Is ICD-10-CM code M86.66 billable?

No, M86.66 (Other chronic osteomyelitis, tibia and fibula) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code M86.66 belong to?

M86.66 belongs to Chapter 13 of the ICD-10-CM tabular list: M00–M99 — Diseases of the Musculoskeletal System and Connective Tissue.

M86.66

Non-Billable

ChapterM00–M99

Ranksubcategory

Description

Other chronic osteomyelitis, tibia and fibula

Use a more specific code (3 billable)

M86.661Other chronic osteomyelitis, right tibia and fibula M86.662Other chronic osteomyelitis, left tibia and fibula M86.669Other chronic osteomyelitis, unspecified tibia and fibula

Metadata & Insights

•Non-billable category (requires more specific sub-code).
•Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99).

General instructions are available for the parent sections:

View CH13 Notes View M86-M90 Notes View M86 Notes

Clinical Hierarchy

BillableHas subcodes

CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)

M86-M90Other osteopathies (M86-M90)

M86Osteomyelitis

M86.6Other chronic osteomyelitis

M86.66Other chronic osteomyelitis, tibia and fibulaNot billable

M86.661Other chronic osteomyelitis, right tibia and fibulaBillable

M86.662Other chronic osteomyelitis, left tibia and fibulaBillable

M86.669Other chronic osteomyelitis, unspecified tibia and fibulaBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M86.66:

categoryM86

Osteomyelitis

View context instructions

blockM86-M90

Other osteopathies (M86-M90)

View context instructions

chapterCH13

Diseases of the musculoskeletal system and connective tissue (M00-M99)

View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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