General ICD-10 codes

Staphylococcal arthritis affecting a joint that has not been specified by site or laterality in the clinical documentation.

M00.10 identifies pneumococcal arthritis affecting a joint that is not specified by name or anatomical site in the clinical documentation.

M00.20 classifies septic joint infection caused by streptococcal species other than Streptococcus pneumoniae (Group A, B, C, G, or viridans group) when the affected joint is not documented or cannot be specified.

Bacterial joint infection caused by organisms other than staphylococci, pneumococci, streptococci, or gram-negative bacteria, with the specific joint not documented or not determinable.

Reactive joint disease that develops as a consequence of intestinal bypass surgery, coded here when the specific joint site is not documented.

Postdysenteric arthropathy at an unspecified anatomical site — joint inflammation arising after a dysenteric illness when the specific joint involved is not documented.

M02.20 identifies arthropathy that develops as a consequence of vaccination when the affected joint site is not documented or not specified in the medical record.

Reactive arthritis (Reiter's disease) without a documented or determinable joint site — used when the affected anatomical location is not specified in the clinical record.

M02.80 identifies reactive arthritis caused by an infection elsewhere in the body — falling outside the specific Reiter's disease or postdysenteric categories — when no joint site is documented or determinable.

Rheumatoid vasculitis occurring alongside seropositive rheumatoid arthritis, coded without specification of which joint site is involved.

Rheumatoid heart disease — encompassing rheumatoid carditis, endocarditis, myocarditis, and pericarditis — occurring in a patient with seropositive rheumatoid arthritis, where the joint site affected is not specified in the documentation.

M05.40 captures rheumatoid myopathy occurring as a systemic manifestation of rheumatoid factor-positive rheumatoid arthritis when no specific joint site is documented.

Rheumatoid polyneuropathy occurring alongside rheumatoid arthritis, reported when the affected joint site is not specified in the clinical documentation.

Rheumatoid arthritis with positive rheumatoid factor affecting an unspecified joint site, with documented involvement of other organs or body systems beyond the joints themselves.

Seropositive rheumatoid arthritis confirmed by positive rheumatoid factor, with no documented specific joint site and no evidence of extra-articular organ or systemic involvement.

Seronegative rheumatoid arthritis where the affected joint site is not documented or cannot be specified — used when RF (rheumatoid factor) is negative or absent from lab results and no single anatomic site is identified.

Rheumatoid bursitis at an unspecified anatomical site — bursal inflammation occurring in the context of rheumatoid disease where the treating provider has not documented or identified the specific joint location.

Rheumatoid nodule at an unspecified anatomic site — a firm subcutaneous granulomatous lesion associated with rheumatoid arthritis when the treating provider has not documented or identified the specific body location.

M06.80 classifies a form of rheumatoid arthritis that falls outside the specifically named RA subtypes (seronegative, Still's disease, rheumatoid bursitis, rheumatoid nodule) but without documentation of a specific anatomical site.

Systemic-onset juvenile rheumatoid arthritis (Still's disease) coded without specification of which joint or body site is involved — use when systemic features are documented but joint site is not.

Pauciarticular juvenile rheumatoid arthritis affecting an unspecified joint site — meaning four or fewer joints are involved and the specific joint(s) have not been documented in the clinical record.

M08.80 classifies juvenile arthritis that falls outside the specifically defined subtypes (systemic, pauciarticular, seronegative polyarticular, seropositive polyarticular, psoriatic, or enthesitis-related) and where no specific joint site is documented or identifiable.

Juvenile arthritis of unspecified type affecting an unspecified anatomical site — the least specific billable code in the M08.9x family, used only when both the arthritis subtype and the involved joint are undocumented.

M10.00 identifies idiopathic (primary) gout without a documented anatomic site — no laterality, no specific joint named in the record.

Gout caused by lead toxicity, assigned when the affected joint or anatomical site is not documented or cannot be specified.

Acute gout flare triggered by a medication or other pharmacologic agent, reported when the affected joint site is not documented or cannot be specified.

M10.30 identifies acute gout caused by renal impairment when the affected joint site is not documented or cannot be specified.

Secondary gout arising from an identifiable underlying cause other than renal impairment or drug/toxin exposure, reported when the specific affected joint site is not documented or cannot be determined.

Hydroxyapatite deposition disease (HADD) at an unspecified anatomical site — calcium hydroxyapatite crystals deposited in or around a joint without documentation of which joint is affected.

M11.20 captures calcium pyrophosphate crystal deposition in cartilage (chondrocalcinosis) when the affected joint site is not documented or cannot be specified — encompassing both sporadic and secondary forms that don't qualify as familial chondrocalcinosis.

Crystal-induced joint inflammation caused by a deposit type other than urate or calcium pyrophosphate dihydrate, with the affected joint not documented or not specified in the record.

M12.00 identifies chronic postrheumatic arthropathy (Jaccoud arthropathy) when the affected joint site is not specified in documentation. It captures a persistent, deforming joint condition that follows an episode of rheumatic fever or other inflammatory arthritis, but the record lacks a named anatomical location.

M12.10 identifies Kaschin-Beck disease affecting an unspecified anatomical site — a chronic, disabling osteochondrodysplasia characterized by osteosclerosis, cone-shaped metaphyses, and diaphyseal shortening with no documented joint location in the record.

Pigmented villonodular synovitis (PVNS) affecting a joint that is not specified by anatomic site in the clinical documentation.

Palindromic rheumatism with no documented joint site — use only when the affected joint(s) cannot be identified from the encounter documentation.

Periodic, self-resolving joint effusion of unspecified site, classified under other and unspecified arthropathy (M12.4), where the affected joint is not documented.

Traumatic arthropathy affecting a joint where no specific anatomical site has been documented in the medical record.

Arthropathy that falls under a recognized specific category but lacks sufficient documentation to assign a more granular site-specific code — used when joint involvement cannot be localized to a single named anatomical site.

Single-joint arthritis that does not fit any more specific classification category, with the affected joint undocumented or unspecified.

M13.80 classifies a named arthritis type that falls outside other defined arthritis categories when the affected joint site is not documented or is not the focus of the encounter.

Charcot's joint (neuropathic arthropathy) at an unspecified anatomic site — use only when the affected joint is not documented in the medical record.

Joint disease arising as a manifestation of another specified underlying systemic condition, coded when the affected joint site is not documented or cannot be determined.

Degenerative joint disease documented without specification of the affected joint, body region, or OA subtype (primary, post-traumatic, or secondary).

Primary osteoarthritis affecting an unspecified anatomical site — degenerative joint disease of idiopathic origin where no specific joint or region has been documented in the clinical record.

Post-traumatic osteoarthritis at an unspecified anatomic site, arising as a sequela of prior joint injury when the specific joint is not documented in the medical record.

Secondary osteoarthritis at an unspecified anatomic site — osteoarthritis arising from an identifiable underlying cause when the affected joint is not documented.

M21.00 identifies an acquired valgus (outward angulation) deformity of a limb when the specific anatomical site is not documented or cannot be determined from the record.

Acquired varus (inward angulation) deformity of a limb with no specific anatomical site documented in the medical record.

M21.20 identifies an acquired flexion deformity without documentation of a specific anatomical site. Use this code only when the affected joint or limb region is genuinely unspecified in the clinical record.

Loose body in an unspecified joint — fragments of bone and/or cartilage that float freely within a joint space, with the affected joint not documented or identifiable from the record.

M24.10 classifies articular cartilage disorders that fall outside other specifically defined cartilage conditions — such as chondrocalcinosis or internal derangement of the knee — when the affected joint site is not documented.

M24.20 captures a ligament disorder — including instability from old ligament injury or ligamentous laxity NOS — when no anatomical site is documented in the record.

Pathological dislocation of a joint that occurs due to disease or pathological process rather than acute trauma, reported when the specific joint is not documented or does not have a more precise code available.

Recurrent dislocation of a joint where the specific joint has not been documented or identified in the medical record.

Joint contracture at an unspecified anatomical site — used when the affected joint is not documented in the medical record.

M24.60 identifies ankylosis — abnormal fusion or immobility of a joint — when the specific joint affected is not documented or cannot be determined from the record.

Intra-articular hemorrhage at a joint site that has not been identified or documented by the treating provider.

M25.10 identifies a fistula arising from a joint when the specific joint has not been documented or cannot be determined from the medical record.

M25.20 identifies a flail joint condition at an unspecified anatomical site — a joint that has lost all active and passive motor control due to paralysis, severe ligamentous destruction, or neuromuscular compromise, rendering it abnormally loose and functionally unstable.

Joint instability that does not fit a more specific category and lacks documentation of which joint is affected — the least specific billable code in the M25.3 family.