ICD-10-CM 2027
ICD-10 code for somatic dysfunction
From the official ICD-10-CM alphabetic index entry “Dysfunction › somatic”. Page updated September 29, 2026.
About coding somatic dysfunction
The ICD-10-CM code for somatic dysfunction is M99.09 (Segmental and somatic dysfunction of abdomen and other regions). The official index lists 24 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M99.09.
Within M99.0, choose M99.09 (of abdomen and other regions) only when documentation doesn't support a more specific option: of head region (M99.00), of cervical region (M99.01), of thoracic region (M99.02), of lumbar region (M99.03), of sacral region (M99.04), of pelvic region (M99.05), of lower extremity (M99.06), of upper extremity (M99.07) and 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 555 (Signs and Symptoms of Musculoskeletal System and Connective Tissue with MCC, relative weight 1.2913) and DRG 556 (Signs and Symptoms of Musculoskeletal System and Connective Tissue without MCC, relative weight 0.8211), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific somatic dysfunction codes (official index)
- abdomen M99.09 — Segmental and somatic dysfunction of abdomen and other regions
- acromioclavicular M99.07 — Segmental and somatic dysfunction of upper extremity
- cervical region M99.01 — Segmental and somatic dysfunction of cervical region
- cervicothoracic M99.01 — Segmental and somatic dysfunction of cervical region
- costochondral M99.08 — Segmental and somatic dysfunction of rib cage
- costovertebral M99.08 — Segmental and somatic dysfunction of rib cage
- head region M99.00 — Segmental and somatic dysfunction of head region
- hip M99.05 — Segmental and somatic dysfunction of pelvic region
- lower extremity M99.06 — Segmental and somatic dysfunction of lower extremity
- lumbar region M99.03 — Segmental and somatic dysfunction of lumbar region
- lumbosacral M99.03 — Segmental and somatic dysfunction of lumbar region
- occipitocervical M99.00 — Segmental and somatic dysfunction of head region
- pelvic region M99.05 — Segmental and somatic dysfunction of pelvic region
- pubic M99.05 — Segmental and somatic dysfunction of pelvic region
- rib cage M99.08 — Segmental and somatic dysfunction of rib cage
- sacral region M99.04 — Segmental and somatic dysfunction of sacral region
- sacrococcygeal M99.04 — Segmental and somatic dysfunction of sacral region
- sacroiliac M99.04 — Segmental and somatic dysfunction of sacral region
- specified NEC M99.09 — Segmental and somatic dysfunction of abdomen and other regions
- sternochondral M99.08 — Segmental and somatic dysfunction of rib cage
- sternoclavicular M99.07 — Segmental and somatic dysfunction of upper extremity
- thoracic region M99.02 — Segmental and somatic dysfunction of thoracic region
- thoracolumbar M99.02 — Segmental and somatic dysfunction of thoracic region
- upper extremity M99.07 — Segmental and somatic dysfunction of upper extremity
Common questions about somatic dysfunction ICD-10 codes
What is the ICD-10 code for somatic dysfunction?
- M99.09 — Segmental and somatic dysfunction of abdomen and other regions. More specific codes apply when the documentation supports them: M99.09, M99.07, M99.01, M99.01 and others below.
What is the ICD-10 code for abdomen somatic dysfunction?
- M99.09 — Segmental and somatic dysfunction of abdomen and other regions.
What is the ICD-10 code for acromioclavicular somatic dysfunction?
- M99.07 — Segmental and somatic dysfunction of upper extremity.
What is the ICD-10 code for cervical region somatic dysfunction?
- M99.01 — Segmental and somatic dysfunction of cervical region.
What is the ICD-10 code for cervicothoracic somatic dysfunction?
- M99.01 — Segmental and somatic dysfunction of cervical region.
What is the ICD-10 code for costochondral somatic dysfunction?
- M99.08 — Segmental and somatic dysfunction of rib cage.
What is the ICD-10 code for costovertebral somatic dysfunction?
- M99.08 — Segmental and somatic dysfunction of rib cage.
Is M99.09 billable?
- Yes. M99.09 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M99.09 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M99.09 as a principal diagnosis.
Is M99.09 a CC or MCC?
- No. M99.09 is neither a CC nor an MCC under MS-DRG v44.0.