ICD-10 J84.112
Billable / Specific HCC v28: 112Idiopathic pulmonary fibrosis
About ICD-10-CM J84.112
ICD-10-CM code J84.112 represents Idiopathic pulmonary fibrosis. This is a billable/specific code in the Respiratory System chapter (block J84). The 2026 edition of ICD-10-CM J84.112 became effective on October 1, 2025.
Coding Tips for J84.112
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
J84.112 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 J84.112. Per CMS ICD-10-CM Tabular 2026.
- Cryptogenic fibrosing alveolitis
- Idiopathic fibrosing alveolitis
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 J84.112
Local Coverage Determinations (LCDs) from CMS MACs that list J84.112 as a covered diagnosis.
Showing top 10 of 673 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing J84.112.
5 Medicare
CPT Codes Commonly Billed with J84.112
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Convert J84.112 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 |
|---|---|---|
| J84.112 | 51631 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To J84.112
Other codes in section J80-J84 (Other respiratory diseases principally affecting the interstitium).
ICD-10 J84.112, Billing FAQ
Is ICD-10 code J84.112 billable? +
Yes, J84.112 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 J84.112? +
ICD-10 J84.112 includes: Cryptogenic fibrosing alveolitis; Idiopathic fibrosing alveolitis.
Does J84.112 affect Medicare Advantage HCC risk adjustment? +
Yes. J84.112 maps to CMS-HCC v28 category 112. Capture this diagnosis annually for accurate Medicare Advantage risk score.
What ICD-9 codes does J84.112 map to? +
Per CMS GEMs, J84.112 maps to ICD-9 codes: 51631. 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 June 1, 2026.
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