CPT Code 99204 Explained: Cost, Guidelines, and Use Cases

CPT code 99204 is an office or other outpatient evaluation and management (E/M) code used for new patient visits requiring a moderate level of medical decision making or a defined amount of total time. It is typically billed when a provider evaluates multiple problems, manages chronic conditions with progression, or initiates prescription drug management for a new patient. This code is commonly used in primary care and specialty outpatient clinics for higher-complexity new patient consultations.

What Is the Description of CPT Code 99204?

99204 CPT code description according to the American Medical Association 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.”

This descriptor identifies a new-patient office/outpatient visit selected for moderate medical decision making (MDM) or qualifying total time.

How Much Time is Required for CPT Code 99204?

CPT code 99204 requires 45–59 minutes of total time spent on the date of the encounter when billing by time.
Total time includes face-to-face and non-face-to-face work personally performed by the reporting provider on the same calendar date.
Document total minutes or start/stop times to support time-based selection.

What are the Modifiers for CPT Code 99204?

CPT code 99204 may be reported with modifiers to reflect same-day procedures, postoperative status, or telehealth delivery.

Modifier 25: Significant, Separately Identifiable E/M

Modifier 25 is appended when the new-patient E/M is a significant, separately identifiable service on the same day as a procedure. Do not use 25 to bill routine pre/post procedure work.

Modifier 24: Unrelated E/M During Post-Op Period

Modifier 24 is used when the E/M addresses a condition unrelated to a recent surgery during that procedure’s global period. State clearly why the visit is unrelated to the prior surgical global package and link the visit to a different diagnosis.

Modifier 95: Synchronous Telehealth

Modifier 95 is used when the entire CPT code 99204 encounter is delivered via real-time interactive audio-video telehealth. Document patient consent, telehealth platform, and that history/exam/MDM (or time) were completed during the synchronous encounter.

Which Documents Are Required For CPT Code 99204?

Documentation for the CPT code 99204 must support a new-patient visit with moderate MDM or 45 to 59 minutes of total time.

• Comprehensive HPI, ROS, and pertinent past/family/social history when obtained.
• Focused or extended physical exam findings tied to presenting problems.
• Medical decision-making details: number/complexity of problems, data reviewed/ordered, and assessed risk level (show which two or three MDM elements meet “moderate”).
• Orders and results (lab, imaging, EKG) reviewed or ordered during the visit.
• Treatment decisions and management plan (medication starts/changes, procedures ordered, referrals).
• Total time on date of service (or start/stop times) when billing by time.
• Signed provider note, dated entries, and any consent forms if applicable.
• Referral/authorization and any procedure notes if a same-day procedure was performed (to justify or rule out modifier 25).
• Linkage of ICD-10 diagnosis to the documented assessment and plan (medical necessity).

What Are Example Clinical Scenarios or Use Cases for CPT Code 99204?

The code CPT code 99204 is used for new-patient office visits that require moderate medical decision making or 45 to 59 minutes of total time.

Scenario 1: New-onset atrial fibrillation requiring treatment plan and anticoagulation decision

ICD-10: I48.91 (Unspecified atrial fibrillation)

This supports CPT code 99204 because the visit includes arrhythmia evaluation (ECG review), stroke-risk assessment (CHA₂DS₂-VASc), initiation of anticoagulation, and specialty referral, actions meeting moderate MDM.

Scenario 2: Newly referred uncontrolled type 2 diabetes with hyperglycemia and complication risk

ICD-10: E11.65 (Type 2 diabetes mellitus with hyperglycemia)

This supports CPT code 99204 because the visit requires medication initiation or escalation (possible insulin), review of abnormal labs (A1c, BMP), ordering additional testing, and counseling about treatment risks, meeting moderate MDM.

Scenario 3: New patient with unexplained weight loss and gastrointestinal bleeding

ICD-10: R63.4 (Abnormal weight loss). Add K92.2 (Gastrointestinal hemorrhage) as secondary where appropriate.

Multiple new concerning problems requiring diagnostic workup (labs, imaging, endoscopy referral) and coordination of specialty care justify moderate MDM and CPT code 99204.

What is the Cost of CPT Code 99204?

To accurately determine the CPT code 99204 allowed amount, it’s important to evaluate reimbursement across key billing factors.

RVUs & Medicare Payment

CPT code 99204 has a work RVU of 2.60 and a total RVU of 3.56. Applying the CY-2026 nonqualifying conversion factor ($33.40) to 3.56 total RVUs yields a national non-facility Medicare payment of roughly $118 to $120. Local GPCI adjustments change the final allowed amount.

Commercial Payers

Commercial allowed amounts vary due to typical contracted rates for CPT code 99204 commonly falling between about $150 and $300, depending on insurer, contract, and local market. Many commercial contracts pay a multiple of Medicare, commonly 120% to 250%.

Place-of-Service & Geographic Adjustments

Place of service and Geographic Practice Cost Indices (GPCIs) materially affect payment. Non-facility (office) payments are generally higher than facility physician payments, and high-cost urban localities can increase payments substantially.

What Are the CPT Code 99204 Rules To Ensure Successful Reimbursement?

Follow documentation, NCCI/bundling rules, correct unit/frequency limits, and payer policy to support a 99204 payment. Understanding the CPT code meaning helps ensure that the procedure is reported accurately and reimbursed according to standardized medical billing practices.

Bundling / NCCI / Same-Day Procedure Rules

Do not bill 99204 separately when the E/M is included in a global or bundled procedure payment. Append modifier 25 only when the E/M is truly separate and documented.

Check NCCI edits and global surgery rules before submitting. Use modifier 59 (or the appropriate NCCI modifier like XE/XU) only when documentation justifies a separate anatomic or service-level distinction.

Units, MUEs & E/M Frequency Rules

Bill one unit of 99204 per date of service and respect the payer MUEs and frequency edits. If billing by time, document the total minutes (45 to 59 minutes) on the encounter date. Most payers and MUE lists limit E/M codes to a single unit per patient per date.

Top Reasons For Denials Specific To 99204 & Quick Remedies

• Downcoded for Insufficient MDM/Time: Update the note to clearly document problem complexity, data reviewed/ordered (labs/imaging/records), risk level, and/or total time (45 to 59 minutes) to support moderate MDM.
• Denied as Bundled With A Same-Day Procedure: Submit documentation showing a separately identifiable E/M (distinct history/exam/assessment) and explain how it was separate from the procedure.
• Patient Not Qualifying As “New” (99204 Billed Incorrectly): Confirm no professional services were provided by the same physician or same-specialty group within 3 years.
• Duplicate E/M / Multiple Visits On Same Date Denied: Document separate clinical reasons and distinct providers/specialties, or combine into the single highest-supported E/M code and resubmit with supporting notes.