M13.1

Non-Billable
ChapterM00–M99
Ranksubcategory
Official Description

Monoarthritis, not elsewhere classified

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:

Clinical Hierarchy

BillableHas subcodes
CH13Diseases of the musculoskeletal system and connective tissue (M00-M99)
M05-M14Inflammatory polyarthropathies (M05-M14)
M13Other arthritis
M13.1Monoarthritis, not elsewhere classifiedNot billable
M13.10Monoarthritis, not elsewhere classified, unspecified siteBillable
M13.11Monoarthritis, not elsewhere classified, shoulderSubcodes
M13.12Monoarthritis, not elsewhere classified, elbowSubcodes
M13.13Monoarthritis, not elsewhere classified, wristSubcodes
M13.14Monoarthritis, not elsewhere classified, handSubcodes
M13.15Monoarthritis, not elsewhere classified, hipSubcodes
M13.16Monoarthritis, not elsewhere classified, kneeSubcodes
M13.17Monoarthritis, not elsewhere classified, ankle and footSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to M13.1:

categoryM13
Other arthritis
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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