All ICD10 Codes

M99

Non-Billable
ChapterM00–M99
Rankcategory
Official Description

Biomechanical lesions, not elsewhere classified

Use a more specific code (1 billable, 9 non-billable)
M99.0Segmental and somatic dysfunctionhas subcodesM99.1Subluxation complex (vertebral)has subcodesM99.2Subluxation stenosis of neural canalhas subcodesM99.3Osseous stenosis of neural canalhas subcodesM99.4Connective tissue stenosis of neural canalhas subcodesM99.5Intervertebral disc stenosis of neural canalhas subcodesM99.6Osseous and subluxation stenosis of intervertebral foraminahas subcodesM99.7Connective tissue and disc stenosis of intervertebral foraminahas subcodesM99.8Other biomechanical lesionshas subcodesM99.9Biomechanical lesion, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).

CH13 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)

Clinical Hierarchy

BillableHas subcodes
CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)
M99Biomechanical lesions, not elsewhere classifiedNot billable
M99.0Segmental and somatic dysfunctionSubcodes
M99.1Subluxation complex (vertebral)Subcodes
M99.2Subluxation stenosis of neural canalSubcodes
M99.3Osseous stenosis of neural canalSubcodes
M99.4Connective tissue stenosis of neural canalSubcodes
M99.5Intervertebral disc stenosis of neural canalSubcodes
M99.6Osseous and subluxation stenosis of intervertebral foraminaSubcodes
M99.7Connective tissue and disc stenosis of intervertebral foraminaSubcodes
M99.8Other biomechanical lesionsSubcodes
M99.9Biomechanical lesion, unspecifiedBillable

Applicable Ancestor Context

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

chapterCH13
Diseases of the musculoskeletal system and connective tissue (M00-M99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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