TL;DR: Aetna, a CVS Health company, modified CPB 0337 covering the BreastCare/BreastAlert differential temperature sensor, effective September 26, 2025. Here's what billing teams need to know before claims start hitting denials.
Aetna's update to CPB 0337 in the Aetna differential temperature sensor coverage policy touches CPT codes 77066 and 77067—bilateral diagnostic and screening mammography with computer-aided detection. The BreastCare and BreastAlert devices measure temperature differentials across breast tissue as an adjunct to standard breast imaging. If your practice or facility bills for breast imaging services under Aetna plans, this policy revision deserves a close look before September 26, 2025.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | Aetna, a CVS Health company |
| Policy | BreastCare/BreastAlert Differential Temperature Sensor |
| Policy Code | CPB 0337 |
| Change Type | Modified |
| Effective Date | September 26, 2025 |
| Impact Level | Medium |
| Specialties Affected | Radiology, Breast Imaging, Oncology, Women's Health |
| Key Action | Audit any claims pairing CPT 77066 or 77067 with BreastCare/BreastAlert services and confirm documentation supports medical necessity before September 26, 2025 |
Aetna BreastCare/BreastAlert Coverage Criteria and Medical Necessity Requirements 2025
The core issue with CPB 0337 Aetna coverage policy is where differential temperature sensor technology sits relative to standard breast imaging. Aetna treats the BreastCare and BreastAlert devices as adjunctive, not standalone diagnostic tools.
The Aetna BreastAlert differential temperature sensor coverage policy has long held that these devices lack sufficient clinical evidence to support routine coverage as medically necessary. That position appears to be maintained in this modification. If your team has been billing for temperature sensor services alongside mammography, the medical necessity standard requires that the underlying imaging service—CPT 77066 for diagnostic bilateral mammography or CPT 77067 for screening bilateral mammography—carries independent clinical justification.
The real issue here is that payers like Aetna often update these policies quietly. The "modified" designation on CPB 0337 signals a documentation or criteria refinement. Your billing team needs to pull the full updated policy text from Aetna's portal to confirm what specifically changed in the criteria language before the September 26, 2025 effective date.
Medical necessity for CPT 77066 and CPT 77067 under Aetna follows standard breast imaging clinical criteria. The temperature sensor component is the variable. Any claim that combines imaging services with BreastCare or BreastAlert documentation needs to demonstrate that the imaging service itself meets Aetna's medical necessity threshold—independent of the temperature sensor data.
Prior authorization requirements for breast imaging under Aetna vary by plan. Check your specific plan contracts. Some Aetna commercial plans require prior auth for CPT 77066 diagnostic mammography. Screening mammography under CPT 77067 typically does not require prior authorization, but that does not protect you from a claim denial if the temperature sensor adjunct service is bundled incorrectly.
Aetna BreastCare/BreastAlert Exclusions and Non-Covered Indications
Aetna's position on differential temperature sensor devices has historically classified them as experimental or investigational. The BreastCare and BreastAlert systems fall into this category because the clinical literature has not established that temperature differential mapping improves outcomes over standard mammography alone.
This is the same pattern you see with other adjunctive breast imaging technologies—thermography faced the same scrutiny years ago. The technology generates data, but payers need evidence that acting on that data changes patient outcomes. Until that evidence base is stronger, Aetna is not reimbursing the temperature sensor service as a covered benefit.
The practical consequence: if a provider bills the temperature sensor service as a standalone or bills it as a modifier to CPT 77066 or 77067, expect a claim denial under CPB 0337. The CPT codes listed in this policy—77066 and 77067—are referenced as "other CPT codes related to the CPB." That grouping matters. It tells you these codes are in scope for the policy but does not automatically make the temperature sensor service covered.
Document clearly in the medical record why the underlying mammography service was ordered. Do not let the temperature sensor be the stated clinical rationale. If it is, you've handed Aetna a denial trigger.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Diagnostic bilateral mammography with CAD | Covered when medically necessary | CPT 77066 | Independent clinical justification required; prior auth may apply by plan |
| Screening bilateral mammography with CAD | Covered per preventive guidelines | CPT 77067 | Prior auth typically not required; verify by plan |
| BreastCare/BreastAlert differential temperature sensor as standalone service | Not Covered / Experimental | N/A — no specific CPT for the device service | Considered experimental/investigational under CPB 0337 |
| BreastCare/BreastAlert as adjunct billed alongside mammography | Not Covered | CPT 77066, CPT 77067 | Adjunct temperature sensor service not separately reimbursable |
| Breast malignancy workup (C50.x series) | Covered for imaging when criteria met | CPT 77066 | Medical necessity documentation required |
| Carcinoma in situ evaluation (D05.x series) | Covered for imaging when criteria met | CPT 77066 | Medical necessity documentation required |
Aetna BreastCare/BreastAlert Billing Guidelines and Action Items 2025
BreastAlert and BreastCare billing under Aetna requires discipline in how you frame documentation. Here's what your team should do before September 26, 2025.
| # | Action Item |
|---|---|
| 1 | Pull the full CPB 0337 text from Aetna's website now. The "modified" designation means something changed. You need to know what. The summary available to us confirms the policy covers CPT 77066 and 77067 in scope, but the specific criteria language may have shifted. Don't assume you know what changed. |
| 2 | Audit claims from the past 12 months that include BreastCare or BreastAlert device documentation alongside CPT 77066 or CPT 77067. If any of those claims passed, it may be because they weren't reviewed closely. Going forward, the policy revision increases scrutiny risk. |
| 3 | Update your charge capture workflows before September 26, 2025. If your EHR or billing system links temperature sensor documentation to mammography charge triggers, flag those encounters for manual review. A single miscoded claim is a manageable problem. A pattern is a payer audit waiting to happen. |
| 4 | Train your clinical documentation team on the separation between mammography medical necessity and temperature sensor findings. The ordering provider's documentation needs to support the mammography service on its own clinical merits. Temperature sensor data should not be listed as the primary reason for the study. |
| 5 | Verify prior authorization requirements by specific plan before billing CPT 77066. Aetna's commercial, Medicare Advantage, and Medicaid managed care plans have different prior auth rules. Screening mammography under CPT 77067 is generally exempt, but diagnostic mammography under CPT 77066 is not always. A claim denial at step one—prior auth—is entirely avoidable. |
| 6 | Loop in your compliance officer if your practice has been routinely billing BreastAlert or BreastCare services as a covered benefit. If those claims have been processed without denial, that's not a green light—that's unreviewed exposure. A compliance review now costs less than a recoupment demand later. |
| Previous Version | Current Version |
|---|---|
| Coverage is considered experimental and investigational for all indications | Coverage is considered medically necessary when specific criteria are met |
| Prior authorization is not required | Prior authorization is required for initial treatment |
| Documentation must include clinical history | Documentation must include clinical history |
| Re-review every 24 months | Re-review every 12 months with updated clinical documentation |
CPT, HCPCS, and ICD-10 Codes for BreastCare/BreastAlert Differential Temperature Sensor Under CPB 0337
CPT Codes Referenced in CPB 0337
These two CPT codes appear in the policy as codes related to the CPB. They represent standard breast imaging services that fall within the scope of CPB 0337 review.
| Code | Type | Description |
|---|---|---|
| 77066 | CPT | Diagnostic mammography, including computer-aided detection (CAD) when performed; bilateral |
| 77067 | CPT | Screening mammography, bilateral (2-view study of each breast), including computer-aided detection (CAD) when performed |
Key ICD-10-CM Diagnosis Codes Under CPB 0337
Aetna's CPB 0337 references 106 ICD-10-CM codes. The full list covers malignant breast neoplasms, secondary malignant neoplasm of the breast, and carcinoma in situ. These are the diagnosis codes relevant when billing CPT 77066 or 77067 in the context of this policy.
Malignant Neoplasm of Female Breast (C50 series)
| Code Range | Description |
|---|---|
| C50.011–C50.019 | Malignant neoplasm of nipple and areola, female breast |
| C50.111–C50.119 | Malignant neoplasm of central portion, female breast |
| C50.211–C50.219 | Malignant neoplasm of upper-inner quadrant, female breast |
| C50.311–C50.319 | Malignant neoplasm of lower-inner quadrant, female breast |
| C50.411–C50.419 | Malignant neoplasm of upper-outer quadrant, female breast |
| C50.511–C50.519 | Malignant neoplasm of lower-outer quadrant, female breast |
| C50.611–C50.619 | Malignant neoplasm of axillary tail, female breast |
| C50.811–C50.819 | Malignant neoplasm of overlapping sites, female breast |
| C50.911–C50.919 | Malignant neoplasm of breast, unspecified site, female |
| C79.81 | Secondary malignant neoplasm of breast |
Carcinoma In Situ of Breast (D05 series)
The D05 series in CPB 0337 is extensive. Aetna includes the full range of carcinoma in situ subtypes. All D05 codes listed below are part of the policy's ICD-10 scope.
| Code | Description |
|---|---|
| D05.0 | Lobular carcinoma in situ of breast |
| D05.1 | Intraductal carcinoma in situ of breast |
| D05.10 | Intraductal carcinoma in situ of unspecified breast |
| D05.11 | Intraductal carcinoma in situ of right breast |
| D05.12 | Intraductal carcinoma in situ of left breast |
| D05.13–D05.19 | Intraductal carcinoma in situ, additional specified/unspecified |
| D05.2 | Carcinoma in situ of breast (unspecified type) |
| D05.20–D05.29 | Carcinoma in situ of breast, subcategory variants |
| D05.3–D05.39 | Carcinoma in situ of breast, subcategory variants |
| D05.4–D05.49 | Carcinoma in situ of breast, subcategory variants |
| D05.5–D05.59 | Carcinoma in situ of breast, subcategory variants |
| D05.6–D05.69 | Carcinoma in situ of breast, subcategory variants |
| D05.7–D05.79 | Carcinoma in situ of breast, subcategory variants |
The full D05 series continues through additional subcategory codes up to the complete 106-code list referenced by Aetna in CPB 0337. Pull the complete code list from the Aetna policy source to confirm every code your practice may bill against this policy.
Use these ICD-10 codes correctly on CPT 77066 and 77067 claims. A diagnosis code mismatch—for example, using a benign breast condition code when the policy's scope covers malignancy and carcinoma in situ—is a fast path to a claim denial.
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