Is ICD-10-CM code M86.21 billable?

No, M86.21 (Subacute osteomyelitis, shoulder) 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 M86.21 belong to?

M86.21 belongs to Chapter 13 of the ICD-10-CM tabular list: M00–M99 — Diseases of the Musculoskeletal System and Connective Tissue.

M86.21

Non-Billable

ChapterM00–M99

Ranksubcategory

Description

Subacute osteomyelitis, shoulder

Use a more specific code (3 billable)

M86.211Subacute osteomyelitis, right shoulder M86.212Subacute osteomyelitis, left shoulder M86.219Subacute osteomyelitis, unspecified shoulder

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

M86.2Subacute osteomyelitis

M86.21Subacute osteomyelitis, shoulderNot billable

M86.211Subacute osteomyelitis, right shoulderBillable

M86.212Subacute osteomyelitis, left shoulderBillable

M86.219Subacute osteomyelitis, unspecified shoulderBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M86.21:

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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