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This guide breaks it all down in plain language. No jargon overload. No confusing tables without context. Just a clear, practical walkthrough of everything you need to know about 99204 in 2025 and 2026.

What Is CPT Code 99204? (99204 CPT Code Description)

The 99204 CPT code description, as defined by the American Medical Association (AMA), is:

"Office or other outpatient visit for the evaluation and management of a new patient, which requires a medically appropriate history and/or examination and moderate level of medical decision making."

In simpler terms, 99204 is used when a new patient comes in for an office or outpatient visit, and the case is moderately complex - not routine, but not the most complicated either.

This code sits at Level 4 on the new patient E/M (Evaluation and Management) scale, which runs from 99202 (low complexity) to 99205 (high complexity). It's one of the most commonly billed E/M codes in primary care and specialty outpatient settings.

Who Is a "New Patient"?

This is important. A new patient is someone who has not been seen by any provider in the same practice or specialty group within the past three years. If the patient was seen within the last three years, they're considered established, and you'd use a different code (like 99214 for a comparable complexity level).

99204 CPT Code Description Time

One of the most common questions providers ask is: how long does a 99204 visit need to be?

The 99204 CPT code time requirement is 45 to 59 minutes of total time on the date of the encounter. This is a key range - not a minimum or a maximum, but a defined window.

What Counts Toward Total Time?

Since the 2021 E/M guideline updates, "total time" includes both face-to-face and non-face-to-face work that the billing provider personally performs on the same calendar date. This includes:

• Reviewing medical records before the visit
• Taking the patient's history
• Performing the physical examination
• Ordering and reviewing test results
• Counseling the patient and family
• Documenting the visit in the EHR
• Coordinating care with other providers

What does not count toward total time:

• Work performed on a different date
• Time spent by other clinical staff (nurses, medical assistants, etc.)
• Travel time

Documenting Time Correctly

If you're billing 99204 based on time, documentation matters a great deal. Payers, including Medicare require that you document the total number of minutes spent on the encounter. Vague statements like "approximately 45 minutes" may not hold up in a payer review. A clear statement such as "Total time: 47 minutes" is far more defensible.

You can also document start and stop times, which makes the calculation transparent and audit-proof.

99204 CPT Code Requirements

There are two pathways to justify billing 99204 Medical Decision Making (MDM) or Time. You only need to meet one of these - whichever best fits the encounter.

Pathway 1: Medical Decision Making (MDM)

To use the MDM pathway, the provider must meet at least 2 of the following 3 elements at the moderate complexity level:

1. Number and Complexity of Problems

• One or more chronic illnesses with exacerbation, progression, or side effects
• Two or more stable chronic illnesses
• One undiagnosed new problem with uncertain prognosis
• One acute illness with systemic symptoms

2. Amount and Complexity of Data Reviewed

• Review of external records or independent interpretation of diagnostic tests
• Independent interpretation of a test (reading an ECG or X-ray yourself)
• Discussion with another provider about the patient's management

3. Risk of Complications and Morbidity

• Prescription drug management (starting, stopping, or changing a medication)
• Decision regarding minor surgery with identified patient or procedure risk factors
• Diagnosis or treatment significantly limited by social determinants of health

Pathway 2: Time

As discussed, billing by time requires 45 to 59 minutes of total provider time on the date of service. This pathway is especially helpful when the visit involves extensive counseling, education, or care coordination that may not map neatly to MDM elements.

Other Requirements to Keep in Mind

• The patient must be new to the practice (not seen in 3 years)
• A medically appropriate history and/or physical examination must be documented (the level of detail is at the provider's clinical judgment)
• Documentation must clearly support the code level selected

99204 CPT Code Description Age Limit

Here's a question that comes up frequently: is there an age limit for 99204?

The answer is no. The 99204 CPT code description age limit is essentially zero — the code applies to patients of all ages, from newborns to elderly adults. Pediatric patients use the same office visit codes (99202–99205) as adults. The only exception is for very specialized care. Neonatal and pediatric critical care use separate codes (like 99468–99469 and 99291–99292). But for standard outpatient visits, 99204 works across the full age spectrum.

99204 CPT Code RVU (Relative Value Units)

Understanding the 99204 CPT code RVU helps you understand how Medicare calculates payment. RVUs are the building blocks of physician reimbursement under the Medicare Physician Fee Schedule.

For 2026, CPT code 99204 carries:

RVU Component	Value
Work RVU (wRVU)	2.60
Practice Expense RVU (Non-Facility)	varies
Malpractice RVU	0.22
Total Non-Facility RVU	~3.56

99204 CPT Code Cost and Reimbursement

Now let's talk money. What can you expect in terms of 99204 CPT code reimbursement?

Medicare Reimbursement

Based on available 2025 data, Medicare paid approximately $167.10 nationally for a 99204 visit (non-facility setting). For 2026, base calculations using the updated conversion factor put the figure closer to $118-$120 under the non-qualifying rate, though the qualifying rate for Advanced Payment Models is higher.

Exact payments vary by location. Always verify your specific rate using CMS's RVU search tool at CMS.gov.

Commercial Insurance Reimbursement

99204 CPT code cost when billed to commercial payers varies widely. Most commercial contracts pay a percentage of Medicare, commonly 120% to 250% of the Medicare rate. This means:

• National average across all payers: roughly $181 to $245
• High-value contracts in competitive markets can go higher

A single misuse of a lower-level code (e.g., billing 99202 instead of 99204 when 99204 is warranted) can cost a practice approximately $95 per claim in lost revenue. For a busy practice, this underbilling adds up fast.

Place of Service Matters

• Non-facility (office) setting: Higher physician payment
• Facility (hospital outpatient): Lower physician payment because the facility receives a separate payment

99204 CPT Code Modifier

Modifiers are two-digit codes added to CPT codes to provide additional information about a service. The 99204 CPT code modifier options are important to know.

Modifier 25 - Significant, Separately Identifiable E/M Service

This is the most common modifier used with 99204. You append Modifier 25 when the new patient E/M visit is a significant, separately identifiable service performed on the same day as a procedure.

For example, if a physician evaluates a new patient and also performs a minor procedure (like a skin lesion removal) on the same visit, Modifier 25 tells the payer that the E/M visit was distinct from the procedure - not just pre- or post-procedure care.

Caution: Don't use Modifier 25 as a blanket add-on for every same-day procedure. It should only be used when the E/M was genuinely separate and independently documented.

Modifier 24 - E/M During a Postoperative Period

Modifier 24 is used when a provider performs a 99204 visit that addresses a condition unrelated to a recent surgery, during that surgery's global period. Documentation must clearly state why the visit is unrelated to the surgical procedure.

Modifier 95 - Telehealth

Modifier 95 signals that the entire encounter was delivered via synchronous audio-video telehealth. When using this modifier, documentation must include:

• Patient consent for telehealth
• The platform used
• Confirmation that all required elements (history, MDM, or time) were completed during the real-time session

Yes, 99204 can be billed for telehealth encounters as long as all standard MDM or time requirements are met during the virtual visit.

Common Billing Mistakes to Avoid

Even experienced billers and providers make errors with 99204. Here are the most frequent pitfalls:

1. Vague time documentation: "Spent about 50 minutes with the patient" is not good enough for payer audits. Use specific total time statements or start/stop times.

2. Incomplete MDM documentation: Listing "hypertension" without noting whether it's controlled, uncontrolled, or complicated doesn't support moderate MDM. Be specific about disease status, management challenges, and decision complexity.

3. Generic data review statements: Writing "records reviewed" without specifying what records, from where, and what they contributed to your decision doesn't satisfy the data element of MDM.

4. New vs. established patient confusion: Billing 99204 for an established patient (seen within 3 years) is incorrect and can lead to claim denials or overpayment recoupment demands.

5. Automatic downcoding: As of October 2025, Cigna implemented algorithmic downcoding their system can automatically reduce a 99204 to a 99203 if documentation doesn't clearly support each moderate MDM element. This happens before a human even reviews the claim.

How to Appeal a Denied 99204 Claim

Denials happen. Here's a systematic approach when 99204 gets denied:

• Review the denial reason code. Common ones include CO-4, CO-97, and CO-16
• Pull the original note and compare it against MDM or time requirements
• Write a focused appeal letter citing specific documentation language, and AMA CPT guidelines
• Include the applicable MDM framework that demonstrates your documentation meets moderate complexity
• Submit within the payer's appeal window, typically 90 to 180 days; missing this deadline means the revenue is permanently lost

99204 vs. Related Codes: When to Use Which

Understanding how 99204 fits into the broader E/M landscape helps with accurate code selection:

Code	Patient Type	Complexity	Time
99202	New	Straightforward	15–29 min
99203	New	Low	30–44 min
99204	New	Moderate	45–59 min
99205	New	High	60–74 min
99213	Established	Low	20–29 min
99214	Established	Moderate	30–39 min

The key differentiator for 99204 is the moderate complexity requirement, through either MDM or time investment.

The G2211 Add-On Code: Extra Revenue Opportunity

Starting January 1, 2025, the G2211 add-on code rules allow providers to report G2211 alongside 99204 when the visit is part of ongoing, longitudinal care for a patient's single, serious, or complex chronic condition. This add-on can increase reimbursement significantly and is worth discussing with your billing team if you see complex patients regularly.