M99.42 – Connective tissue stenosis of neural canal of thoracic region
ICD-10-CM 2027 diagnosis code · Biomechanical lesions, not elsewhere classified (M99)
- Code
M99.42(claims format:M9942)- Description
- Connective tissue stenosis of neural canal of thoracic region
- Short description
- Connective tiss stenosis of neural canal of thoracic region
- 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 › M99.4
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
- This category should not be used if the condition can be classified elsewhere.
Index terms for M99.42
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in M99.4
- M99.40 – Connective tissue stenosis of neural canal of head regionBillable
- M99.41 – Connective tissue stenosis of neural canal of cervical regionBillable
- M99.43 – Connective tissue stenosis of neural canal of lumbar regionBillable
- M99.44 – Connective tissue stenosis of neural canal of sacral regionBillable
- M99.45 – Connective tissue stenosis of neural canal of pelvic regionBillable
- M99.46 – Connective tissue stenosis of neural canal of lower extremityBillable
- M99.47 – Connective tissue stenosis of neural canal of upper extremityBillable
- M99.48 – Connective tissue stenosis of neural canal of rib cageBillable
- M99.49 – Connective tissue stenosis of neural canal of abdomen and other regionsBillable
Frequently asked questions
What is ICD-10 code M99.42?
M99.42 is the ICD-10-CM code for connective tissue stenosis of neural canal of thoracic region, in the block M99 (Biomechanical lesions, not elsewhere classified (M99)).
Is M99.42 a billable code?
Yes. M99.42 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does M99.42 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.