M48.1 — Ankylosing hyperostosis [Forestier]
Is M48.1 billable?
No — M48.1 is a non-billable header code. M48.1 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 10 billable codes beneath M48.1.
Billable codes under this header
- M48.10Ankylosing hyperostosis [Forestier], site unspecified
- M48.11Ankylosing hyperostosis [Forestier], occipito-atlanto-axial region
- M48.12Ankylosing hyperostosis [Forestier], cervical region
- M48.13Ankylosing hyperostosis [Forestier], cervicothoracic region
- M48.14Ankylosing hyperostosis [Forestier], thoracic region
- M48.15Ankylosing hyperostosis [Forestier], thoracolumbar region
- M48.16Ankylosing hyperostosis [Forestier], lumbar region
- M48.17Ankylosing hyperostosis [Forestier], lumbosacral region
- M48.18Ankylosing hyperostosis [Forestier], sacral and sacrococcygeal region
- M48.19Ankylosing hyperostosis [Forestier], multiple sites in spine
M48.1 at a glance
| Code | M48.1 |
|---|---|
| Description | Ankylosing hyperostosis [Forestier] |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Inclusion terms
Alternative wording in documentation that is classified to M48.1.
- Diffuse idiopathic skeletal hyperostosis [DISH]
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M48.1, but a patient may have both at the same time. When documentation supports it, M48.1 and the excluded code may both be reported.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
What codes fall under M48.1? (10)
- M48.10Ankylosing hyperostosis [Forestier], site unspecified
- M48.11Ankylosing hyperostosis [Forestier], occipito-atlanto-axial region
- M48.12Ankylosing hyperostosis [Forestier], cervical region
- M48.13Ankylosing hyperostosis [Forestier], cervicothoracic region
- M48.14Ankylosing hyperostosis [Forestier], thoracic region
- M48.15Ankylosing hyperostosis [Forestier], thoracolumbar region
- M48.16Ankylosing hyperostosis [Forestier], lumbar region
- M48.17Ankylosing hyperostosis [Forestier], lumbosacral region
- M48.18Ankylosing hyperostosis [Forestier], sacral and sacrococcygeal region
- M48.19Ankylosing hyperostosis [Forestier], multiple sites in spine
How long has M48.1 existed?
M48.1 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with M48.1?
ICD-10-CM declares these codes mutually exclusive with M48.1 — exactly one of each pair can be correct for a given encounter.