2026 ICD-10-CM Diagnosis Code M47.10Other spondylosis with myelopathy, site unspecified

ICD-10-CM Codes›M00–M99›M45-M49›M47

ICD-10-CM M47.10
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M47.10 is a billable ICD-10-CM diagnosis code for other spondylosis with myelopathy, site unspecified. 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. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 74 closely related codes. The code is flagged as an unspecified code, since codes identifying laterality exist in the same family. Coders also document this condition as myelopathy due to spondylosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Spondylopathies/spondyloarthropathy (including infective).

Code Identity

ICD-10-CM Code
M47.10
Billable Status
Yes — Valid for Submission
Code Describes
Other spondylosis with myelopathy, site unspecified
Short Description
Other spondylosis with myelopathy, site unspecified
Same as the full description in the CMS dataset.
Parent Code
M47.1
Other spondylosis with myelopathy

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM45-M49Spondylopathies
CategoryM47Spondylosis
This CodeM47.10Other spondylosis with myelopathy, site unspecified

Code EditsBilling

Medicare Code Editor checks that affect claim validity for M47.10.

Unspecified codes
Unspecified codes exist in the ICD-10-CM classification for circumstances when documentation in the medical record does not provide the level of detail needed to support reporting a more specific code. However, in the inpatient setting, there should generally be very limited and rare circumstances for which the laterality (right, left, bilateral) of a condition is unable to be documented and reported. The following pages contain the list of unspecified ICD-10-CM diagnosis codes for which there is a more specific code to identify laterality (right, left, bilateral) within that code family.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Myelopathy due to spondylosis

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR MUS011
Spondylopathies/spondyloarthropathy (including infective)
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Spinal Cord Diseases

Your spinal cord is a bundle of nerves that runs down the middle of your back. It carries signals back and forth between your body and your brain. It is protected by your vertebrae, which are the bone disks that make up your spine.

Read the full article at MedlinePlus

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Convert M47.10 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
721.91 Spondylosis NOS w myelop
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About M47.10Overview

What is the ICD-10 code for other spondylosis with myelopathy, site unspecified?

The ICD-10-CM code for other spondylosis with myelopathy, site unspecified is M47.10 (sometimes written as M4710). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is M47.10 (Other spondylosis with myelopathy) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other spondylosis with myelopathy, site unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M47.10 group to?

When other spondylosis with myelopathy, site unspecified 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.

Is M47.10 a CC or MCC?

CMS lists M47.10 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 74 closely related codes in its exclusion list.

What is the ICD-9 equivalent of M47.10?

Under the General Equivalence Mappings, other spondylosis with myelopathy, site unspecified converts to ICD-9-CM 721.91 (spondylosis NOS w myelop). The mapping is approximate, so confirm the match fits the documentation.