CPT Code 99204: New Patient Office Visit, 45-59 Minutes

CPT code 99204 reports an office or outpatient visit for the evaluation and management of a new patient involving moderate medical decision-making. 

It belongs to the E/M category and applies exclusively to patients who have not received professional services from the same physician or same-specialty group within the past three years. 

Providers select 99204 through either moderate MDM (two of three elements at moderate) or 45-59 minutes of qualifying physician time on the date of service.

Accuracy with 99204 carries higher stakes than most codes in the new-patient family. 

CMS runs an automated Recovery Audit specifically titled “New Patient Visits: Incorrect Coding” — and its FY2024 analysis flagged a 4.5% improper-payment rate for 99204, translating to roughly $86 million. 

The two most common triggers are misidentifying established patients as new and relying on a single moderate MDM element to justify a level-4 code.

What does CPT code 99204 cover?

A single reference table with the facts billing teams look up most often.

Detail	CPT 99204
Description	New patient office visit, 45-59 minutes
Category	Evaluation and Management (E/M)
Patient type	New only
MDM level	Moderate
Time	45-59 total physician/QHP minutes
Common modifiers	25, 57, 95, 93
Medicare rate	~$177.36 non-facility / ~$116.90 facility (2026)
Commonly compared with	CPT 99203

The AMA describes a typical 99204 encounter as a new patient with a progressing illness or acute injury requiring medical management or potential surgical treatment. 

In practice, most 99204 visits involve patients establishing care with multiple active conditions, new diagnoses requiring workup, or injuries needing clinical decision-making beyond a straightforward evaluation.

When should you use CPT 99204?

Two gates must be cleared before 99204 is appropriate — the patient must genuinely qualify as new, and the clinical work must reach moderate complexity.

Use CPT 99204 when

• The patient has not received professional services from the physician or same-specialty group in the past 3 years
• At least two of three MDM elements reach the moderate level
• Or the provider spends 45-59 qualifying minutes on the date of service
• The visit involves active management decisions — medication initiation, diagnostic workup, or treatment planning for conditions with meaningful complexity

Consider a new patient establishing care for type 2 diabetes and hypertension, both currently stable. 

The physician evaluates both diseases, reviews prior treatment history, and continues or adjusts prescription medications. 

Two stable chronic illnesses meet the moderate problems threshold, and prescription drug management satisfies moderate risk — with two moderate elements, 99204 is appropriate.

When not to use it

• Only one moderate MDM element and <45 minutes → use 99203
• Same-specialty group visit within three years → use established-patient code 99214
• Prescription management alone → does not meet the two-of-three MDM requirement
• Same-day minor procedure → new-patient status alone does not support separate E/M billing

How is CPT 99204 selected?

Two independent pathways support 99204. A provider does not need both.

MDM pathway

At least two of these three elements must reach the moderate level per the AMA MDM grid.

MDM element	Moderate threshold for 99204
Problems addressed	1+ chronic illness with exacerbation, 2+ stable chronic illnesses, 1 undiagnosed new problem with uncertain prognosis, 1 acute illness with systemic symptoms, or 1 acute complicated injury
Data reviewed	Cat. 1 (combination of 3 from unique tests/external notes/independent historian), or Cat. 2 (independent test interpretation), or Cat. 3 (discussion with external physician)
Risk	Prescription drug management, minor surgery with identified risk factors, elective major surgery without risk factors, or treatment limited by social determinants

The prescription-management trap applies here exactly as it does with 99214 — moderate risk is only one element. 

A new patient with one uncomplicated condition and minimal data review has just one moderate element, which lands at 99203 rather than 99204 by MDM.

Time pathway

If 45-59 total physician/QHP minutes are spent on the date of service, 99204 is independently supported regardless of MDM level. 

Qualifying time includes chart review, history gathering, examination, counseling, ordering, coordination, and documentation. Time assigned to separately billed procedures does not count.

When MDM determines the code, there is no CPT requirement to document time or to spend 45 minutes. Time documentation matters only when time is the basis for code selection.

What documentation supports CPT 99204?

For a new-patient visit billed at level 4, the documentation carries a heavier burden than established-patient E/M codes — partly because CMS specifically audits new-patient status and partly because the $177 reimbursement attracts closer scrutiny.

The note should establish

• Assessment and management plan
• Medication decisions or treatment risk
• Medical necessity for a level-4 encounter
• Clinical status and severity of those conditions
• Which conditions the provider actually evaluated or managed
• Why the patient qualifies as new under the three-year/same-specialty rule
• Specific tests, records, or external sources reviewed (if counting toward data)

When billing by time, record actual total minutes. If MDM supports 99204 independently, CPT does not require 45 minutes or time documentation.

The old history/exam bullet-counting system no longer determines the E/M level — code selection depends on MDM or time since the 2021 guideline changes.

How much does CPT 99204 reimburse?

New-patient level-4 visits pay meaningfully more than level-3 — but that gap also makes 99204 a frequent audit target.

Payment type	2026 rate
Medicare non-facility (national baseline)	~$177.36
Medicare facility (national baseline)	~$116.90
Commercial payers (median observed)	~$180.91
Commercial 75th percentile	~$246.64
Medicaid	Varies by state

Medicare rates from CMS 2026 PFS national baselines (non-QP conversion factor ~$33.40). Commercial data from Transparency-in-Coverage negotiated-rate files (Reddenda, 2026).

The $60 gap between non-facility and facility rates exists because the hospital separately bills for overhead costs. Geographic Practice Cost Indices further adjust these amounts — actual Medicare allowable ranges from the low $160s to above $220 depending on locality.

CMS has proposed a 2027 conversion factor reduction of roughly 1.68% for non-QP providers. 

If finalized, 99204 payments would decrease next year. The same proposed rule includes a potential 50% reduction for same-day E/M services billed alongside procedures with global periods — a significant revenue impact for practices that frequently bill 99204-25 with minor procedures.

Which modifiers apply to CPT 99204?

Only modifiers relevant to new-patient encounters at the moderate-complexity level.

Modifier	When it applies
25	Significant, separately identifiable E/M on the same day as a procedure — new-patient status alone does NOT justify this modifier
57	E/M resulting in the decision for major surgery (90-day global)
95	Synchronous audio-video telehealth (Medicare and most commercial payers)
93	Audio-only telehealth (Medicare qualifying services through 12/31/2027)
24	Unrelated E/M during a postoperative global period (uncommon with new patients)

For Medicare telehealth, pair modifier 95 (audio-video) or 93 (audio-only) with POS 10 (patient home, ~$177.36 non-facility rate) or POS 02 (other location, ~$116.90 facility rate).

The NCCI policy manual explicitly addresses modifier 25 for new patients — performing a minor procedure on a new patient does not automatically justify a separate E/M. 

The routine evaluation leading to a minor procedure is included in the procedure payment. Only genuinely separate clinical work warrants 99204-25, and OIG enforcement actions have specifically targeted this pattern.

CPT 99204 vs. 99203 — which one fits?

Both codes cover new patients. The entire difference sits in whether the clinical work reaches moderate complexity or stays at low.

Feature	CPT 99204	CPT 99203
Patient type	New	New
MDM level	Moderate	Low
Time	45-59 minutes	30-44 minutes
Typical use	2+ stable chronic conditions, exacerbation, uncertain-prognosis problem, acute with systemic symptoms	1 stable chronic, uncomplicated acute injury
Medicare rate (2026)	~$177.36	~$117.57
Work RVU	2.60	1.60

Choose 99204 when at least two MDM elements reach moderate, or qualifying time reaches 45+ minutes.

Choose 99203 when overall MDM is low (fewer than two elements reach moderate) and qualifying time is 30-44 minutes.

The pattern that trips up the most practices — one uncomplicated new problem plus prescription management. The prescription satisfies moderate risk, but a single uncomplicated problem is only low. 

With just one moderate element, overall MDM stays low and 99203 applies. 

Add a second chronic condition being actively managed, and the problems element jumps to moderate — now two elements qualify, and 99204 is correct.

What billing errors should you avoid with CPT 99204?

Five errors account for most 99204 denials and audit exposure — and the first one is unique to new-patient codes.

1. Miscoding an established patient as new 

CMS runs an automated Recovery Audit specifically targeting incorrect new-patient coding. Verify the three-year/same-specialty history before selecting any 992XX code. 

“First time I personally saw them” does not mean new under CPT if another physician in the same group specialty saw them within three years.

2. Treating one moderate element as sufficient 

Prescription drug management alone satisfies moderate risk — one element. Without a second moderate element in problems or data, overall MDM is low and 99203 is the correct code.

3. Counting every diagnosis on the intake form 

Only conditions actually addressed during the encounter count toward MDM. Writing “diabetes — managed by endocrinology” without evaluating or managing the condition does not contribute to the problems element.

4. Using modifier 25 simply because the patient is new 

The NCCI manual explicitly states that new-patient status does not by itself justify separate E/M billing alongside a same-day minor procedure. The E/M work must be genuinely separate from and beyond the procedure’s inherent evaluation.

5. Unsupported time documentation 

When billing by time, 45 qualifying physician/QHP minutes must be reached. Staff time, separately billed procedure time, and work on other dates do not count. Record the actual total minutes.

Frequently asked questions about CPT 99204

Here are some commonly asked questions about CPT 99204: