HCPCS Level II · Medical services and quality measures
M1046Functional status measured by the oxford knee score (oks) at one year (9 to 15 months) postoperatively was less than 37 or the knee injury and osteoarthritis outcome score joint replacement (koos, jr.) was less than 71 postoperatively
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Source: CMS HCPCS quarterly update, October 2026. Page updated September 29, 2026.
About M1046
M1046 is an HCPCS Level II code in the M series (medical services and quality measures), describing functional status measured by the oxford knee score (oks) at one year (9 to 15 months) postoperatively was less than 37 or the knee injury and osteoarthritis outcome score joint replacement (koos, jr.) was less than 71 postoperatively.
It was added to HCPCS effective 01/01/2019, and its current record took effect 01/01/2021.
Its Medicare coverage code is "C", meaning coverage is left to the Medicare contractor's judgment.
Details
- Short description
- Fs oks 9-15mo < 37 < 71
- Date added
- 01/01/2019
- Action effective
- 01/01/2021
- BETOS
- Z2
Related M10xx codes
- M1003Tb screening performed and results interpreted within twelve months prior to initiation of first-time biologic and/or immune response modifier therapy
- M1004Documentation of medical reason for not screening for tb or interpreting results (i.e., patient positive for tb and documentation of past treatment; patient who has recently completed a course of anti-tb therapy)
- M1005Tb screening not performed or results not interpreted, reason not given
- M1006Disease activity not assessed, reason not given
- M1007>=50% of total number of a patient's outpatient ra encounters assessed
- M1008<50% of total number of a patient's outpatient ra encounters assessed
- M1009Discharge/discontinuation of the episode of care documented in the medical record
- M1010Discharge/discontinuation of the episode of care documented in the medical record
- M1011Discharge/discontinuation of the episode of care documented in the medical record
- M1012Discharge/discontinuation of the episode of care documented in the medical record
- M1013Discharge/discontinuation of the episode of care documented in the medical record
- M1014Discharge/discontinuation of the episode of care documented in the medical record
Common questions about M1046
Is HCPCS M1046 still valid?
- Yes. M1046 is active in the CMS October 2026 HCPCS file.
Does Medicare cover M1046?
- Its coverage code is "C": coverage is left to the Medicare contractor's judgment. Check the local coverage determination for your region.