ED billing turns on 5-level E/M selection (99281–99285) driven by Medical Decision Making, critical care time capture for 99291/99292, modifier 25 with same-day procedures, and facility/professional coordination. General billers downcode 99284/99285 for MDM documentation gaps and lose critical care time. MedFactor delivers ED-specific RCM that protects every claim.
From general emergency medicine to trauma, critical care, and freestanding EDs, we tailor billing to the coding rules of every emergency medicine subspecialty.
ED E/M 99281–99285 MDM-driven leveling, modifier 25 with same-day procedures, and accurate critical care time capture.
Age-based E/M, pediatric acuity weighting, and modifier 25 with pediatric ED procedures and observation.
Trauma team activation, critical care 99291/99292, and multi-system injury documentation with modifier accuracy.
99291/99292 minute-level time capture, critical care add-on coding, and intensive monitoring documentation.
Type B ED facility coding (G0380–G0384), state-specific freestanding rules, and facility/professional splits.
Observation admit/discharge, MDM complexity crossover, and observation vs inpatient status documentation.
Since 2023, ED E/M codes 99282–99285 are selected by Medical Decision Making complexity (not time), while 99281 remains minimal. Mapping each encounter to the correct MDM level — and supporting it with documentation — is the single largest ED revenue lever.
Each ED E/M level maps to a 5-level Emergency Severity Index (ESI) acuity, with the documentation basis that supports the MDM complexity.
Emergency medicine billing is governed by MDM-driven E/M leveling, critical care time, modifier 25, and facility/professional coordination that general billing companies cannot navigate effectively.
99284/99285 downcoded to a lower level when MDM documentation does not explicitly support the moderate or high complexity.
E/M billed with a same-day procedure (laceration repair, fracture care) without modifier 25, denied as bundled.
99291/99292 denied when critical care time is not documented minute-by-minute to meet the 30-minute threshold.
ED claims denied where the professional (CMS-1500) and facility (UB-04) components are submitted uncoordinated.
High-acuity 99284/99285 denied for medical-necessity gaps when the presenting problem severity is not documented.
Observation services billed without MDM support or misaligned between ED observation and inpatient status.
Quick reference for the most frequently used codes in emergency medicine billing and coding.
| Code | Description | Common Use |
|---|---|---|
| 99281 | ED visit, minimal level | ESI 5, minimal encounter |
| 99282 | ED visit, straightforward MDM | ESI 4, straightforward MDM |
| 99283 | ED visit, low MDM | ESI 3, low MDM |
| 99284 | ED visit, moderate MDM | ESI 2, moderate MDM |
| 99285 | ED visit, high MDM | ESI 1, high MDM |
| 99291 | Critical care, first 30–74 min | Critically ill patient, add-on |
| 99292 | Critical care, each addl 30 min | Additional critical care time |
| G0380–G0384 | Type B ED facility visit levels 1–5 | Freestanding / Type B ED facility |
| Code | Description | Clinical Context |
|---|---|---|
| R07.9 | Chest pain, unspecified | Cardiac / pulmonary workup |
| R55 | Syncope and collapse | ED syncope evaluation |
| R56.9 | Seizure, unspecified | Seizure evaluation |
| S06.9 | Intracranial injury (head injury) | Trauma / head injury |
| J18.9 | Pneumonia, unspecified organism | Respiratory / admission |
| R50.9 | Fever, unspecified | Fever workup |
| K59.0 | Constipation | Abdominal complaint |
| R10.9 | Abdominal pain, unspecified | Abdominal pain evaluation |
| R42 | Dizziness and giddiness | Dizziness workup |
| R11.2 | Nausea with vomiting, unspecified | GI complaint |
| Modifier | Description | ED Application |
|---|---|---|
| 25 | Significant, separately identifiable E/M | E/M with same-day ED procedure |
| 27 | Multiple outpatient hospital E/M same date | Two separate ED E/M encounters same day (UB-04) |
| 24 | Unrelated E/M during postop period | Unrelated ED E/M in a global period |
| 57 | Decision for surgery | ED E/M resulting in decision for surgery |
| 52 | Reduced services | Reduced ED procedure (not full service) |
| 95 | Telehealth via real-time audio/video | ED telehealth follow-up |
| 59 | Distinct procedural service | Distinct ED procedure same session |
| 22 | Increased procedural service | Unusually complex ED procedure |
Comprehensive revenue cycle management designed specifically for emergency medicine practices.
Specialty coders handle ED E/M 99281–99285 MDM leveling, modifier 25/27, and critical care 99291/99292 with accuracy.
Downcoded E/M reinstatement, critical care time appeals, and modifier 25 defense with procedural documentation.
Minute-by-minute 99291/99292 time capture with supporting documentation so critical care is paid, not denied.
Aligned professional (CMS-1500) and facility (UB-04) ED claims so the two components match and clear cleanly.
Prioritized follow-up on aged ED and critical care claims with strategic payer escalation to maximize recovery.
Real-time dashboards tracking E/M level distribution, acuity mix, and denial trends by payer and provider.
Understanding the most common denial reasons is the first step to preventing them on ED E/M, critical care, and procedural claims.
99284/99285 downcoded to a lower level when MDM documentation does not explicitly support moderate or high complexity.
MDM-driven level selection with documentation support on every high-acuity E/M claim.
E/M billed with a same-day procedure (laceration repair, fracture care) without modifier 25, denied as bundled.
Modifier 25 appended to E/M with a distinct same-day procedure and separate documentation.
99291/99292 denied when critical care time is not documented minute-by-minute to meet the threshold.
Minute-by-minute time capture with supporting documentation for 99291 and each 99292.
ED claims denied where the professional and facility billing are submitted uncoordinated or inconsistent.
Align professional and facility claims so both components match and clear cleanly.
Identifying and plugging these common revenue leakage points can significantly improve your practice’s bottom line.
99284/99285 downcoded for MDM documentation gaps, losing high-acuity E/M revenue.
99291/99292 undocumented time not billed or denied at the threshold.
E/M with a same-day procedure billed without modifier 25, denied as bundled.
ED claims denied where facility and professional components conflict.
See how emergency-medicine-specific revenue cycle management transforms your practice’s financial performance.
A structured onboarding process designed to deliver measurable improvements within the first 90 days.
Review of ED billing operations, E/M level capture, critical care time, and revenue cycle baseline.
EMR and ED tracking-system integration, dedicated ED billing team, and payer enrollment verification.
Full billing with real-time claim submission, modifier verification, and denial prevention protocols.
Performance review against baseline, workflow optimization, and documented revenue improvement.
How our emergency-medicine-specific approach compares to in-house billing and general medical billing companies.
| Capability | In-House Team | General Billing Co. | MedFactor ED |
|---|---|---|---|
| ED E/M 99281–99285 MDM leveling | Inconsistent | ✕ | ✓ |
| Critical care 99291/99292 time capture | ✕ | ✕ | ✓ |
| Modifier 25 with same-day procedures | Inconsistent | ✕ | ✓ |
| Modifier 27 multiple ED E/M same day | Manual | ✕ | ✓ |
| Facility/professional coordination | Inconsistent | Partial | ✓ |
| Freestanding ED (G0380–G0384) coding | Manual | ✕ | ✓ |
| Observation crossover billing | Inconsistent | Partial | ✓ |
| Downcoding appeal defense | Manual | Partial | ✓ |
| Dedicated ED billing team | ✕ | ✕ | ✓ |
Our team combines deep emergency medicine billing expertise with the technology and processes to deliver consistent, measurable results for hospital-based and freestanding EDs.
Discover exactly where your emergency medicine practice is losing revenue. Our no-obligation audit analyzes your E/M level capture, critical care time, and modifier compliance.
Real results from emergency medicine practices that partnered with MedFactor for specialty revenue cycle management.
A hospital-based ED group was downcoding 99284/99285 for MDM documentation gaps. MedFactor implemented MDM-driven leveling with documentation templates, recovering substantial ED E/M revenue in seven months.
An ED group was not capturing 99291/99292 minute-level time and losing critical care revenue. MedFactor implemented minute-by-minute time tracking, recovering critical care revenue per encounter.
A freestanding ED was misapplying Type B facility levels (G0380–G0384) and submitting uncoordinated facility/professional claims. MedFactor aligned both claim types, increasing net collections.
No matter where your ED practice operates, our team understands the payer landscape and regulatory requirements in your region.
Deep coding knowledge across Medicare, Medicaid, and commercial payers for ED services.
State-specific freestanding ED licensing and facility coding rules applied correctly.
Hospital-based ED facility and professional billing aligned across all payers.
99291/99292 time documentation standards applied consistently across payers.
Common questions from emergency medicine practices considering MedFactor’s specialty RCM services.
Since 2023, ED E/M levels 99282–99285 are selected by Medical Decision Making (MDM) complexity — not time. 99281 remains a minimal encounter that may not require physician presence. 99282 is straightforward MDM, 99283 low, 99284 moderate, and 99285 high MDM. History and exam are medically appropriate but do not determine the level. We map each encounter to the correct MDM level with supporting documentation so 99284/99285 are paid at the high-acuity level rather than downcoded for documentation gaps.
99291 is reported for the first 30–74 minutes of critical care for a critically ill patient meeting critical care criteria, and 99292 for each additional 30 minutes. Critical care is billed as an add-on to the ED E/M, not a replacement for it, and requires minute-level time documentation. We capture critical care time minute-by-minute so 99291 and each 99292 are paid rather than denied for undocumented time.
When a significant, separately identifiable E/M is performed with a same-day procedure by the same provider, modifier 25 is appended to the E/M. In the ED this commonly applies to E/M with laceration repair, fracture care, or other procedures. Without modifier 25 the E/M is denied as bundled into the procedure. We append modifier 25 with separate documentation so the E/M is paid alongside the procedure.
Professional billing (CMS-1500) covers the physician ED E/M and critical care; facility billing (UB-04) covers the hospital ED resources and uses facility level codes — 99281–99285 for Type A (24/7) EDs and G0380–G0384 for Type B (non-24/7 or freestanding) EDs. Misalignment between the two causes denials. We coordinate both claim types so the professional and facility components match and clear cleanly.
Freestanding EDs are often Type B and report facility levels with HCPCS G0380–G0384 instead of CPT 99281–99285. State rules vary on freestanding ED licensing, facility fees, and payer recognition — some payers treat them as EDs, others as outpatient or non-covered settings. We apply the correct facility code set per state and payer and align the facility and professional claims so freestanding ED claims are paid rather than denied for coding or coordination errors.
We integrate with all major ED and hospital platforms including Epic, Cerner, Athenahealth, Meditech, and ED tracking/boarding systems. Our team works with your ED documentation, acuity (ESI) data, and critical care time logs so each encounter flows to correct code submission — including the MDM level, modifier 25/27, and critical care 99291/99292 time that drive accurate ED coding.
MedFactor applies the same code-level precision across the full practice spectrum. See how we bill these related specialties.
CPT®, ICD-10, HCPCS, and modifier codes referenced on this page reflect the current code sets and are subject to annual updates — always verify against the current-year fee schedule before submission. KPIs and case-study figures shown are representative benchmarks, not guarantees of individual practice results.
Your ED practice deserves billing partners who know 99281–99285 MDM leveling, critical care 99291/99292 time capture, and modifier 25 rules — and code every claim correctly. Let MedFactor show you what specialty RCM can do.