M99.0

Non-Billable

ChapterM00–M99

Ranksubcategory

Official Description

Segmental and somatic dysfunction

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Non-billable category (requires more specific sub-code).
•Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).

General instructions are available for the parent sections:

View CH13 Notes

Clinical Hierarchy

CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)

M99Biomechanical lesions, not elsewhere classified

M99.0Segmental and somatic dysfunction

M99.00Segmental and somatic dysfunction of head region

M99.01Segmental and somatic dysfunction of cervical region

M99.02Segmental and somatic dysfunction of thoracic region

M99.03Segmental and somatic dysfunction of lumbar region

M99.04Segmental and somatic dysfunction of sacral region

M99.05Segmental and somatic dysfunction of pelvic region

M99.06Segmental and somatic dysfunction of lower extremity

M99.07Segmental and somatic dysfunction of upper extremity

M99.08Segmental and somatic dysfunction of rib cage

M99.09Segmental and somatic dysfunction of abdomen and other regions

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M99.0:

chapterCH13

Diseases of the musculoskeletal system and connective tissue (M00-M99)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to M99.0. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths

Dysfunction25 unique routes

somatic→M99.0(25 variants)

abdomen→M99.0

acromioclavicular→M99.0

cervical region→M99.0

cervicothoracic→M99.0

costochondral→M99.0

costovertebral→M99.0

head region→M99.0

hip→M99.0

lower extremity→M99.0