B39.2 — Pulmonary histoplasmosis capsulati, unspecified
Is B39.2 billable?
Yes, but B39.2 is an unspecified code. B39.2 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, B39.2 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting B39.2 — the more specific alternatives are listed below.
B39.2 at a glance
| Code | B39.2 |
|---|---|
| Description | Pulmonary histoplasmosis capsulati, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does B39.2 group to?
B39.2 sits in MDC 04 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 177Respiratory Infections and Inflammations with MCCmedical
- 178Respiratory Infections and Inflammations with CCmedical
- 179Respiratory Infections and Inflammations without CC/MCCmedical
As a secondary diagnosis, B39.2 is a major complication or comorbidity (MCC), which can move a stay into a higher-paying DRG.
How is B39.2 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to B39.2. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Histoplasmosis › with pneumonia NEC
- Histoplasmosis › lung NEC
- Histoplasmosis › capsulati › pulmonary
- Pneumonia › in › histoplasmosis (acute) (double) (migratory) (purulent) (septic) (unresolved)
Code first — inherited from B39
The underlying condition below must be sequenced before B39.2. B39.2 describes a manifestation and cannot be the principal or first-listed diagnosis.
- associated AIDS (B20)
Use additional code — inherited from Chapter 1
Report an additional code alongside B39.2 to fully describe the condition. B39.2 is sequenced first.
- code to identify resistance to antimicrobial drugs (Z16.-)
Use additional code — inherited from B39
Report an additional code alongside B39.2 to fully describe the condition. B39.2 is sequenced first.
Excludes2 — not included here — inherited from Chapter 1
The conditions below are not part of B39.2, but a patient may have both at the same time. When documentation supports it, B39.2 and the excluded code may both be reported.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Excludes2 — not included here — inherited from B35-B49
The conditions below are not part of B39.2, but a patient may have both at the same time. When documentation supports it, B39.2 and the excluded code may both be reported.
How long has B39.2 existed?
B39.2 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with B39.2?
ICD-10-CM declares these codes mutually exclusive with B39.2 — exactly one of each pair can be correct for a given encounter.