ICD-10-CM
ICD-10 code for Stewart-Morel syndrome: M85.2
The ICD-10-CM index points "Stewart-Morel syndrome" to M85.2, Hyperostosis of skull. M85.2 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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More specific codes in M85
A header groups codes and is not billed. A billable code is one you can report.
- M85Other disorders of bone density and structureHeader
- M85.0Fibrous dysplasia (monostotic)Header
- M85.00Fibrous dysplasia (monostotic), unspecified siteBillable
- M85.01Fibrous dysplasia (monostotic), shoulderHeader
- M85.02Fibrous dysplasia (monostotic), upper armHeader
- M85.03Fibrous dysplasia (monostotic), forearmHeader
- M85.04Fibrous dysplasia (monostotic), handHeader
- M85.05Fibrous dysplasia (monostotic), thighHeader
- M85.06Fibrous dysplasia (monostotic), lower legHeader
- M85.07Fibrous dysplasia (monostotic), ankle and footHeader
- M85.08Fibrous dysplasia (monostotic), other siteBillable
- M85.09Fibrous dysplasia (monostotic), multiple sitesBillable
- M85.1Skeletal fluorosisHeader
- M85.10Skeletal fluorosis, unspecified siteBillable
- M85.11Skeletal fluorosis, shoulderHeader
- M85.12Skeletal fluorosis, upper armHeader
- M85.13Skeletal fluorosis, forearmHeader
- M85.14Skeletal fluorosis, handHeader
- M85.15Skeletal fluorosis, thighHeader
- M85.16Skeletal fluorosis, lower legHeader
- M85.17Skeletal fluorosis, ankle and footHeader
- M85.18Skeletal fluorosis, other siteBillable
- M85.19Skeletal fluorosis, multiple sitesBillable
- M85.2Hyperostosis of skullBillable
- M85.3Osteitis condensansHeader
- M85.30Osteitis condensans, unspecified siteBillable
- M85.31Osteitis condensans, shoulderHeader
- M85.32Osteitis condensans, upper armHeader
- M85.33Osteitis condensans, forearmHeader
- M85.34Osteitis condensans, handHeader
- M85.35Osteitis condensans, thighHeader
- M85.36Osteitis condensans, lower legHeader
- M85.37Osteitis condensans, ankle and footHeader
- M85.38Osteitis condensans, other siteBillable
- M85.39Osteitis condensans, multiple sitesBillable
- M85.4Solitary bone cystHeader
- M85.40Solitary bone cyst, unspecified siteBillable
- M85.41Solitary bone cyst, shoulderHeader
- M85.42Solitary bone cyst, humerusHeader
- M85.43Solitary bone cyst, ulna and radiusHeader
- M85.44Solitary bone cyst, handHeader
- M85.45Solitary bone cyst, pelvisHeader
- M85.46Solitary bone cyst, tibia and fibulaHeader
- M85.47Solitary bone cyst, ankle and footHeader
- M85.48Solitary bone cyst, other siteBillable
- M85.5Aneurysmal bone cystHeader
- M85.50Aneurysmal bone cyst, unspecified siteBillable
- M85.51Aneurysmal bone cyst, shoulderHeader
- M85.52Aneurysmal bone cyst, upper armHeader
- M85.53Aneurysmal bone cyst, forearmHeader
- M85.54Aneurysmal bone cyst, handHeader
- M85.55Aneurysmal bone cyst, thighHeader
- M85.56Aneurysmal bone cyst, lower legHeader
- M85.57Aneurysmal bone cyst, ankle and footHeader
- M85.58Aneurysmal bone cyst, other siteBillable
- M85.59Aneurysmal bone cyst, multiple sitesBillable
- M85.6Other cyst of boneHeader
- M85.60Other cyst of bone, unspecified siteBillable
- M85.61Other cyst of bone, shoulderHeader
- M85.62Other cyst of bone, upper armHeader
Excludes1
Excludes1 means these codes are not reported together.
From M85. A note on a category applies to every code under it.
Related conditions
Related pages
- M85.2 code detailsNotes, nearby codes, CMS-HCC group
- Category M85Every code under it
- Chapter 13Diseases of the musculoskeletal system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Stewart-Morel syndrome?
The ICD-10-CM index points "Stewart-Morel syndrome" to M85.2, Hyperostosis of skull. M85.2 is a billable code.
Is M85.2 billable?
Yes. M85.2 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to M85.2?
The CDC tabular list gives 4 Excludes1 notes (not coded together) for M85.2 and the categories above it. They are listed on this page.
What chapter is M85.2 in?
Chapter 13. Diseases of the musculoskeletal system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.