M86.49 ICD-10-CM Code: Chronic osteomyelitis with draining sinus, multiple sites
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Inpatient Payment Groups (MS-DRG)
MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0 (FY2026), Appendix B.
- MS-DRG 456 — SPINAL FUSION EXCEPT CERVICAL WITH SPINAL CURVATURE, MALIGNANCY, INFECTION OR EXTENSIVE FUSIONS WITH MCC (MDC 08)
- MS-DRG 457 — SPINAL FUSION EXCEPT CERVICAL WITH SPINAL CURVATURE, MALIGNANCY, INFECTION OR EXTENSIVE FUSIONS WITH CC (MDC 08)
- MS-DRG 458 — SPINAL FUSION EXCEPT CERVICAL WITH SPINAL CURVATURE, MALIGNANCY, INFECTION OR EXTENSIVE FUSIONS WITHOUT CC/MCC (MDC 08)
- MS-DRG 539 — OSTEOMYELITIS WITH MCC (MDC 08)
- MS-DRG 540 — OSTEOMYELITIS WITH CC (MDC 08)
- MS-DRG 541 — OSTEOMYELITIS WITHOUT CC/MCC (MDC 08)
A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.
Risk Adjustment (CMS-HCC)
Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.
- HCC 92 — Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis
Other models: CMS-HCC V22 HCC 39
Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for M86.49 in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- osteomyelitis due to:
- echinococcus (B67.2)
- gonococcus (A54.43)
- salmonella (A02.24)
- postprocedural osteopathies (M96.-)
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- ostemyelitis of:
- orbit (H05.0-)
- petrous bone (H70.2-)
- vertebra (M46.2-)
Use Additional Code
Supplementary codes the tabular list directs you to add.
- Use additional code (B95-B97) to identify infectious agent
- Use additional code to identify major osseous defect, if applicable (M89.7-)
Nearest Codes in This Family
Official ICD-10-CM classifications closest to M86.49 in its code family, with their registry titles.
- M86.47 — Chronic osteomyelitis with draining sinus, ankle and foot
- M86.471 — Chronic osteomyelitis with draining sinus, right ankle and foot
- M86.472 — Chronic osteomyelitis with draining sinus, left ankle and foot
- M86.479 — Chronic osteomyelitis with draining sinus, unspecified ankle and foot
- M86.48 — Chronic osteomyelitis with draining sinus, other site
- M86.5 — Other chronic hematogenous osteomyelitis
- M86.50 — Other chronic hematogenous osteomyelitis, unspecified site
- M86.51 — Other chronic hematogenous osteomyelitis, shoulder
- M86.511 — Other chronic hematogenous osteomyelitis, right shoulder
- M86.512 — Other chronic hematogenous osteomyelitis, left shoulder
Indexed Clinical Terms (1)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis), chronic (or old), with draining sinus, multiple sites