M86.642

Other chronic osteomyelitis, left hand

Risk-adjusting (HCC)Billable code

HCC risk adjustment mapping

CMS-HCC V28

HCC92

Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis

CMS-HCC ESRD V24

HCC39

Bone/Joint/Muscle Infections/Necrosis

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

Inherited from M86Osteomyelitis

Excludes 1

osteomyelitis due to: echinococcus (B67.2) gonococcus (A54.43) salmonella (A02.24)

Excludes 2

ostemyelitis of: orbit (H05.0-) petrous bone (H70.2-) vertebra (M46.2-)

Use additional

code (B95-B97) to identify infectious agent code to identify major osseous defect, if applicable (M89.7-)

Inherited from M86-M90Other osteopathies

Excludes 1

postprocedural osteopathies (M96.-)

Inherited from chapter 13Diseases of the musculoskeletal system and connective tissue

Excludes 2

arthropathic psoriasis (L40.5-) certain conditions originating in the perinatal period (P04-P96) certain infectious and parasitic diseases (A00-B99) compartment syndrome (traumatic) (T79.A-) complications of pregnancy, childbirth and the puerperium (O00-O9A) congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99) endocrine, nutritional and metabolic diseases (E00-E88) injury, poisoning and certain other consequences of external causes (S00-T88) neoplasms (C00-D49) symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Note

Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition (M00-M25) Arthropathies (M00-M25) Includes: Disorders affecting predominantly peripheral (limb) joints (M40-M54) Dorsopathies (M40-M54) (M60-M79) Soft tissue disorders (M60-M79) (M80-M94) Osteopathies and chondropathies (M80-M94)

Official Guidelines for M86.642

FY 2026 ›

I.C.13Chapter-specific guidanceChapter 13: Diseases of the Musculoskeletal System and Connective

Subsections