Tarsometatarsal Joint - Intermediate Joint or Small Joint?

[emily.verbaere@gmail.com]

My coding team and I are going back and forth on whether the tarsometatarsal joint is classified as intermediate or small. One of our providers says it's intermediate.

Does anyone have a list, from a credible source, that classifies the joints into small, intermediate, and major?

 

[amyjph]

The CPT book with description. I know it doesn't specifically state TMT; but I think your provider is correct. I believe there may be a CPT Assistant about it if you have access to that.
For example if you look at 20600 it indicates small joint (eg fingers, toes). This would be DIP, PIP, MTP.
20605 intermediate joint states (eg temporomandibular, acromioclavicular, wrist, elbow, ankle, olecranon bursa).
Although there is a knowledge base CPT article that says the CMC of the hand is considered small, so.... could we translate that to the tarsals?
There is an old vignette that uses an example of MCP or MTP as small 20600.