ICD-10 B44.81
Billable / Specific HCC v28: 112 CCAllergic bronchopulmonary aspergillosis
About ICD-10-CM B44.81
ICD-10-CM code B44.81 represents Allergic bronchopulmonary aspergillosis. This is a billable/specific code in the Infectious and Parasitic Diseases chapter (block B44). The 2026 edition of ICD-10-CM B44.81 became effective on October 1, 2025.
Coding Tips for B44.81
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
B44.81 is a CMS-HCC v28 risk-adjustment code (category 112). To count for the patient Risk Adjustment Factor (RAF), document the diagnosis with MEAT language each calendar year: Monitored, Evaluated, Assessed, Treated. A diagnosis on the problem list alone does not satisfy CMS RADV audit standards. Include the diagnosis in the assessment with current status and current treatment plan.
B44.81 is designated CC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-CC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag CC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Medicare Advantage HCC Impact
Capture this diagnosis annually for accurate risk adjustment. Missed HCC captures are the #1 revenue leak in Medicare Advantage risk programs.
Inpatient DRG Impact, CC
codes Allergic bronchopulmonary aspergillosis. As a Complication/Comorbidity (CC), this contributes to DRG severity adjustment when documented alongside the principal diagnosis.
Medicare LCD Coverage for B44.81
Local Coverage Determinations (LCDs) from CMS MACs that list B44.81 as a covered diagnosis.
Showing top 10 of 215 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing B44.81.
1 Aetna
5 Medicare
CPT Codes Commonly Billed with B44.81
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 93319 CMS LCD: Billing and Coding: Echocardiography CMS LCD
- 93307 CMS LCD: Billing and Coding: Echocardiography CMS LCD
- 93351 CMS LCD: Billing and Coding: Echocardiography CMS LCD
- 93355 CMS LCD: Billing and Coding: Echocardiography CMS LCD
- J1250 CMS LCD: Billing and Coding: Echocardiography CMS LCD
- 93304 CMS LCD: Billing and Coding: Echocardiography CMS LCD
- 93352 CMS LCD: Billing and Coding: Echocardiography CMS LCD
- J0280 CMS LCD: Billing and Coding: Echocardiography CMS LCD
- 93318 CMS LCD: Billing and Coding: Echocardiography CMS LCD
- 93308 CMS LCD: Billing and Coding: Echocardiography CMS LCD
Convert B44.81 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| B44.81 | 5186 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To B44.81
Other codes in section B35-B49 (Mycoses).
ICD-10 B44.81, Billing FAQ
Is ICD-10 code B44.81 billable? +
Yes, B44.81 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
Does B44.81 affect Medicare Advantage HCC risk adjustment? +
Yes. B44.81 maps to CMS-HCC v28 category 112. Capture this diagnosis annually for accurate Medicare Advantage risk score.
Is B44.81 a CC or MCC for inpatient DRG? +
Yes, this code is designated as CC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What CPT codes are commonly billed with B44.81? +
Procedures frequently paired with B44.81 include: 93319, 93307, 93351, 93355, J1250.
What ICD-9 codes does B44.81 map to? +
Per CMS GEMs, B44.81 maps to ICD-9 codes: 5186. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on July 16, 2026.
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