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ICD-10-CM · FY 2026 APRIL UPDATE

M99

Biomechanical lesions, not elsewhere classified

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
M99.0Segmental and somatic dysfunctionCategory
M99.00Segmental and somatic dysfunction of head regionBillable
M99.01Segmental and somatic dysfunction of cervical regionBillable
M99.02Segmental and somatic dysfunction of thoracic regionBillable
M99.03Segmental and somatic dysfunction of lumbar regionBillable
M99.04Segmental and somatic dysfunction of sacral regionBillable
M99.05Segmental and somatic dysfunction of pelvic regionBillable
M99.06Segmental and somatic dysfunction of lower extremityBillable
M99.07Segmental and somatic dysfunction of upper extremityBillable
M99.08Segmental and somatic dysfunction of rib cageBillable
M99.09Segmental and somatic dysfunction of abdomen and other regionsBillable
M99.1Subluxation complex (vertebral)Category
M99.10Subluxation complex (vertebral) of head regionBillable
M99.11Subluxation complex (vertebral) of cervical regionBillable
M99.12Subluxation complex (vertebral) of thoracic regionBillable
M99.13Subluxation complex (vertebral) of lumbar regionBillable
M99.14Subluxation complex (vertebral) of sacral regionBillable
M99.15Subluxation complex (vertebral) of pelvic regionBillable
M99.16Subluxation complex (vertebral) of lower extremityBillable
M99.17Subluxation complex (vertebral) of upper extremityBillable
M99.18Subluxation complex (vertebral) of rib cageBillable
M99.19Subluxation complex (vertebral) of abdomen and other regionsBillable
M99.2Subluxation stenosis of neural canalCategory
M99.20Subluxation stenosis of neural canal of head regionBillable
M99.21Subluxation stenosis of neural canal of cervical regionBillable
M99.22Subluxation stenosis of neural canal of thoracic regionBillable
M99.23Subluxation stenosis of neural canal of lumbar regionBillable
M99.24Subluxation stenosis of neural canal of sacral regionBillable
M99.25Subluxation stenosis of neural canal of pelvic regionBillable
M99.26Subluxation stenosis of neural canal of lower extremityBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.