ICD-10-CM 2027
ICD-10 code for chronic osteomyelitis
M86.60
Other chronic osteomyelitis, unspecified site
From the official ICD-10-CM alphabetic index entry “Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis) › chronic (or old)”. Page updated September 29, 2026.
About coding chronic osteomyelitis
The ICD-10-CM code for chronic osteomyelitis is M86.60 (Other chronic osteomyelitis, unspecified site). The official index lists 92 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on M86.60.
Within M86.6, choose M86.60 (unspecified site) only when documentation doesn't support a more specific option: shoulder (M86.61), humerus (M86.62), radius and ulna (M86.63), hand (M86.64), thigh (M86.65), tibia and fibula (M86.66), ankle and foot (M86.67), other site (M86.68) and 1 more.
Use an additional code (B95-B97) to identify infectious agent. Use an additional code to identify major osseous defect, if applicable (M89.7-).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
More specific chronic osteomyelitis codes (official index)
- with draining sinus M86.40 — Chronic osteomyelitis with draining sinus, unspecified site
- carpus M86.44 — Chronic osteomyelitis with draining sinus, hand
- clavicle M86.41 — Chronic osteomyelitis with draining sinus, shoulder
- femur M86.45 — Chronic osteomyelitis with draining sinus, femur
- fibula M86.46 — Chronic osteomyelitis with draining sinus, tibia and fibula
- finger M86.44 — Chronic osteomyelitis with draining sinus, hand
- humerus M86.42 — Chronic osteomyelitis with draining sinus, humerus
- ilium M86.48 — Chronic osteomyelitis with draining sinus, other site
- ischium M86.48 — Chronic osteomyelitis with draining sinus, other site
- mandible M27.2 — Inflammatory conditions of jaws
- metacarpus M86.44 — Chronic osteomyelitis with draining sinus, hand
- metatarsus M86.47 — Chronic osteomyelitis with draining sinus, ankle and foot
- multiple sites M86.49 — Chronic osteomyelitis with draining sinus, multiple sites
- neck M86.48 — Chronic osteomyelitis with draining sinus, other site
- pubic ramus [pubis] M86.48 — Chronic osteomyelitis with draining sinus, other site
- orbit H05.02 — Osteomyelitis of orbit
- petrous bone
- radius M86.43 — Chronic osteomyelitis with draining sinus, radius and ulna
- rib M86.48 — Chronic osteomyelitis with draining sinus, other site
- scapula M86.41 — Chronic osteomyelitis with draining sinus, shoulder
- skull M86.48 — Chronic osteomyelitis with draining sinus, other site
- tarsus M86.47 — Chronic osteomyelitis with draining sinus, ankle and foot
- tibia M86.46 — Chronic osteomyelitis with draining sinus, tibia and fibula
- toe M86.47 — Chronic osteomyelitis with draining sinus, ankle and foot
- ulna M86.43 — Chronic osteomyelitis with draining sinus, radius and ulna
- vertebra
- carpus M86.64 — Other chronic osteomyelitis, hand
- clavicle M86.61 — Other chronic osteomyelitis, shoulder
- femur M86.65 — Other chronic osteomyelitis, thigh
- fibula M86.66 — Other chronic osteomyelitis, tibia and fibula
- finger M86.64 — Other chronic osteomyelitis, hand
- hematogenous NEC M86.50 — Other chronic hematogenous osteomyelitis, unspecified site
- carpus M86.54 — Other chronic hematogenous osteomyelitis, hand
- clavicle M86.51 — Other chronic hematogenous osteomyelitis, shoulder
- femur M86.55 — Other chronic hematogenous osteomyelitis, femur
- fibula M86.56 — Other chronic hematogenous osteomyelitis, tibia and fibula
- finger M86.54 — Other chronic hematogenous osteomyelitis, hand
- humerus M86.52 — Other chronic hematogenous osteomyelitis, humerus
- ilium M86.58 — Other chronic hematogenous osteomyelitis, other site
- ischium M86.58 — Other chronic hematogenous osteomyelitis, other site
- mandible M27.2 — Inflammatory conditions of jaws
- metacarpus M86.54 — Other chronic hematogenous osteomyelitis, hand
- metatarsus M86.57 — Other chronic hematogenous osteomyelitis, ankle and foot
- multifocal M86.30 — Chronic multifocal osteomyelitis, unspecified site
- carpus M86.34 — Chronic multifocal osteomyelitis, hand
- clavicle M86.31 — Chronic multifocal osteomyelitis, shoulder
- femur M86.35 — Chronic multifocal osteomyelitis, femur
- fibula M86.36 — Chronic multifocal osteomyelitis, tibia and fibula
- finger M86.34 — Chronic multifocal osteomyelitis, hand
- humerus M86.32 — Chronic multifocal osteomyelitis, humerus
- ilium M86.38 — Chronic multifocal osteomyelitis, other site
- ischium M86.38 — Chronic multifocal osteomyelitis, other site
- metacarpus M86.34 — Chronic multifocal osteomyelitis, hand
- metatarsus M86.37 — Chronic multifocal osteomyelitis, ankle and foot
- multiple sites M86.39 — Chronic multifocal osteomyelitis, multiple sites
- neck M86.38 — Chronic multifocal osteomyelitis, other site
- pubic ramus [pubis] M86.38 — Chronic multifocal osteomyelitis, other site
- radius M86.33 — Chronic multifocal osteomyelitis, radius and ulna
- rib M86.38 — Chronic multifocal osteomyelitis, other site
- scapula M86.31 — Chronic multifocal osteomyelitis, shoulder
- skull M86.38 — Chronic multifocal osteomyelitis, other site
- tarsus M86.37 — Chronic multifocal osteomyelitis, ankle and foot
- tibia M86.36 — Chronic multifocal osteomyelitis, tibia and fibula
- toe M86.37 — Chronic multifocal osteomyelitis, ankle and foot
- ulna M86.33 — Chronic multifocal osteomyelitis, radius and ulna
- vertebra
- multiple sites M86.59 — Other chronic hematogenous osteomyelitis, multiple sites
- neck M86.58 — Other chronic hematogenous osteomyelitis, other site
- orbit H05.02 — Osteomyelitis of orbit
- petrous bone
- pubic ramus [pubis] M86.58 — Other chronic hematogenous osteomyelitis, other site
- radius M86.53 — Other chronic hematogenous osteomyelitis, radius and ulna
- rib M86.58 — Other chronic hematogenous osteomyelitis, other site
- scapula M86.51 — Other chronic hematogenous osteomyelitis, shoulder
- skull M86.58 — Other chronic hematogenous osteomyelitis, other site
- tarsus M86.57 — Other chronic hematogenous osteomyelitis, ankle and foot
- tibia M86.56 — Other chronic hematogenous osteomyelitis, tibia and fibula
- toe M86.57 — Other chronic hematogenous osteomyelitis, ankle and foot
- ulna M86.53 — Other chronic hematogenous osteomyelitis, radius and ulna
- vertebra
- humerus M86.62 — Other chronic osteomyelitis, humerus
- ilium M86.659 — Other chronic osteomyelitis, unspecified thigh
- ischium M86.659 — Other chronic osteomyelitis, unspecified thigh
- mandible M27.2 — Inflammatory conditions of jaws
- metacarpus M86.64 — Other chronic osteomyelitis, hand
- metatarsus M86.67 — Other chronic osteomyelitis, ankle and foot
- multifocal
- multiple sites M86.69 — Other chronic osteomyelitis, multiple sites
- neck M86.68 — Other chronic osteomyelitis, other site
- orbit H05.02 — Osteomyelitis of orbit
- petrous bone
- radius M86.63 — Other chronic osteomyelitis, radius and ulna
- rib M86.68 — Other chronic osteomyelitis, other site
- scapula M86.61 — Other chronic osteomyelitis, shoulder
- skull M86.68 — Other chronic osteomyelitis, other site
- tarsus M86.67 — Other chronic osteomyelitis, ankle and foot
- tibia M86.66 — Other chronic osteomyelitis, tibia and fibula
- toe M86.67 — Other chronic osteomyelitis, ankle and foot
- ulna M86.63 — Other chronic osteomyelitis, radius and ulna
- vertebra
Common questions about chronic osteomyelitis ICD-10 codes
What is the ICD-10 code for chronic osteomyelitis?
- M86.60 — Other chronic osteomyelitis, unspecified site. More specific codes apply when the documentation supports them: M86.40, M86.44, M86.41, M86.45 and others below.
What is the ICD-10 code for carpus chronic osteomyelitis?
- M86.64 — Other chronic osteomyelitis, hand (header code; choose a more specific subcode).
What is the ICD-10 code for clavicle chronic osteomyelitis?
- M86.61 — Other chronic osteomyelitis, shoulder (header code; choose a more specific subcode).
What is the ICD-10 code for femur chronic osteomyelitis?
- M86.65 — Other chronic osteomyelitis, thigh (header code; choose a more specific subcode).
What is the ICD-10 code for fibula chronic osteomyelitis?
- M86.66 — Other chronic osteomyelitis, tibia and fibula (header code; choose a more specific subcode).
What is the ICD-10 code for finger chronic osteomyelitis?
- M86.64 — Other chronic osteomyelitis, hand (header code; choose a more specific subcode).
What is the ICD-10 code for hematogenous nec chronic osteomyelitis?
- M86.50 — Other chronic hematogenous osteomyelitis, unspecified site.
Is M86.60 billable?
- Yes. M86.60 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M86.60 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M86.60 as a principal diagnosis.
Is M86.60 a CC or MCC?
- M86.60 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.