M00.9 Pyogenic arthritis, unspecified
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The ICD-10-CM code for Pyogenic arthritis, unspecified is M00.9 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- M00-M02: Infectious arthropathies (M00-M02)
- Category M00
- 130 codes (97 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to M00.9:
- Infection, infected, infective (opportunistic) › shoulder (joint) NEC
- Infection, infected, infective (opportunistic) › joint NEC
- Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) › pyogenic or pyemic (any site except spine)
- Infection, infected, infective (opportunistic) › hip (joint) NEC
- Infection, infected, infective (opportunistic) › acromioclavicular
- Infection, infected, infective (opportunistic) › knee (joint) NEC
- Infection, infected, infective (opportunistic) › metatarsophalangeal
- Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) › knee › joint
Inclusion Terms
- Infective arthritis NOS
U.S. Hospital Utilization
- An estimated 69,395 U.S. inpatient stays in 2023 included M00.9 among the documented diagnoses.
- 15,320 stays listed it as the principal diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
Chapter 13 header13. Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)
Osteoporosis without pathological fracture (M81)Category M81, Osteoporosis without current pathological fracture, is for use for patients with osteoporosis who do not currently have a pathologic fracture due to the osteoporosis, even if they have had a fracture in the past. For patients with a history of osteoporosis fractures, status code Z87.310, Personal history of (healed) osteoporosis fracture, should follow the code from M81.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026
References
Cite This Page
Reference M00.9 with the canonical source and edition:
M00.9 — Pyogenic arthritis, unspecified. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/M00.9
Canonical URL: https://icd10codingpro.com/codes/M00.9