ICD-10 Code for Arthritis
Also indexed as (acute) (chronic) (nonpyogenic) (subacute)
The ICD-10-CM code for arthritis is M19.90 — Unspecified osteoarthritis, unspecified site. This is the code the Alphabetic Index gives for arthritis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
BillableUnspecified
M19.90 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which arthritis code should you use?
The Alphabetic Index lists 221 codes under Arthritis, arthritic. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| blennorrhagic | A54.42 | Gonococcal arthritis |
| chylous | B74.9 | Filariasis, unspecified |
| epidemic erythema | A25.1 | Streptobacillosis |
| facet joint | M47.819 | Spondylosis without myelopathy or radiculopathy, site unspecified |
| gonococcal | A54.42 | Gonococcal arthritis |
| juvenile | M08.90 | Juvenile arthritis, unspecified, unspecified site |
| meningococcal | A39.83 | Meningococcal arthritis |
| mutilans | L40.52 | Psoriatic arthritis mutilans |
| mycotic NEC | B49 | Unspecified mycosis |
| ochronotic | E70.29 | Other disorders of tyrosine metabolism |
| pneumococcal | M00.10 | Pneumococcal arthritis, unspecified joint |
| postmeningococcal | A39.84 | Postmeningococcal arthritis |
| psoriatic | L40.50 | Arthropathic psoriasis, unspecified |
| pyogenic or pyemic | M00.9 | Pyogenic arthritis, unspecified |
| rheumatoid | M06.9 | Rheumatoid arthritis, unspecified |
| rubella | B06.82 | Rubella arthritis |
| scorbutic | E54 | Ascorbic acid deficiency |
| specified form NEC | M13.80 | Other specified arthritis, unspecified site |
| staphylococcal | M00.00 | Staphylococcal arthritis, unspecified joint |
| streptococcal NEC | M00.20 | Other streptococcal arthritis, unspecified joint |
| syphilitic | A52.16 | Charcot's arthropathy (tabetic) |
| syphilitica deformans | A52.16 | Charcot's arthropathy (tabetic) |
| temporomandibular joint | M26.64Not billable | Arthritis of temporomandibular joint |
| tuberculous | A18.02 | Tuberculous arthritis of other joints |
Arthritis Charcot's
| syringomyelic | G95.0 | Syringomyelia and syringobulbia |
Arthritis due to or associated with
| acromegaly | E22.0 | Acromegaly and pituitary gigantism |
| caisson disease | T70.3Not billable | Caisson disease [decompression sickness] |
| dracontiasis | B72 | Dracunculiasis |
| erysipelas | A46 | Erysipelas |
| filariasis NOS | B74.9 | Filariasis, unspecified |
| glanders | A24.0 | Glanders |
| helminthiasis | B83.9 | Helminthiasis, unspecified |
| hemophilia | D66 | Hereditary factor VIII deficiency |
| Henoch-purpura | D69.0 | Allergic purpura |
| human parvovirus | B97.6 | Parvovirus as the cause of diseases classified elsewhere |
| leprosy | A30.9 | Leprosy, unspecified |
| Lyme disease | A69.23 | Arthritis due to Lyme disease |
| mycobacteria | A31.8 | Other mycobacterial infections |
| parasitic disease NEC | B89 | Unspecified parasitic disease |
| paratyphoid fever | A01.4 | Paratyphoid fever, unspecified |
| rat bite fever | A25.1 | Streptobacillosis |
| respiratory disorder NOS | J98.9 | Respiratory disorder, unspecified |
| serum sickness | T80.69Not billable | Other serum reaction due to other serum |
| syringomyelia | G95.0 | Syringomyelia and syringobulbia |
| typhoid fever | A01.04 | Typhoid arthritis |
Arthritis in
| acromegaly | E22.0 | Acromegaly and pituitary gigantism |
| amyloidosis | E85.4 | Organ-limited amyloidosis |
| bacterial disease | A49.9 | Bacterial infection, unspecified |
| Behçet's syndrome | M35.2 | Behcet's disease |
| caisson disease | T70.3Not billable | Caisson disease [decompression sickness] |
| crystals | M11.9 | Crystal arthropathy, unspecified |
| dermatoarthritis, lipoid | E78.81 | Lipoid dermatoarthritis |
| dracontiasis | B72 | Dracunculiasis |
| endocrine disorder NEC | E34.9 | Endocrine disorder, unspecified |
| enteritis, infectious NEC | A09 | Infectious gastroenteritis and colitis, unspecified |
| helminthiasis NEC | B83.9 | Helminthiasis, unspecified |
| hemochromatosis | E83.118 | Other hemochromatosis |
| hemoglobinopathy NEC | D58.2 | Other hemoglobinopathies |
| hemophilia NEC | D66 | Hereditary factor VIII deficiency |
| Hemophilus influenzae | M00.8Not billable | Arthritis and polyarthritis due to other bacteria |
| Henoch purpura | D69.0 | Allergic purpura |
| hyperparathyroidism NEC | E21.3 | Hyperparathyroidism, unspecified |
| hypersensitivity reaction NEC | T78.49Not billable | Other allergy |
| hypogammaglobulinemia | D80.1 | Nonfamilial hypogammaglobulinemia |
| hypothyroidism NEC | E03.9 | Hypothyroidism, unspecified |
| leprosy | A30.9 | Leprosy, unspecified |
| leukemia NEC | C95.9Not billable | Leukemia, unspecified |
| lipoid dermatoarthritis | E78.81 | Lipoid dermatoarthritis |
| Lyme disease | A69.23 | Arthritis due to Lyme disease |
| Mediterranean fever, familial | M04.1 | Periodic fever syndromes |
| Meningococcus | A39.83 | Meningococcal arthritis |
| metabolic disorder NEC | E88.9 | Metabolic disorder, unspecified |
| multiple myelomatosis | C90.0Not billable | Multiple myeloma |
| mumps | B26.85 | Mumps arthritis |
| mycosis NEC | B49 | Unspecified mycosis |
| myelomatosis | C90.0Not billable | Multiple myeloma |
| neurological disorder NEC | G98.0 | Neurogenic arthritis, not elsewhere classified |
| ochronosis | E70.29 | Other disorders of tyrosine metabolism |
| O'nyong-nyong | A92.1 | O'nyong-nyong fever |
| parasitic disease NEC | B89 | Unspecified parasitic disease |
| paratyphoid fever | A01.4 | Paratyphoid fever, unspecified |
| psoriasis | L40.50 | Arthropathic psoriasis, unspecified |
| respiratory disorder NEC | J98.9 | Respiratory disorder, unspecified |
| reticulosis, malignant | C86.0Not billable | Extranodal NK/T-cell lymphoma, nasal type |
| rubella | B06.82 | Rubella arthritis |
| Salmonella | A02.23 | Salmonella arthritis |
| sarcoidosis | D86.86 | Sarcoid arthropathy |
| sporotrichosis | B42.82 | Sporotrichosis arthritis |
| syringomyelia | G95.0 | Syringomyelia and syringobulbia |
| thalassemia NEC | D56.9 | Thalassemia, unspecified |
| typhoid fever | A01.04 | Typhoid arthritis |
| viral disease NEC | B34.9 | Viral infection, unspecified |
Arthritis juvenile
| ankle | M08.97Not billable | Juvenile arthritis, unspecified, ankle and foot |
| elbow | M08.92Not billable | Juvenile arthritis, unspecified, elbow |
| foot joint | M08.97Not billable | Juvenile arthritis, unspecified, ankle and foot |
| hand joint | M08.94Not billable | Juvenile arthritis, unspecified, hand |
| hip | M08.95Not billable | Juvenile arthritis, unspecified, hip |
| knee | M08.96Not billable | Juvenile arthritis, unspecified, knee |
| multiple site | M08.99 | Juvenile arthritis, unspecified, multiple sites |
| pauciarticular | M08.40 | Pauciarticular juvenile rheumatoid arthritis, unspecified site |
| psoriatic | L40.54 | Psoriatic juvenile arthropathy |
| shoulder | M08.91Not billable | Juvenile arthritis, unspecified, shoulder |
| specified site NEC | M08.9A | Juvenile arthritis, unspecified, other specified site |
| vertebra | M08.98 | Juvenile arthritis, unspecified, vertebrae |
| specified type NEC | M08.80 | Other juvenile arthritis, unspecified site |
| wrist | M08.93Not billable | Juvenile arthritis, unspecified, wrist |
Arthritis neuropathic
Arthritis pneumococcal
| ankle | M00.17Not billable | Pneumococcal arthritis, ankle and foot |
| elbow | M00.12Not billable | Pneumococcal arthritis, elbow |
| hand joint | M00.14Not billable | Pneumococcal arthritis, hand |
| hip | M00.15Not billable | Pneumococcal arthritis, hip |
| knee | M00.16Not billable | Pneumococcal arthritis, knee |
| multiple site | M00.19 | Pneumococcal polyarthritis |
| shoulder | M00.11Not billable | Pneumococcal arthritis, shoulder |
| vertebra | M00.18 | Pneumococcal arthritis, vertebrae |
| wrist | M00.13Not billable | Pneumococcal arthritis, wrist |
Arthritis pyogenic or pyemic
| bacterial NEC | M00.80 | Arthritis due to other bacteria, unspecified joint |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources