Office o/p new mod 45 min
CPT code 99204 is billed for a new patient office visit of moderate complexity, typically lasting 45-59 minutes, where the physician evaluates and manages a patient with a moderately severe health problem.
RVU breakdown
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
Billing tips
Use total time on date of encounter as the primary basis for code selection when time exceeds 45 minutes, as it often better supports 99204 than MDM complexity alone
Impact: Increases capture of appropriate level 4 visits by 15-25% versus MDM-only coding; difference of $54.74 between 99204 ($163.35) and 99203 ($108.61)
Document all three elements of moderate complexity MDM: moderate number/complexity of problems, moderate amount/complexity of data reviewed, or moderate risk of complications
Impact: Reduces downcoding risk by auditors; only two of three MDM elements required for 2021+ guidelines, protecting $54.74 differential
Bill non-facility rate ($163.35) when performed in physician office versus facility rate ($129.06) in hospital outpatient departments
Impact: Difference of $34.29 per visit; ensures you receive proper practice expense reimbursement for overhead costs
Separately document time spent on counseling/coordination of care and total visit time to create defensible time-based coding audit trail
Impact: Protects against denials in post-payment audits; Medicare contractors increasingly scrutinize time documentation
Verify new patient status (no professional services from same physician/specialty within past 3 years) before billing 99204 instead of established patient code 99214
Impact: Incorrect patient status is a top denial reason; 99214 pays $145.90 vs 99204 $163.35, but billing 99204 for established patient triggers recoupment
For split/shared visits in facility settings, ensure both physician and NPP document their portions and one provider documents >50% of time or MDM to determine billing provider
Impact: Improper split/shared documentation can result in 100% claim denial; critical for hospital-based practices using care teams
Common denials
Patient does not meet new patient definition (received professional services from same physician or group within past 36 months)
How to appeal: Submit appeals documentation showing patient is truly new (no visits in 3 years), different specialty/subspecialty within group, or different tax ID; if patient is established, rebill as 99214 with corrected claim and refund differential
Insufficient documentation to support moderate complexity MDM or 45+ minutes of total time
How to appeal: Provide complete visit note highlighting two of three MDM elements (problem complexity, data reviewed/ordered, risk level) or time documentation showing total time including pre/post face-to-face activities; cite 2021 E&M guideline changes allowing time OR MDM
Medical necessity not established for level 4 new patient visit versus lower level service
How to appeal: Submit clinical documentation demonstrating medical necessity for comprehensive evaluation (multiple comorbidities, new complex diagnosis, extensive treatment planning); include relevant diagnostic results and treatment plans supporting complexity
Bundled denial when billed same day as procedure without modifier 25
How to appeal: Resubmit claim with modifier 25 appended to 99204 and documentation clearly showing the E&M service was separately identifiable and above/beyond the usual pre/post-procedure work; document different diagnosis or significant additional evaluation
Frequently asked questions
What is the Medicare reimbursement rate for CPT 99204 in 2025?
Medicare pays $163.35 for CPT 99204 in non-facility settings and $129.06 in facility settings for 2025 based on the national average. Actual payment varies by geographic locality based on the Geographic Practice Cost Index (GPCI) adjustments applied to your region.
How long does a 99204 visit need to be?
A 99204 visit requires 45-59 minutes of total time on the date of encounter, including pre-service work (reviewing records, preparing for visit), face-to-face time, and post-service work (documentation, care coordination). Alternatively, you can bill 99204 based on moderate complexity medical decision-making regardless of time spent.
What is the difference between 99204 and 99203?
99204 requires moderate complexity MDM or 45-59 minutes versus 99203 which requires low complexity MDM or 30-44 minutes. The reimbursement difference is $54.74 ($163.35 for 99204 vs $108.61 for 99203). 99204 typically involves more complex problems, more data review, or higher risk management decisions.
Can I bill 99204 for an established patient?
No, 99204 is exclusively for new patients (no professional services from same physician/specialty within past 3 years). For established patients requiring similar complexity/time, use 99214 instead, which pays $145.90 for Medicare. Billing 99204 for established patients will result in claim denials and potential audit flags.
What are the RVUs for CPT code 99204?
CPT 99204 has a total of 5.05 RVUs consisting of 2.6 work RVUs, 2.21 practice expense RVUs (non-facility), 1.15 practice expense RVUs (facility), and 0.24 malpractice RVUs. These are multiplied by the 2025 conversion factor of 32.3465 and locality GPCI to determine payment.
What documentation is required to bill 99204?
You must document either moderate complexity MDM (at least 2 of 3 elements: moderate problem complexity, moderate data reviewed, moderate risk) OR 45-59 minutes total time on date of encounter. Include chief complaint, medically appropriate history/exam, assessment and plan for each problem, and provider signature. Time-based coding requires specific documentation of minutes spent.
Can 99204 be billed via telemedicine?
Yes, 99204 can be billed for telemedicine visits using modifier 95 when conducted via real-time interactive audio and video. Medicare reimburses telemedicine 99204 at the same rate as in-person visits ($163.35 non-facility). The same documentation requirements for time or MDM complexity apply to telemedicine encounters.