M13.1
M13.1 — Monoarthritis, not elsewhere classified
Non-billable headerICD-10-CM
M13.1 is a non-billable header ICD-10-CM code for monoarthritis, not elsewhere classified. It cannot be billed on its own: choose one of the more specific child codes below.
Risk adjustment
M13.1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead M13.1
8 child codes. Green means billable.
- M13.10Monoarthritis, not elsewhere classified, unspecified site
- M13.11Monoarthritis, not elsewhere classified, shoulder
- M13.12Monoarthritis, not elsewhere classified, elbow
- M13.13Monoarthritis, not elsewhere classified, wrist
- M13.14Monoarthritis, not elsewhere classified, hand
- M13.15Monoarthritis, not elsewhere classified, hip
- M13.16Monoarthritis, not elsewhere classified, knee
- M13.17Monoarthritis, not elsewhere classified, ankle and foot
Related codes at this level
Codes that share M13. If M13.1 is not quite right, the correct code is usually one of these.
Questions about M13.1
- Is M13.1 a billable ICD-10-CM code?
- No. M13.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does M13.1 sit in the tabular list?
- Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Inflammatory polyarthropathies (M05-M14).