M17.9 ICD-10-CM Code: Osteoarthritis of knee, unspecified
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
M17.9Osteoarthritis of knee, unspecified
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where M17.9 sits
- 1
Chapter 13
Diseases of the musculoskeletal system and connective tissue (M00-M99)
- 2
Section
Osteoarthritis (M15-M19)
- 3
Category M17
Osteoarthritis of knee
- 4
Code M17.9
Osteoarthritis of knee, unspecified
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for M17.9.
Code first
No “code first” instruction is listed for M17.9.
Use additional code
No “use additional code” instruction is listed for M17.9.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for M17.9.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for M17.9.
Transparency
Source and release
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.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code M17.9 mean?
M17.9 is the FY 2027 U.S. ICD-10-CM code for “Osteoarthritis of knee, unspecified.”
Is M17.9 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, M17.9 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is M17.9 located in ICD-10-CM?
M17.9 is listed in Chapter 13, Diseases of the musculoskeletal system and connective tissue (M00-M99), within Osteoarthritis (M15-M19) (M15–M19), under category M17, Osteoarthritis of knee.
What coding notes are listed for M17.9?
No inclusion terms are listed for M17.9 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
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