TL;DR: Aetna modified CPB 1087 governing anacaulase-bcdb (Nexobrid) coverage, effective December 4, 2025. Billing teams using CPT codes 0973T–0976T and HCPCS J7353 need to verify BSA limits, exclusion criteria, and second-application rules before submitting claims.
Aetna updated its anacaulase-bcdb (Nexobrid) coverage policy under CPB 1087 to clarify medical necessity criteria for enzymatic eschar removal in burn patients. The policy covers selective enzymatic debridement billed under CPT 0973T, 0974T, 0975T, and 0976T, with the drug itself billed as HCPCS J7353. If your team bills these codes for burn care patients on Aetna commercial plans, the criteria in this update determine whether your claims pay or deny.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | Aetna |
| Policy | Anacaulase-bcdb (Nexobrid) — CPB 1087 |
| Policy Code | CPB 1087 |
| Change Type | Modified |
| Effective Date | December 4, 2025 |
| Impact Level | High |
| Specialties Affected | Burn surgery, plastic surgery, wound care |
| Key Action | Confirm BSA percentage, patient age, and exclusion criteria are documented before billing J7353 or 0973T–0976T |
Aetna Anacaulase-bcdb Coverage Criteria and Medical Necessity Requirements 2025
The Aetna anacaulase-bcdb coverage policy covers Nexobrid for eschar removal in adult and pediatric members with deep partial thickness and/or full thickness thermal burns. Two layers of criteria apply: the member must meet the positive criteria, and must not fall into any exclusion.
Positive Criteria: What Gets Approved
Medical necessity requires thermal burns — not chemical or electrical burns. The member must have deep partial thickness and/or full thickness wounds. A burn specialist or plastic surgeon must prescribe or be consulted on the case. This is a hard prescriber requirement, not a soft recommendation. Claims without documentation of burn specialist or plastic surgeon involvement will face claim denial.
BSA limits are the trickiest part of this coverage policy. Here's how they break down:
| # | Covered Indication |
|---|---|
| 1 | Adults and pediatric members age 6 and older: Up to 15% BSA per application |
| 2 | Pediatric members under age 6: Up to 10% BSA per application |
| 3 | Total treated area per treatment course: Cannot exceed 20% BSA for either application combined |
A second application is allowed for adults when clinically indicated. It must happen within 24 hours of the first application — meaning the next calendar day. Three scenarios justify a second application: the wound area exceeds 15% BSA, multiple wound areas on different body surfaces require different body positioning, or the first application didn't fully remove eschar. Document the specific reason. Aetna will want to see it.
Second applications are not recommended for pediatric members. Don't bill a second application session for a pediatric patient expecting prior authorization approval.
Each application must be removed after four hours. That's a clinical requirement built into the policy, and it affects your documentation — the medical record should reflect the four-hour window.
For continuation of therapy — meaning a new treatment course for a new wound or new wound area — the member must meet all initial approval criteria again. If your team manages long-term burn patients with multiple wound sites over time, treat each new course as a fresh prior authorization request.
Prior authorization is not explicitly mentioned as a step-by-step process in this policy, but coverage criteria this specific always function as de facto prior auth checkpoints. Build a checklist around these criteria and verify medical necessity documentation before submitting claims for J7353 or any of the 0973T–0976T codes.
Aetna Anacaulase-bcdb Exclusions and Non-Covered Indications
Eight exclusions block coverage entirely. Any one of them disqualifies the member. This list is where most claim denials will come from if your clinical team isn't reviewing it pre-treatment.
| # | Excluded Procedure |
|---|---|
| 1 | Chemical or electrical burns — Nexobrid covers thermal burns only. Chemical and electrical burns are excluded. |
| 2 | Burns to the face, perineum, or genitalia — No coverage for treatment in these locations. |
| 3 | Diabetic patients with foot burns — If the member has diabetes mellitus (ICD-10 codes E08.00–E13.9) or occlusive vascular disease and the burn is on the foot, they're excluded. |
| 4 | Circumferential burns — Explicitly excluded. HCPCS J7353's descriptor itself notes this exclusion. |
| 5 | Significant cardiopulmonary disease, including inhalation injury — This is broad. Patients with acute MI (I21.01–I21.A9), pulmonary embolism (I26.x), or chronic ischemic heart disease (I25.10–I25.9) are in the excluded pool. Flag these ICD-10 codes during chart review. |
| 6 | Wounds contaminated with radioactive or hazardous substances — Excluded due to risk of spreading the substance during eschar removal. |
| 7 | Burns near implants, pacemakers, shunts, or large vessels — Any wound where eschar removal could expose a medical device or vital structure is excluded. |
| 8 | Known hypersensitivity to bromelain, pineapples, papayas, or papain — Allergy documentation matters here — the exclusion covers bromelain, pineapples, papayas, and papain. |
The real issue with these exclusions is that several require clinical information your billing team may not see automatically. Foot burns with diabetes, cardiac comorbidities, implant proximity — these come from the clinical chart. Build a pre-authorization clinical checklist that pulls this information before the case is billed.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Deep partial/full thickness thermal burns — adult, BSA ≤15% per session | Covered | 0973T–0976T, J7353 | Burn specialist or plastic surgeon must prescribe or consult |
| Deep partial/full thickness thermal burns — peds age 6+, BSA ≤15% per session | Covered | 0973T–0976T, J7353 | Max 20% BSA total per treatment course |
| Deep partial/full thickness thermal burns — peds under age 6, BSA ≤10% per session | Covered | 0973T–0976T, J7353 | Max 20% BSA total per treatment course |
| Second application for adults (same or new area, next calendar day) | Covered when criteria met | 0973T–0976T, J7353 | One of three clinical justifications required; not for peds |
| New wound/new wound area — continuation of therapy | Covered | 0973T–0976T, J7353 | Must re-meet all initial criteria for each new treatment course |
| Chemical or electrical burns | Not Covered | J7353 | Explicit exclusion |
| Burns to face, perineum, or genitalia | Not Covered | J7353 | Explicit exclusion |
| Circumferential burns | Not Covered | J7353 | Noted in J7353 descriptor |
| Foot burns with diabetes mellitus or occlusive vascular disease | Not Covered | J7353 | ICD-10 E08.00–E13.9 triggers exclusion review |
| Burns near implants, pacemakers, shunts, or large vessels | Not Covered | J7353 | Excluded due to exposure risk during debridement |
| Burns in patients with significant cardiopulmonary disease or inhalation injury | Not Covered | J7353 | Broad exclusion — review cardiac/pulmonary comorbidities |
| Burns in patients with hypersensitivity to bromelain/pineapple/papain | Not Covered | J7353 | Document allergy status pre-treatment |
| Burns contaminated with radioactive or hazardous substances | Not Covered | J7353 | Safety-based exclusion |
Aetna Anacaulase-bcdb Billing Guidelines and Action Items 2025
These are the steps your billing and clinical teams need to complete. Build them into your workflow before December 4, 2025.
| # | Action Item |
|---|---|
| 1 | Update your charge capture to flag J7353 and CPT 0973T–0976T for eligibility review. Every claim for these codes on an Aetna commercial plan should trigger a documentation checklist before submission. |
| 2 | Create a pre-authorization checklist that screens for all eight exclusions. The checklist should pull burn location, burn type (thermal only), wound proximity to implants or vessels, and cardiac/diabetic comorbidities from the chart. Don't rely on billing staff to catch these — it has to happen at the clinical level. |
| 3 | Verify BSA documentation is in the chart before billing. Accurate documentation of these criteria is the difference between clean reimbursement and a denial that requires appeal. The percentage of BSA treated per session must be clearly noted. For pediatric patients under age 6, that limit is 10% BSA. For all others, it's 15%. Total course cannot exceed 20%. |
| 4 | For any second application claim on an adult, confirm the date sequence. The second application must occur the next calendar day from the first. A two-day gap kills coverage. Document the specific clinical reason for the second application — one of the three criteria must be clearly noted. |
| 5 | Confirm the prescriber is a burn specialist or plastic surgeon. If the prescribing physician is neither, the claim needs a documented consultation with one of those specialists. This is a hard requirement, not a documentation preference. Missing this is a straightforward claim denial. |
| 6 | Flag diabetic patients with foot burns before treatment starts. These patients are excluded. ICD-10 codes in the E08.00–E13.9 range combined with foot burn codes should auto-flag in your EHR or billing system as an exclusion trigger. |
| 7 | For continuation of therapy claims, treat each new treatment course as a new prior auth event. Aetna requires that all initial medical necessity criteria are re-met for new wounds or new wound areas. Don't assume prior approvals carry over. |
If your burn center treats high volumes of these cases and you're uncertain how your specific payer mix maps to these criteria, talk to your compliance officer before December 4, 2025. The BSA calculation rules and second-application restrictions have enough nuance that a pre-implementation audit is worth the time.
| 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 Anacaulase-bcdb Enzymatic Debridement Under CPB 1087
Covered CPT Codes (When Selection Criteria Are Met)
| Code | Type | Description |
|---|---|---|
| 0973T | CPT | Selective enzymatic debridement, partial-thickness and/or full-thickness burn eschar, requiring anesthesia |
| 0974T | CPT | Selective enzymatic debridement, partial-thickness and/or full-thickness burn eschar, requiring anesthesia |
| 0975T | CPT | Selective enzymatic debridement, partial-thickness and/or full-thickness burn eschar, requiring anesthesia |
| 0976T | CPT | Selective enzymatic debridement, partial-thickness and/or full-thickness burn eschar, requiring anesthesia |
Note: The policy groups 0973T–0976T as "other CPT codes related to the CPB." The covered drug billing goes through HCPCS J7353. Your anacaulase-bcdb billing should use J7353 for the drug and the appropriate 0973T–0976T code for the procedure — confirm with your facility's charge description master how these are mapped.
HCPCS Drug Codes
| Code | Type | Description |
|---|---|---|
| J7353 | HCPCS | Anacaulase-bcdb, 8.8% gel, 1 gram — covered when selection criteria are met; not covered for circumferential burns, burn wounds where medical devices or vital structures could be exposed |
The J7353 descriptor itself encodes two of the exclusions. Payers may auto-deny J7353 claims that carry ICD-10 codes signaling circumferential burns or implant proximity. Make sure your ICD-10 coding is precise.
Key ICD-10-CM Diagnosis Codes
These codes appear in the policy's 516-code ICD-10 list. The ones most relevant to exclusion screening are:
| Code Range | Description | Relevance |
|---|---|---|
| E08.00–E13.9 | Diabetes mellitus | Exclusion trigger for foot burns |
| I21.01–I21.A9 | Acute myocardial infarction | Cardiopulmonary exclusion |
| I22.0–I22.9 | Subsequent ST elevation and non-ST elevation MI | Cardiopulmonary exclusion |
| I24.0–I24.9 | Other acute ischemic heart diseases | Cardiopulmonary exclusion |
| I25.10–I25.9 | Chronic ischemic heart disease | Cardiopulmonary exclusion |
| I26.1–I26.5x (per visible source excerpt; full range subject to complete 516-code policy list) | Pulmonary embolism | Cardiopulmonary exclusion |
The full ICD-10 list covers 516 codes. The cardiac and pulmonary codes are the most operationally important — they define the "significant cardiopulmonary disease" exclusion that can block coverage for burn patients with complex medical histories. Build these ranges into your exclusion screening logic.
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