CPT 99204
New Patient Visit, Moderate MDM
How it is billed
- A patient is new only where no face-to-face professional service was received from the physician, or from a physician of the same specialty and subspecialty in the same group practice, within the previous three years
- Moderate decision-making is the same standard as the established-patient level four: two of three elements at moderate
- By time, 45 to 59 minutes of total time on the encounter date — 15 minutes wider than the established-patient equivalent
- The three-year test runs from the date of the last face-to-face service, and a service delivered by a different specialty within the same group does not make the patient established for this specialty
- Where a group has physicians and advanced practice providers, the same-specialty question follows how the provider is enrolled with that payer, not the internal job title
What the record must show
- The record should support the new-patient determination — a prior encounter three years and one month ago is a defensible new patient, and a prior encounter eleven months ago is not, whatever the registration system defaulted to
- Level selection rests on decision-making or time exactly as it does for established patients; a comprehensive history and examination no longer raise the level however thorough they were
- Where time is used, the total time on the encounter date carries the code, and new-patient visits genuinely reaching 45 minutes are common enough that failing to record it is expensive
A worked example
A patient attends a practice for the first time in four years with two chronic conditions previously managed elsewhere. The physician reviews external records, orders baseline laboratory testing, changes one medication and establishes a follow-up plan. Total time on the day is 52 minutes.
Both routes support 99204: moderate decision-making through the data and prescription elements, and 45 to 59 minutes on time. Either is sufficient, and only one needs to be documented as the basis.
Change the interval to two years and the coding changes entirely. The same work is now an established-patient visit at 99214 or 99215, because the three-year test failed — and a payer that holds the earlier claim will recode or deny it. The registration workflow, not the clinical note, is where this error is prevented.
What decides payment
New-patient visits pay more for a structural reason: the physician is constructing a problem list, medication history and baseline from nothing, and that work is real. The trade is that the payer holds a claims history capable of testing the assertion, which makes new-patient status one of the few E/M questions with an objective answer.
The same-specialty, same-group construction is where practices lose money in the other direction. Two physicians in one group who are enrolled under genuinely different specialties each treat the patient as new, and groups that apply a blanket rule of established-for-everyone forfeit the higher code they were entitled to.
Consultations complicate the picture for payers that still recognise them. Medicare has not paid consultation codes for many years and expects a new or established office visit code instead, while some commercial payers continue to accept them, so the same referral encounter can carry different codes by payer.
Denials this code attracts
Modifiers that apply
Codes billed alongside or confused with this one
Billed most in — Family Medicine · Internal Medicine · Urgent Care
Terms used here — E/M Coding · Eligibility Verification · CPT Code · Denial
How we handle it — Medical Coding · Eligibility Verification · Denial Management
Primary sources
What the code-set maintainers and payers actually publish about billing 99204.
- Evaluation and Management services guide (opens in a new tab)
Centers for Medicare & Medicaid Services — How E/M level is determined under the current medical decision making and time rules. The reference for any dispute about whether documentation supports a level.
- CPT code set (opens in a new tab)
American Medical Association — Maintainer of CPT. Annual changes to CPT are the most common cause of a sudden, unexplained rise in denials each January.
- Medicare Physician Fee Schedule lookup (opens in a new tab)
Centers for Medicare & Medicaid Services — Official allowed amounts by CPT/HCPCS code and locality. The reference point most commercial contracts are written against as a percentage.
Questions about CPT 99204
An office or outpatient visit with a new patient involving moderate medical decision-making, or 45 to 59 minutes of total time on the encounter date. It is the level-four new-patient code.
No face-to-face professional service from the same physician, or from a same-specialty and same-subspecialty physician in the same group, within the previous three years. A service from a different specialty in the same group does not make the patient established.
45 to 59 minutes of total time on the encounter date, which is 15 minutes wider than the established-patient equivalent. Total time includes the physician's record review, the visit and the documentation and ordering completed that day.
The payer holds the claims history and can recode or deny, usually recovering the difference post-payment. The error is prevented at registration rather than in the clinical note, since it turns on the date of the last face-to-face service.
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