M45.7
✓ BillableAnkylosing spondylitis of lumbosacral region
Diseases of the musculoskeletal system and connective tissue (M00-M99)
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • arthropathy in Reiter's disease (M02.3-)
- • juvenile (ankylosing) spondylitis (M08.1)
Clinical Description
ICD-10-CM code M45.7 represents ankylosing spondylitis of lumbosacral region. This code falls under the Diseases of the musculoskeletal system and connective tissue (M00-M99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 5-character code at the 4th level of specificity. This is the most specific code available in this subcategory. Coders should note that M45.7 has 2 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code M45.7?
ICD-10-CM code M45.7 is "Ankylosing spondylitis of lumbosacral region". It belongs to the category: Diseases of the musculoskeletal system and connective tissue (M00-M99).
Is M45.7 a billable ICD-10 code?
Yes, M45.7 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with M45.7?
M45.7 has 2 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Can M45.7 be coded with other codes?
M45.7 has 1 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
Related Codes in M45
Other codes in the same category that may be relevant for differential coding:
🧪 Validate Combinations
Add M45.7 to the Excludes Checker to validate against your full code list.
Open in Checker →Code Information
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)