2026 ICD-10-CM Diagnosis Code M51.361Other intervertebral disc degeneration, lumbar region with lower extremity pain only

ICD-10-CM Codes›M00–M99›M50-M54›M51

ICD-10-CM M51.361
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M51.361 is a billable ICD-10-CM diagnosis code for other intervertebral disc degeneration, lumbar region with lower extremity pain only. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 551 through 552. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nervous system pain and pain syndromes and Spondylopathies/spondyloarthropathy (including infective).

Code Identity

ICD-10-CM Code
M51.361
Billable Status
Yes — Valid for Submission
Code Describes
Other intervertebral disc degeneration, lumbar region with lower extremity pain only
Short Description
Other intvrt disc degen, lum region with low extrm pain only
Parent Code
M51.36
Other intervertebral disc degeneration, lumbar region

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM50-M54Other dorsopathies
CategoryM51Thoracic, thoracolumbar, and lumbosacral intervertebral disc disorders
This CodeM51.361Other intervertebral disc degeneration, lumbar region with lower extremity pain only

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Other intervertebral disc degeneration, lumbar region with leg pain only
  • Other intervertebral disc degeneration, lumbar region with referred sclerotomal pain only

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS019
Nervous system pain and pain syndromes
Default principal diagnosis: inpatient No · outpatient No
CCSR MUS011
Spondylopathies/spondyloarthropathy (including infective)
Default principal diagnosis: inpatient Yes · outpatient Yes

Code History & ChangesHistory

Replacement M51.361 replaces the following previously assigned code(s):

  • M51.36 - Other intervertebral disc degeneration, lumbar region
FY 2025AddedAdded to the ICD-10-CM code setEffective October 1, 2024.
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M51.361Overview

Is M51.361 (Other intervertebral disc degeneration, lumbar region) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other intervertebral disc degeneration, lumbar region with lower extremity pain only on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M51.361 group to?

When other intervertebral disc degeneration, lumbar region with lower extremity pain only is the principal diagnosis on an inpatient stay, it groups to MS-DRG 551, 552, with relative weights from 0.9613 to 1.6761 depending on complications. Higher weights mean higher Medicare reimbursement.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.