M85.2 – Hyperostosis of skull
ICD-10-CM 2027 diagnosis code · Disorders of bone density and structure
ICD-10-CM code
M85.2
- Code
M85.2(claims format:M852)- Description
- Hyperostosis of skull
- Billable
- Yes – valid for HIPAA-covered transactions
- 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
- M80-M85 Disorders of bone density and structure
- Parent codes
- M85
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M85 – Other disorders of bone density and structure
Index terms for M85.2
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Morel
- Buchem's syndrome
- Syndrome, Morgagni
- Syndrome, Buchem's
- Leontiasis, ossium
- Hyperostosis, skull
- Morgagni's, syndrome
- Morel-Moore syndrome
- Van Buchem's syndrome
- Syndrome, Morel-Moore
- Stewart-Morel syndrome
- Hyperostosis, cortical
- Syndrome, van Buchem's
- Craniopathy, metabolic
- Syndrome, Stewart-Morel
- Syndrome, Morel-Morgagni
- Disease, diseased, Morgagni's
- Hyperostosis, interna frontalis
- Morgagni-Stewart-Morel syndrome
- Hyperostosis, frontal, internal of skull
- Disorder, bone, density and structure, hyperostosis of skull
Related codes in M85
- M85.0 – Fibrous dysplasia (monostotic)Header
- M85.1 – Skeletal fluorosisHeader
- M85.3 – Osteitis condensansHeader
- M85.4 – Solitary bone cystHeader
- M85.5 – Aneurysmal bone cystHeader
- M85.6 – Other cyst of boneHeader
- M85.8 – Other specified disorders of bone density and structureHeader
- M85.9 – Disorder of bone density and structure, unspecifiedBillable
Frequently asked questions
What is ICD-10 code M85.2?
M85.2 is the ICD-10-CM code for hyperostosis of skull, in the block M80-M85 (Disorders of bone density and structure).
Is M85.2 a billable code?
Yes. M85.2 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does M85.2 belong to?
It belongs to category M85 – Other disorders of bone density and structure.
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.