Unfortunately, ICD-10 does not really cover the problem of Tendonitis ("inflammation of the tendon") or Tendinopathy ("degeneration or wearing of the tendon," which could include partial or complete tearing) well at all. I have seen in other Forums that Rotator Cuff "Tendonitis" has been coded the same as "Bursitis," i.e. M75.5_, which has apparently not been rejected by insurers. "Tendinopathy" in most Orthopedic Surgeon's "language" would indicate/imply some degree of wearing out/damage/tear of the tendon, in addition to whatever inflammation (Tendonitis) may be present. If there is documented evidence anywhere of Rotator Cuff Tear (MRI or Surgical Report, etc.), then I would recommend using the Tear Codes, M75.11 _ or M75.12 _. If it is tendinous "Degeneration" without evidence of a tear, then M75.8 _ would be the best choice. I would recommend clarification from your physician as to what he means.
Sincerely submitted, Alan Pechacek, M.D.