
How does an admission decision change who bills what?
A high MDM visit often ends in admission, and the claim depends on who admits. A practitioner who sees the patient in the ED and admits bills initial hospital care and not the ED visit that date (section 30.6.9.1 A). If the patient's own physician comes in and admits, that physician bills only 99221 to 99223 and the ED physician bills the ED level (section 30.6.11 E).
The ED physician reads the ECG, consults cardiology and hands the patient to a hospitalist, documenting the threat to life considered. The ED physician bills 99285. The hospitalist bills 99223, with modifier AI as principal physician of record. The hospital's ED line sits separately in FL 44.
Why is 99285 denied or downcoded, and how do you appeal?
| Code | What X12 says | What usually causes it on 99285 |
|---|---|---|
| CO-150 | Payer deems the information does not support this level of service | The payer reads the final diagnosis, not the presenting threat, and downcodes to 99284 |
| CO-151 | Payer deems the information does not support this many or this frequency of services | Return visits within a short window |
| CO-50 | Non-covered because the payer does not deem it medically necessary | Payer applies a diagnosis-based review to ED claims |
| CO-97 | Benefit is included in the payment for another service already adjudicated | A second E/M on the same date from the same physician |
An appeal for a downcode should quote the chart: the presenting problem and what was ruled out, each test and who reviewed it, the discussion with others, and the disposition decision. Use the filing window in the payer's denial notice. If these denials keep coming back, our denial management team can work them. The level below is 99284.
Related codes
- Physician Fee Schedule relative value files, RVU26D (October 2026) · CMS
- Medicare NCCI Medically Unlikely Edits, practitioner and outpatient hospital tables, effective 10-01-2026 · CMS
- Medicare Claims Processing Manual, Chapter 12: Physicians/Nonphysician Practitioners · CMS
- Medicare Claims Processing Manual, Chapter 4: Part B Hospital (Including Inpatient Hospital Part B and OPPS) · CMS
- Medicare Claims Processing Manual, Chapter 26: Completing and Processing Form CMS-1500 Data Set · CMS
- Claim Adjustment Reason Codes · X12
- Place of service code set · CMS
- HCPCS quarterly update, October 2026 alpha-numeric file · CMS
- 2023 ED E/M guidelines FAQs (ACEP Coding and Nomenclature Advisory Committee) · American College of Emergency Physicians
- Medicare Claims Processing Manual, Chapter 25: Completing and Processing the Form CMS-1450 Data Set · CMS
We check every rule, code and deadline against the official source. See our editorial policy.
Common questions
Straight answers from the team that does the work.
Ask a billing lead directly. A 20-minute call, Monday to Friday, 9am to 5pm Eastern.
01What is the difference between 99284 and 99285 for an ED visit?
99284 needs moderate MDM and 99285 needs high MDM. High means a threat to life or bodily function or a severe chronic exacerbation, extensive data across two categories, and a high-risk decision such as hospitalization. Time and exam do not set the level.
02Why do payers downcode ED visits and how do we appeal?
Payers often review the final diagnosis, not the presenting threat, and apply CARC 150 for the level. Appeal with the chart: the problem and what was ruled out, each test, discussions with other clinicians and the disposition decision. Follow the filing window on the denial notice.
03Can 99285 be billed with critical care on the same day?
Only under Chapter 12 section 30.6.12.6: the other E/M came before critical care when the patient did not need it, was medically necessary, and was separate. Modifier 25 goes on the critical care code. Time spent on the E/M cannot be counted toward critical care.
04Does 99285 require a minimum time?
No. ED levels are selected on MDM only, not time. CMS Chapter 12 section 30.6.1 says for ED visits the practitioner uses only MDM or only time as the CPT code directs, and for 99281 to 99285 that is MDM.
05Can I report a prolonged service with 99285?
No. Chapter 12 section 30.6.15 says prolonged services are not reported in conjunction with emergency department visits or critical care services. Document the decision making instead, and consider whether the service meets the critical care definition, which is time-based and reported with 99291.
Losing money on ED levels?
We code from the chart and appeal every unfair downcode.