M86.8X80 vs M86.8X81
M86.8X80 (Other osteomyelitis, skull) compared with M86.8X81 (Other osteomyelitis, face and sinuses), from the official CMS tabular data.
Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources
Summary
No tabular note links these codes. Both belong to category M86, and nothing in the tabular list prevents reporting each when it is documented.
Registry fact- What is different?
Title wording.The titles share “Other osteomyelitis”; M86.8X80 says “skull” where M86.8X81 says “face and sinuses”.
Registry fact
- Can these codes be reported together?
No instruction prevents it.No note in either entry names the other. Both belong to category M86; each may be reported when its own documentation is present.
Registry fact
- Is there an Excludes1 relationship?
None.Neither entry carries an Excludes1 note that names the other code. M86.8X80 carries 5 Excludes1 notes and M86.8X81 carries 5 Excludes1 notes covering other codes; the side-by-side table quotes them.
Official rule
- Is there an Excludes2 relationship?
None.Neither entry carries an Excludes2 note that names the other code. M86.8X80 carries 4 Excludes2 notes and M86.8X81 carries 4 Excludes2 notes covering other codes; the side-by-side table quotes them.
Official rule
- Is one more specific?
No.Neither is a subdivision of the other, and neither title is the unspecified form; they describe different conditions within category M86.
Registry fact
- Is one a parent or header code?
No.Both are billable codes, and neither contains the other.
Registry fact
- Are there sequencing instructions?
None.Neither entry carries a Code First or Use Additional Code note that names the other.
Official rule
- Are there other coding relationships?
None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.
MedCoder-derived
Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels
Can these codes be reported together?
Yes, when each is documented. M86.8X80 and M86.8X81 both belong to category M86.
No Excludes1/Excludes2 relationship exists between these codes in the official tabular list. The code titles state what each one covers, and the documentation decides which applies.
Side by side
Similar descriptions do not make codes interchangeable. The documentation and the official instructions decide which code applies.
Other osteomyelitis, skull
Other osteomyelitis, face and sinuses
- osteomyelitis due to:
- echinococcus (B67.2)
- gonococcus (A54.43)
- salmonella (A02.24)
- postprocedural osteopathies (M96.-)
- ostemyelitis of:
- orbit (H05.0-)
- petrous bone (H70.2-)
- vertebra (M46.2-)
- code (B95-B97) to identify infectious agent
- code to identify major osseous defect, if applicable (M89.7-)
M86 Osteomyelitis
M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)
None at this code
- Pott's puffy tumor
No Code first, Code also and 7th character note at either code.
Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on. In a row that differs, notes every code shares are dimmed.
Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources