ICD-10 J84.10
Billable / Specific HCC v28: 112Pulmonary fibrosis, unspecified
About ICD-10-CM J84.10
ICD-10-CM code J84.10 represents Pulmonary fibrosis, unspecified. This is a billable/specific code in the Respiratory System chapter (block J84). The 2026 edition of ICD-10-CM J84.10 became effective on October 1, 2025.
Coding Tips for J84.10
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
J84.10 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.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under J84.10. Per CMS ICD-10-CM Tabular 2026.
- Capillary fibrosis of lung
- Cirrhosis of lung (chronic) NOS
- Fibrosis of lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial) NOS
- Induration of lung (chronic) NOS
- Postinflammatory pulmonary fibrosis
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.
Medicare LCD Coverage for J84.10
Local Coverage Determinations (LCDs) from CMS MACs that list J84.10 as a covered diagnosis.
Showing top 10 of 632 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing J84.10.
3 Aetna
5 Medicare
CPT Codes Commonly Billed with J84.10
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
Convert J84.10 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 |
|---|---|---|
| J84.10 | 515 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To J84.10
Other codes in section J80-J84 (Other respiratory diseases principally affecting the interstitium).
ICD-10 J84.10, Billing FAQ
Is ICD-10 code J84.10 billable? +
Yes, J84.10 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to J84.10? +
ICD-10 J84.10 includes: Capillary fibrosis of lung; Cirrhosis of lung (chronic) NOS; Fibrosis of lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial) NOS, and 2 more clinical synonyms.
Does J84.10 affect Medicare Advantage HCC risk adjustment? +
Yes. J84.10 maps to CMS-HCC v28 category 112. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What CPT codes are commonly billed with J84.10? +
Procedures frequently paired with J84.10 include: 94010, 94729.
What ICD-9 codes does J84.10 map to? +
Per CMS GEMs, J84.10 maps to ICD-9 codes: 515. 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 17, 2026.
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