M99.00

Billable

ChapterM00–M99

Ranksubcategory

Official Description

Segmental and somatic dysfunction of head region

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•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

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M99.00:

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 M99.00. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

2 raw paths

Dysfunction2 unique routes

somatic(2 variants)

head region→M99.00

occipitocervical→M99.00

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 555

Signs and Symptoms of Musculoskeletal System and Connective Tissue with MCC

DRG 556

Signs and Symptoms of Musculoskeletal System and Connective Tissue without MCC

Cross Reference

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Find surgical and procedural codes related to Segmental and somatic dysfunction of head region.

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