ICD-10-CM 2027 diagnosis code
M48.1Ankylosing hyperostosis [Forestier]
M48.1 is a header code, so it can't be reported by itself. Choose one of the 10 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About M48.1
M48.1 is the ICD-10-CM diagnosis code for ankylosing hyperostosis [Forestier]. It belongs to category M48 (other spondylopathies), block M45-M49 (spondylopathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.
Within M48 (other spondylopathies), M48.1 is specifically for ankylosing hyperostosis [Forestier]. Related codes cover spinal stenosis (M48.0), Kissing spine (M48.2), traumatic spondylopathy (M48.3), fatigue fracture of vertebra (M48.4), Collapsed vertebra, not elsewhere classified (M48.5), other specified spondylopathies (M48.8) and spondylopathy, unspecified (M48.9).
To report this condition, pick the subcode that matches the documentation: M48.10 (site unspecified), M48.11 (occipito-atlanto-axial region), M48.12 (cervical region), M48.13 (cervicothoracic region), M48.14 (thoracic region), M48.15 (thoracolumbar region), M48.16 (lumbar region), M48.17 (lumbosacral region) and 2 more.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under M48.1
- M48.10Ankylosing hyperostosis [Forestier], site unspecifiedBillable
- M48.11Ankylosing hyperostosis [Forestier], occipito-atlanto-axial regionBillable
- M48.12Ankylosing hyperostosis [Forestier], cervical regionBillable
- M48.13Ankylosing hyperostosis [Forestier], cervicothoracic regionBillable
- M48.14Ankylosing hyperostosis [Forestier], thoracic regionBillable
- M48.15Ankylosing hyperostosis [Forestier], thoracolumbar regionBillable
- M48.16Ankylosing hyperostosis [Forestier], lumbar regionBillable
- M48.17Ankylosing hyperostosis [Forestier], lumbosacral regionBillable
- M48.18Ankylosing hyperostosis [Forestier], sacral and sacrococcygeal regionBillable
- M48.19Ankylosing hyperostosis [Forestier], multiple sites in spineBillable
Coding notes
- Diffuse idiopathic skeletal hyperostosis [DISH]
Notes that apply from higher levels
Instructions written at a parent level also apply to M48.1.
Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.
Codes whose notes reference M48.1
- M85.8Excludes1
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about M48.1
Is M48.1 billable?
- No. M48.1 is a header code. Report one of its more specific subcodes instead.