M99 ICD-10-CM Code: Biomechanical lesions, not elsewhere classified
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
M99Biomechanical lesions, not elsewhere classified
ICD-10-CM diagnosis code · United States clinical modification
Where M99 sits
- 1
Chapter 13
Diseases of the musculoskeletal system and connective tissue (M00-M99)
- 2
Section
Biomechanical lesions, not elsewhere classified (M99)
- 3
Category M99
Biomechanical lesions, not elsewhere classified
- 4
Code M99
Biomechanical lesions, not elsewhere classified
Codes under M99
M99 is a non-billable category. Choose the child code that best matches the documented diagnosis.
M99.0Segmental and somatic dysfunctionM99.1Subluxation complex (vertebral)M99.2Subluxation stenosis of neural canalM99.3Osseous stenosis of neural canalM99.4Connective tissue stenosis of neural canalM99.5Intervertebral disc stenosis of neural canalM99.6Osseous and subluxation stenosis of intervertebral foraminaM99.7Connective tissue and disc stenosis of intervertebral foraminaM99.8Other biomechanical lesionsM99.9Biomechanical lesion, unspecifiedNotes for this code
Inclusion terms
No inclusion terms are listed for M99.
Code first
No “code first” instruction is listed for M99.
Use additional code
No “use additional code” instruction is listed for M99.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for M99.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for M99.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code M99 mean?
M99 is the FY 2027 U.S. ICD-10-CM code for “Biomechanical lesions, not elsewhere classified.”
Is M99 a billable or specific ICD-10-CM code?
No. M99 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is M99 located in ICD-10-CM?
M99 is listed in Chapter 13, Diseases of the musculoskeletal system and connective tissue (M00-M99), within Biomechanical lesions, not elsewhere classified (M99) (M99–M99), under category M99, Biomechanical lesions, not elsewhere classified.
What coding notes are listed for M99?
No inclusion terms are listed for M99 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.