ICD-10 J17
Billable / Specific MCCPneumonia in diseases classified elsewhere
About ICD-10-CM J17
ICD-10-CM code J17 represents Pneumonia in diseases classified elsewhere. This is a billable/specific code in the Respiratory System chapter (block J17). The 2026 edition of ICD-10-CM J17 became effective on October 1, 2025.
Coding Tips for J17
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
J17 is designated MCC for MS-DRG grouping. On inpatient claims, this code can shift the DRG to the with-MCC variant when documented as a present-on-admission secondary diagnosis. Hospital CDI programs flag MCC opportunities during chart review. Failure to capture this code may leave 30 to 80 percent of the inpatient stay revenue unrealized.
Type 1 Excludes
Pure excludes, these codes can never be coded together with J17. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- candidial pneumonia (B37.1)
- chlamydial pneumonia (J16.0)
- gonorrheal pneumonia (A54.84)
- histoplasmosis pneumonia (B39.0-B39.2)
- measles pneumonia (B05.2)
- nocardiosis pneumonia (A43.0)
- pneumocystosis (B59)
- pneumonia due to Pneumocystis carinii (B59)
- pneumonia due to Pneumocystis jirovecii (B59)
- pneumonia in actinomycosis (A42.0)
- pneumonia in anthrax (A22.1)
- pneumonia in ascariasis (B77.81)
- pneumonia in aspergillosis (B44.0-B44.1)
- pneumonia in coccidioidomycosis (B38.0-B38.2)
- pneumonia in cytomegalovirus disease (B25.0)
- pneumonia in toxoplasmosis (B58.3)
- rubella pneumonia (B06.81)
- salmonella pneumonia (A02.22)
- spirochetal infection NEC with pneumonia (A69.8)
- tularemia pneumonia (A21.2)
- typhoid fever with pneumonia (A01.03)
- varicella pneumonia (B01.2)
- whooping cough with pneumonia (A37 with fifth-character 1)
Coding Notes
Code Also
- , if applicable, any associated condition such as:
- abscess (J85.1)
- aspiration pneumonia (J69.-)
Code First
- underlying disease, such as:
- Q fever (A78)
- rheumatic fever (I00)
- schistosomiasis (B65.0-B65.9)
Inpatient DRG Impact, MCC
codes Pneumonia in diseases classified elsewhere. As a Major Complication/Comorbidity (MCC), this can shift the DRG assignment to a higher-weighted category, substantial reimbursement impact.
Medicare LCD Coverage for J17
Local Coverage Determinations (LCDs) from CMS MACs that list J17 as a covered diagnosis.
Showing top 10 of 84 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing J17.
1 Cigna
5 Medicare
CPT Codes Commonly Billed with J17
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 J17 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 |
|---|---|---|
| J17 | 4847 | 10000 |
| J17 | 4848 | 10000 |
| J17 | 5171 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To J17
Other codes in section J09-J18 (Influenza and pneumonia).
ICD-10 J17, Billing FAQ
Is ICD-10 code J17 billable? +
Yes, J17 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What codes are Type 1 Excludes for J17? +
Type 1 Excludes (never code together with J17): candidial pneumonia (B37.1); chlamydial pneumonia (J16.0); gonorrheal pneumonia (A54.84)
Is J17 a CC or MCC for inpatient DRG? +
Yes, this code is designated as MCC. Documenting as a secondary diagnosis on inpatient claims can shift the DRG to a higher-weighted category.
What ICD-9 codes does J17 map to? +
Per CMS GEMs, J17 maps to ICD-9 codes: 4847, 4848, 5171. 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 2, 2026.
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