M86.42 – Chronic osteomyelitis with draining sinus, humerus
ICD-10-CM 2027 diagnosis code · Other osteopathies
ICD-10-CM code
M86.42
- Code
M86.42(claims format:M8642)- Description
- Chronic osteomyelitis with draining sinus, humerus
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
- Block
- M86-M90 Other osteopathies
- Parent codes
- M86 › M86.4
Billable codes under M86.42
M86.42 is a header code and cannot be used on claims. Choose the most specific code:
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M86 – Osteomyelitis
Excludes1 (not coded here):
Use additional code:
Block M86-M90
Excludes1 (not coded here):
- postprocedural osteopathies (M96.-)
Index terms for M86.42
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in M86.4
- M86.40 – Chronic osteomyelitis with draining sinus, unspecified siteBillable
- M86.41 – Chronic osteomyelitis with draining sinus, shoulderHeader
- M86.43 – Chronic osteomyelitis with draining sinus, radius and ulnaHeader
- M86.44 – Chronic osteomyelitis with draining sinus, handHeader
- M86.45 – Chronic osteomyelitis with draining sinus, femurHeader
- M86.46 – Chronic osteomyelitis with draining sinus, tibia and fibulaHeader
- M86.47 – Chronic osteomyelitis with draining sinus, ankle and footHeader
- M86.48 – Chronic osteomyelitis with draining sinus, other siteBillable
- M86.49 – Chronic osteomyelitis with draining sinus, multiple sitesBillable
Frequently asked questions
What is ICD-10 code M86.42?
M86.42 is the ICD-10-CM code for chronic osteomyelitis with draining sinus, humerus, in the block M86-M90 (Other osteopathies).
Is M86.42 a billable code?
No. M86.42 is a header code with more specific child codes; report one of the billable codes listed above.
What category does M86.42 belong to?
It belongs to category M86 – Osteomyelitis.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.