CPT 99408
Global XXXAudit/dast 15-30 min
CPT 99408 Billing & Documentation Guide
CPT code 99408 (Audit/dast 15-30 min) is classified under E/M with a global period indicator of XXX. The 2026 Medicare Physician Fee Schedule assigns a work RVU of 0.65, a non-facility practice expense RVU of 0.36, and a malpractice RVU of 0.04, a total non-facility RVU of 1.05 and facility RVU of 0.83. With the current conversion factor of $33.4009, the national average non-facility reimbursement is approximately $35.85, though rates vary from $32.73 to $46.11 based on MAC locality and Geographic Practice Cost Indices (GPCIs).
When billing 99408, ensure documentation supports medical necessity and the specific components required for the code's level of service. For E/M codes, document MDM (medical decision-making) elements: problems addressed, data reviewed, and risk. For procedural codes, document the indication, technique, and any complications. Always verify NCCI edits before bundling 99408 with related codes; this code has 10 PTP bundling relationships on file (see table below).
Payment Status & Global Period
Non-covered service
No global period (E/M and other non-procedural services)
MUE Limit (Medically Unlikely Edits)
Submitting more than 0 units of 99408 for the same patient on the same date triggers automatic line denial unless an appropriate modifier and supporting documentation justify the higher quantity.
RVU Breakdown, CPT 99408
| Component | Non-Facility | Facility |
|---|---|---|
| Work RVU | 0.65 | 0.65 |
| Practice Expense RVU | 0.36 | 0.14 |
| Malpractice RVU | 0.04 | 0.04 |
| Total RVU | 1.05 | 0.83 |
| Conversion Factor | $33.4009 | |
2026 Medicare Reimbursement by State, CPT 99408
State-level averages across all MAC localities. Non-facility rates typically apply to office-based services; facility rates apply to hospital outpatient / inpatient.
| State | Non-Facility | Facility | Range (Non-Fac) | Localities |
|---|---|---|---|---|
| California | $37.44 | $28.75 | $35.97 - $42.15 | 29 |
| Florida | $36.38 | $29 | $35.21 - $37.61 | 3 |
| Georgia | $34.82 | $27.8 | $34.03 - $35.6 | 2 |
| Illinois | $35.96 | $28.86 | $34.78 - $37.01 | 4 |
| Michigan | $34.89 | $27.99 | $34.2 - $35.57 | 2 |
| North Carolina | $33.78 | $26.93 | $33.78 - $33.78 | 1 |
| New York | $37.97 | $29.77 | $34.07 - $39.88 | 5 |
| Ohio | $34.04 | $27.33 | $34.04 - $34.04 | 1 |
| Pennsylvania | $35.11 | $27.92 | $34.01 - $36.21 | 2 |
| Texas | $34.91 | $27.68 | $33.89 - $35.66 | 8 |
Source: CMS PFSRVU 2026 · Updated 2026-04-01. Full locality-level detail available for all 53 states, contact us for custom reports.
NCCI Bundling Edits, CPT 99408
Procedure-to-procedure (PTP) edits. If you bill any of these codes with 99408 on the same date of service, review the modifier indicator and payer policy before submission.
| Partner Code | Relationship | Modifier Allowed | Rationale |
|---|---|---|---|
| 0359T | Column 1 (primary), can be billed with modifier | Yes | Misuse of Column Two code with Column One code |
| 0360T | Column 1 (primary), can be billed with modifier | Yes | Misuse of Column Two code with Column One code |
| 0361T | Column 1 (primary), can be billed with modifier | Yes | Misuse of Column Two code with Column One code |
| 0362T | Column 1 (primary), can be billed with modifier | Yes | Misuse of Column Two code with Column One code |
| 0363T | Column 1 (primary), can be billed with modifier | Yes | Misuse of Column Two code with Column One code |
| 0364T | Column 1 (primary), can be billed with modifier | Yes | Misuse of Column Two code with Column One code |
| 0365T | Column 1 (primary), can be billed with modifier | Yes | Misuse of Column Two code with Column One code |
| 0366T | Column 1 (primary), can be billed with modifier | Yes | Misuse of Column Two code with Column One code |
| 0367T | Column 1 (primary), can be billed with modifier | Yes | Misuse of Column Two code with Column One code |
| 0368T | Column 1 (primary), can be billed with modifier | Yes | Misuse of Column Two code with Column One code |
Frequently Asked Questions, CPT 99408
What does CPT code 99408 mean? +
CPT code 99408 represents: Audit/dast 15-30 min. It's in the E/M category with a global period of XXX.
What is the Medicare reimbursement for CPT 99408? +
The 2026 Medicare national average non-facility payment for CPT 99408 is $35.85. Rates range from $32.73 to $46.11 across 53 states depending on MAC locality and GPCIs.
What modifiers can I use with CPT 99408? +
E/M codes commonly use modifier 25 (significant separately identifiable E/M on same day as a procedure), 57 (decision for major surgery), 24 (unrelated E/M during global period), 95 (synchronous audio+video telehealth), 93 (audio-only telehealth), and AI (principal physician of record on admission). Surgical modifiers like 50, 51, 59 do not apply to E/M.
What bundling edits apply to CPT 99408? +
This code has 10 NCCI PTP bundling relationships. See the NCCI Bundling section below for full list.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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