M99.9 – Biomechanical lesion, unspecified
ICD-10-CM 2027 diagnosis code · Biomechanical lesions, not elsewhere classified (M99)
ICD-10-CM code
M99.9
- Code
M99.9(claims format:M999)- Description
- Biomechanical lesion, unspecified
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
- Block
- M99 Biomechanical lesions, not elsewhere classified (M99)
- Parent codes
- M99
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M99 – Biomechanical lesions, not elsewhere classified
Notes:
- This category should not be used if the condition can be classified elsewhere.
Index terms for M99.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in M99
- M99.0 – Segmental and somatic dysfunctionHeader
- M99.1 – Subluxation complex (vertebral)Header
- M99.2 – Subluxation stenosis of neural canalHeader
- M99.3 – Osseous stenosis of neural canalHeader
- M99.4 – Connective tissue stenosis of neural canalHeader
- M99.5 – Intervertebral disc stenosis of neural canalHeader
- M99.6 – Osseous and subluxation stenosis of intervertebral foraminaHeader
- M99.7 – Connective tissue and disc stenosis of intervertebral foraminaHeader
- M99.8 – Other biomechanical lesionsHeader
Frequently asked questions
What is ICD-10 code M99.9?
M99.9 is the ICD-10-CM code for biomechanical lesion, unspecified, in the block M99 (Biomechanical lesions, not elsewhere classified (M99)).
Is M99.9 a billable code?
Yes. M99.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does M99.9 belong to?
It belongs to category M99 – Biomechanical lesions, not elsewhere classified.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.