1. Home
  2. ICD-10-CM Codes
  3. M00–M99
  4. M99
  5. M99
  6. 2026 ICD-10-CM Code M99

2026 ICD-10-CM Diagnosis Code M99

Biomechanical lesions, not elsewhere classified

ICD-10-CM Code:
M99
ICD-10 Code for:
Biomechanical lesions, not elsewhere classified
Is Billable?
Not Valid for Submission
Code Navigator:

M99 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity from the list below for a diagnosis of biomechanical lesions, not elsewhere classified. The code is not specific and is NOT valid for the year 2026 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Biomechanical lesions, not elsewhere classified

Non-specific codes like M99 require more digits to indicate the appropriate level of specificity. Consider using any of the following billable codes with a higher level of specificity when coding for biomechanical lesions, not elsewhere classified:

  • M99.0 for Segmental and somatic dysfunction

  • Use M99.00 for Segmental and somatic dysfunction of head region

  • Use M99.01 for Segmental and somatic dysfunction of cervical region

  • Use M99.02 for Segmental and somatic dysfunction of thoracic region

  • Use M99.03 for Segmental and somatic dysfunction of lumbar region

  • Use M99.04 for Segmental and somatic dysfunction of sacral region

  • Use M99.05 for Segmental and somatic dysfunction of pelvic region

  • Use M99.06 for Segmental and somatic dysfunction of lower extremity

  • Use M99.07 for Segmental and somatic dysfunction of upper extremity

  • Use M99.08 for Segmental and somatic dysfunction of rib cage

  • Use M99.09 for Segmental and somatic dysfunction of abdomen and other regions

  • M99.1 for Subluxation complex (vertebral)

  • Use M99.10 for Subluxation complex (vertebral) of head region

  • Use M99.11 for Subluxation complex (vertebral) of cervical region

  • Use M99.12 for Subluxation complex (vertebral) of thoracic region

  • Use M99.13 for Subluxation complex (vertebral) of lumbar region

  • Use M99.14 for Subluxation complex (vertebral) of sacral region

  • Use M99.15 for Subluxation complex (vertebral) of pelvic region

  • Use M99.16 for Subluxation complex (vertebral) of lower extremity

  • Use M99.17 for Subluxation complex (vertebral) of upper extremity

  • Use M99.18 for Subluxation complex (vertebral) of rib cage

  • Use M99.19 for Subluxation complex (vertebral) of abdomen and other regions

  • M99.2 for Subluxation stenosis of neural canal

  • Use M99.20 for Subluxation stenosis of neural canal of head region

  • Use M99.21 for Subluxation stenosis of neural canal of cervical region

  • Use M99.22 for Subluxation stenosis of neural canal of thoracic region

  • Use M99.23 for Subluxation stenosis of neural canal of lumbar region

  • Use M99.24 for Subluxation stenosis of neural canal of sacral region

  • Use M99.25 for Subluxation stenosis of neural canal of pelvic region

  • Use M99.26 for Subluxation stenosis of neural canal of lower extremity

  • Use M99.27 for Subluxation stenosis of neural canal of upper extremity

  • Use M99.28 for Subluxation stenosis of neural canal of rib cage

  • Use M99.29 for Subluxation stenosis of neural canal of abdomen and other regions

  • M99.3 for Osseous stenosis of neural canal

  • Use M99.30 for Osseous stenosis of neural canal of head region

  • Use M99.31 for Osseous stenosis of neural canal of cervical region

  • Use M99.32 for Osseous stenosis of neural canal of thoracic region

  • Use M99.33 for Osseous stenosis of neural canal of lumbar region

  • Use M99.34 for Osseous stenosis of neural canal of sacral region

  • Use M99.35 for Osseous stenosis of neural canal of pelvic region

  • Use M99.36 for Osseous stenosis of neural canal of lower extremity

  • Use M99.37 for Osseous stenosis of neural canal of upper extremity

  • Use M99.38 for Osseous stenosis of neural canal of rib cage

  • Use M99.39 for Osseous stenosis of neural canal of abdomen and other regions

  • M99.4 for Connective tissue stenosis of neural canal

  • Use M99.40 for Connective tissue stenosis of neural canal of head region

  • Use M99.41 for Connective tissue stenosis of neural canal of cervical region

  • Use M99.42 for Connective tissue stenosis of neural canal of thoracic region

  • Use M99.43 for Connective tissue stenosis of neural canal of lumbar region

  • Use M99.44 for Connective tissue stenosis of neural canal of sacral region

  • Use M99.45 for Connective tissue stenosis of neural canal of pelvic region

  • Use M99.46 for Connective tissue stenosis of neural canal of lower extremity

  • Use M99.47 for Connective tissue stenosis of neural canal of upper extremity

  • Use M99.48 for Connective tissue stenosis of neural canal of rib cage

  • Use M99.49 for Connective tissue stenosis of neural canal of abdomen and other regions

  • M99.5 for Intervertebral disc stenosis of neural canal

  • Use M99.50 for Intervertebral disc stenosis of neural canal of head region

  • Use M99.51 for Intervertebral disc stenosis of neural canal of cervical region

  • Use M99.52 for Intervertebral disc stenosis of neural canal of thoracic region

  • Use M99.53 for Intervertebral disc stenosis of neural canal of lumbar region

  • Use M99.54 for Intervertebral disc stenosis of neural canal of sacral region

  • Use M99.55 for Intervertebral disc stenosis of neural canal of pelvic region

  • Use M99.56 for Intervertebral disc stenosis of neural canal of lower extremity

  • Use M99.57 for Intervertebral disc stenosis of neural canal of upper extremity

  • Use M99.58 for Intervertebral disc stenosis of neural canal of rib cage

  • Use M99.59 for Intervertebral disc stenosis of neural canal of abdomen and other regions

  • M99.6 for Osseous and subluxation stenosis of intervertebral foramina

  • Use M99.60 for Osseous and subluxation stenosis of intervertebral foramina of head region

  • Use M99.61 for Osseous and subluxation stenosis of intervertebral foramina of cervical region

  • Use M99.62 for Osseous and subluxation stenosis of intervertebral foramina of thoracic region

  • Use M99.63 for Osseous and subluxation stenosis of intervertebral foramina of lumbar region

  • Use M99.64 for Osseous and subluxation stenosis of intervertebral foramina of sacral region

  • Use M99.65 for Osseous and subluxation stenosis of intervertebral foramina of pelvic region

  • Use M99.66 for Osseous and subluxation stenosis of intervertebral foramina of lower extremity

  • Use M99.67 for Osseous and subluxation stenosis of intervertebral foramina of upper extremity

  • Use M99.68 for Osseous and subluxation stenosis of intervertebral foramina of rib cage

  • Use M99.69 for Osseous and subluxation stenosis of intervertebral foramina of abdomen and other regions

  • M99.7 for Connective tissue and disc stenosis of intervertebral foramina

  • Use M99.70 for Connective tissue and disc stenosis of intervertebral foramina of head region

  • Use M99.71 for Connective tissue and disc stenosis of intervertebral foramina of cervical region

  • Use M99.72 for Connective tissue and disc stenosis of intervertebral foramina of thoracic region

  • Use M99.73 for Connective tissue and disc stenosis of intervertebral foramina of lumbar region

  • Use M99.74 for Connective tissue and disc stenosis of intervertebral foramina of sacral region

  • Use M99.75 for Connective tissue and disc stenosis of intervertebral foramina of pelvic region

  • Use M99.76 for Connective tissue and disc stenosis of intervertebral foramina of lower extremity

  • Use M99.77 for Connective tissue and disc stenosis of intervertebral foramina of upper extremity

  • Use M99.78 for Connective tissue and disc stenosis of intervertebral foramina of rib cage

  • Use M99.79 for Connective tissue and disc stenosis of intervertebral foramina of abdomen and other regions

  • M99.8 for Other biomechanical lesions

  • Use M99.80 for Other biomechanical lesions of head region

  • Use M99.81 for Other biomechanical lesions of cervical region

  • Use M99.82 for Other biomechanical lesions of thoracic region

  • Use M99.83 for Other biomechanical lesions of lumbar region

  • Use M99.84 for Other biomechanical lesions of sacral region

  • Use M99.85 for Other biomechanical lesions of pelvic region

  • Use M99.86 for Other biomechanical lesions of lower extremity

  • Use M99.87 for Other biomechanical lesions of upper extremity

  • Use M99.88 for Other biomechanical lesions of rib cage

  • Use M99.89 for Other biomechanical lesions of abdomen and other regions

  • Use M99.9 for Biomechanical lesion, unspecified

Code Classification

  • Diseases of the musculoskeletal system and connective tissue
    M00–M99
    • Biomechanical lesions, not elsewhere classified
      M99
      • Biomechanical lesions, not elsewhere classified
        M99

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


  • This category should not be used if the condition can be classified elsewhere.

Code History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026
  • FY 2025 - No Change, effective from 10/1/2024 through 9/30/2025
  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.