M19.9 Osteoarthritis, unspecified siteNon-billable header with 4 child codes.
M19.90 Unspecified osteoarthritis, unspecified siteM19.91 Primary osteoarthritis, unspecified siteM19.92 Post-traumatic osteoarthritis, unspecified siteM19.93 Secondary osteoarthritis, unspecified siteM12 Other and unspecified arthropathy ("arthrosis (M15-M19)")M13 Other arthritis ("arthrosis (M15-M19)")M13 Other arthritis ("osteoarthritis (M15-M19)")M13.8 Other specified arthritis ("osteoarthritis (M15-M19)")M15 Polyosteoarthritis ("bilateral involvement of single joint (M16-M19)")M19.27 Secondary osteoarthritis, ankle and footM19.271 Secondary osteoarthritis, right ankle and footM19.272 Secondary osteoarthritis, left ankle and footM19.279 Secondary osteoarthritis, unspecified ankle and footM19.29 Secondary osteoarthritis, other specified siteM19.9 Osteoarthritis, unspecified site (this code)M19.90 Unspecified osteoarthritis, unspecified siteM19.91 Primary osteoarthritis, unspecified siteM19.92 Post-traumatic osteoarthritis, unspecified siteM19.93 Secondary osteoarthritis, unspecified site