M00.9 Pyogenic arthritis, unspecified
Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.
Applicable to
Applies from M00 Pyogenic arthritis
Excludes2 (not included here)
- infection and inflammatory reaction due to internal joint prosthesis (T84.5-)
Risk adjustment (HCC)
- CMS-HCC V28: HCC 92 — Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis
- CMS-HCC V22: HCC 39 — Bone/Joint/Muscle Infections/Necrosis
- ESRD V24: HCC 39
MS-DRG index
Defines the logic of DRG(s) 485-487 in MDC 08.
Approximate ICD-9-CM (GEMs)
711.00 Pyogenic arthritis, site unspecified (approximate)
Diagnosis Index entries for M00.9
- Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) › knee › joint
- Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) › pyogenic or pyemic (any site except spine)
- Disease, diseased › hip (joint) › suppurative
- Infection, infected, infective (opportunistic) › acromioclavicular
- Infection, infected, infective (opportunistic) › hip (joint) NEC
- Infection, infected, infective (opportunistic) › joint NEC
- Infection, infected, infective (opportunistic) › knee (joint) NEC
- Infection, infected, infective (opportunistic) › knee (joint) NEC › joint
- Infection, infected, infective (opportunistic) › metatarsophalangeal
- Infection, infected, infective (opportunistic) › shoulder (joint) NEC
Nearby codes
M00.871 Arthritis due to other bacteria, right ankle and footM00.872 Arthritis due to other bacteria, left ankle and footM00.879 Arthritis due to other bacteria, unspecified ankle and footM00.88 Arthritis due to other bacteria, vertebraeM00.89 Polyarthritis due to other bacteriaM00.9 Pyogenic arthritis, unspecified (this code)