Chronic Osteomyelitis of Mandible/Maxilla

DC 5000 (via DC 9900 rate-as) — "Of the pelvis, vertebrae, or extending into major joints, or with multiple localization or with long history of intractability and debility, anemia, amyloid liver changes, or other continuous constitutional symptoms" = 100%. (Verbatim § 4.71a DC 5000.)

DC 5000 (via DC 9900 rate-as) — "Frequent episodes, with constitutional symptoms" = 60%. (Verbatim § 4.71a DC 5000.) NOTE: Per DC 5000 Note 1, the 60% constitutional-symptoms rating is NOT subject to the amputation rule. Most well-documented chronic-recurrent jaw osteomyelitis with systemic involvement (fever, weight loss, anemia) lands at this tier.

DC 5000 (via DC 9900 rate-as) — "With definite involucrum or sequestrum, with or without discharging sinus" = 30%. (Verbatim § 4.71a DC 5000.) Chronic osteomyelitis with imaging-confirmed sequestrum or involucrum — frequently the modal rating for refractory MRONJ / radiation-induced cases.

DC 5000 (via DC 9900 rate-as) — "With discharging sinus or other evidence of active infection within the past 5 years" = 20%. (Verbatim § 4.71a DC 5000.) For chronic-recurrent disease, this tier captures intermittently active phases. Per Note 2: "The 20 percent rating on the basis of activity within the past 5 years is not assignable following the initial infection of active osteomyelitis with no subsequent reactivation. The prerequisite for this historical rating is an established recurrent osteomyelitis."

DC 5000 (via DC 9900 rate-as) — "Inactive, following repeated episodes, without evidence of active infection in past 5 years" = 10%. (Verbatim § 4.71a DC 5000.) Per Note 2: requires 2 or more documented episodes following the initial infection.