M45.A3 – Non-radiographic axial spondyloarthritis of cervicothoracic region
ICD-10-CM 2027 diagnosis code · Spondylopathies
ICD-10-CM code
M45.A3
- Code
M45.A3(claims format:M45A3)- Description
- Non-radiographic axial spondyloarthritis of cervicothoracic region
- Short description
- Non-radiographic axial spondyloarthritis of cervicothor rgn
- 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
- M45-M49 Spondylopathies
- Parent codes
- M45 › M45.A
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M45 – Ankylosing spondylitis
Applicable to:
- Rheumatoid arthritis of spine
Excludes1 (not coded here):
Excludes2 (not included here):
- Behçet's disease (M35.2)
Index terms for M45.A3
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in M45.A
- M45.A0 – Non-radiographic axial spondyloarthritis of unspecified sites in spineBillable
- M45.A1 – Non-radiographic axial spondyloarthritis of occipito-atlanto-axial regionBillable
- M45.A2 – Non-radiographic axial spondyloarthritis of cervical regionBillable
- M45.A4 – Non-radiographic axial spondyloarthritis of thoracic regionBillable
- M45.A5 – Non-radiographic axial spondyloarthritis of thoracolumbar regionBillable
- M45.A6 – Non-radiographic axial spondyloarthritis of lumbar regionBillable
- M45.A7 – Non-radiographic axial spondyloarthritis of lumbosacral regionBillable
- M45.A8 – Non-radiographic axial spondyloarthritis of sacral and sacrococcygeal regionBillable
- M45.AB – Non-radiographic axial spondyloarthritis of multiple sites in spineBillable
Frequently asked questions
What is ICD-10 code M45.A3?
M45.A3 is the ICD-10-CM code for non-radiographic axial spondyloarthritis of cervicothoracic region, in the block M45-M49 (Spondylopathies).
Is M45.A3 a billable code?
Yes. M45.A3 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does M45.A3 belong to?
It belongs to category M45 – Ankylosing spondylitis.
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.