CPT 77066
Global XXX ActiveDx mammo incl cad bi
CPT 77066 Billing & Documentation Guide
CPT code 77066 (Dx mammo incl cad bi) is classified under Radiology with a global period indicator of XXX. The 2026 Medicare Physician Fee Schedule assigns a work RVU of 0.98, a non-facility practice expense RVU of 3.64, and a malpractice RVU of 0.08, a total non-facility RVU of 4.7 and facility RVU of 4.7. With the current conversion factor of $33.4009, the national average non-facility reimbursement is approximately $162.57, though rates vary from $138.55 to $213.08 based on MAC locality and Geographic Practice Cost Indices (GPCIs).
When billing 77066, 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 77066 with related codes; this code has 10 PTP bundling relationships on file (see table below).
Payment Status & Global Period
Active code (paid under MPFS)
No global period (E/M and other non-procedural services)
MUE Limit (Medically Unlikely Edits)
Submitting more than 1 units of 77066 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 77066
| Component | Non-Facility | Facility |
|---|---|---|
| Work RVU | 0.98 | 0.98 |
| Practice Expense RVU | 3.64 | 3.64 |
| Malpractice RVU | 0.08 | 0.08 |
| Total RVU | 4.7 | 4.7 |
| Conversion Factor | $33.4009 | |
2026 Medicare Reimbursement by State, CPT 77066
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 | $179.22 | $179.22 | $167.97 - $213.08 | 29 |
| Florida | $159.92 | $159.92 | $152.98 - $166.05 | 3 |
| Georgia | $151.97 | $151.97 | $144.37 - $159.56 | 2 |
| Illinois | $155.43 | $155.43 | $147.91 - $162.56 | 4 |
| Michigan | $150.66 | $150.66 | $146.75 - $154.56 | 2 |
| North Carolina | $147.87 | $147.87 | $147.87 - $147.87 | 1 |
| New York | $173.55 | $173.55 | $150.11 - $184.35 | 5 |
| Ohio | $146.43 | $146.43 | $146.43 - $146.43 | 1 |
| Pennsylvania | $154.97 | $154.97 | $146.87 - $163.07 | 2 |
| Texas | $155.09 | $155.09 | $145.85 - $163.8 | 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 77066
Procedure-to-procedure (PTP) edits. If you bill any of these codes with 77066 on the same date of service, review the modifier indicator and payer policy before submission.
| Partner Code | Relationship | Modifier Allowed | Rationale |
|---|---|---|---|
| 36591 | Column 1 (primary), can be billed with modifier | No | CPT Manual or CMS manual coding instruction |
| 36592 | Column 1 (primary), can be billed with modifier | No | CPT Manual or CMS manual coding instruction |
| 77063 | Column 1 (primary), can be billed with modifier | Yes | CPT Manual or CMS manual coding instruction |
| 77065 | Column 1 (primary), can be billed with modifier | No | HCPCS/CPT procedure code definition |
| 77067 | Column 1 (primary), can be billed with modifier | Yes | Misuse of Column Two code with Column One code |
| 96523 | Column 1 (primary), can be billed with modifier | No | CPT Manual or CMS manual coding instruction |
| G0202 | Column 1 (primary), can be billed with modifier | Yes | Misuse of Column Two code with Column One code |
| G0206 | Column 1 (primary), can be billed with modifier | No | Misuse of Column Two code with Column One code |
| 19281 | Column 2 (secondary), bundled into primary | Yes | HCPCS/CPT procedure code definition |
| 19282 | Column 2 (secondary), bundled into primary | Yes | HCPCS/CPT procedure code definition |
Frequently Asked Questions, CPT 77066
What does CPT code 77066 mean? +
CPT code 77066 represents: Dx mammo incl cad bi. It's in the Radiology category with a global period of XXX.
What is the Medicare reimbursement for CPT 77066? +
The 2026 Medicare national average non-facility payment for CPT 77066 is $162.57. Rates range from $138.55 to $213.08 across 53 states depending on MAC locality and GPCIs.
What modifiers can I use with CPT 77066? +
Radiology codes rely heavily on the professional/technical split: modifier 26 (professional component only) and TC (technical component only). Also common: 50 (bilateral imaging), 76 (repeat by same physician), 77 (repeat by different physician), and LT/RT for laterality.
What bundling edits apply to CPT 77066? +
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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