2027 ICD-10-CM Diagnosis Code B38.4Coccidioidomycosis meningitis
ICD-10-CM Codes›A00–B99›B35-B49›B38
- Billable — Valid for Submission
- MCC — Major Complication or Comorbidity
- Not Chronic
B38.4 is a billable ICD-10-CM diagnosis code for coccidioidomycosis meningitis. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 23 through 24, 97 through 99, 791, 793, 974 through 976. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 49 closely related codes. Coders also document this condition as coccidioidal meningitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Fungal infections and Meningitis.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Coccidioidal meningitis
- Coccidioides infection of the central nervous system
- Fungal meningitis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to B38.4: its own notes plus those printed at block B35-B49 and Chapter 1. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- diseases generally recognized as communicable or transmissible
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may 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)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify resistance to antimicrobial drugs (Z16.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name B38.4, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
meninges B38.4
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Coccidioidomycosis
infection with a fungus of the genus coccidioides, endemic to the southwestern united states. it is sometimes called valley fever but should not be confused with rift valley fever. infection is caused by inhalation of airborne, fungal particles known as arthroconidia, a form of fungal spores. a primary form is an acute, benign, self-limited respiratory infection. a secondary form is a virulent, severe, chronic, progressive granulomatous disease with systemic involvement. it can be detected by use of coccidioidin.
Patient EducationClinical
Meningitis
Meningitis is inflammation of the thin tissue that surrounds the brain and spinal cord, called the meninges. There are several types of meningitis. The most common is viral meningitis. You get it when a virus enters the body through the nose or mouth and travels to the brain. Bacterial meningitis is rare but can be deadly.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert B38.4 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B38.4Overview
What is the ICD-10 code for coccidioidomycosis meningitis?
The ICD-10-CM code for coccidioidomycosis meningitis is B38.4 (sometimes written as B384). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is B38.4 (Coccidioidomycosis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report coccidioidomycosis meningitis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does B38.4 group to?
When coccidioidomycosis meningitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 24, 98, 974, 976, 99, 975, 23, 97, with relative weights from 0.7879 to 5.7422 depending on complications. Higher weights mean higher Medicare reimbursement.
Is B38.4 a CC or MCC?
CMS lists B38.4 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 49 closely related codes in its exclusion list.
What is the ICD-9 equivalent of B38.4?
Under the General Equivalence Mappings, coccidioidomycosis meningitis converts to ICD-9-CM 114.2 (coccidioidal meningitis). The mapping is a direct match.
