2027 ICD-10-CM Diagnosis Code M53.2X1Spinal instabilities, occipito-atlanto-axial region

ICD-10-CM Codes›M00–M99›M50-M54›M53

ICD-10-CM M53.2X1
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

M53.2X1 is a billable ICD-10-CM diagnosis code for spinal instabilities, occipito-atlanto-axial region. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 564 through 566. Coders also document this condition as atlantoaxial instability. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Spondylopathies/spondyloarthropathy (including infective).

Code Identity

ICD-10-CM Code
M53.2X1
Billable Status
Yes — Valid for Submission
Code Describes
Spinal instabilities, occipito-atlanto-axial region
Short Description
Spinal instabilities, occipito-atlanto-axial region
Same as the full description in the CMS dataset.
Parent Code
M53.2X
Spinal instabilities

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM50-M54Other dorsopathies
CategoryM53Other and unspecified dorsopathies, not elsewhere classified
This CodeM53.2X1Spinal instabilities, occipito-atlanto-axial region

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Atlantoaxial instability
  • Instability of atlantooccipital joint
  • Os odontoideum

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to M53.2X1: its own notes plus those printed at block M50-M54 and Chapter 13. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block M50-M54 Other dorsopathies applies to 133 codes
  • current injury - see injury of spine by body region
  • discitis NOS (M46.4-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • arthropathic psoriasis (L40.5-)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • compartment syndrome (traumatic) (T79.A-)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Notes

General instructions on how these codes are used.

From Chapter 13 (M00-M99) Diseases of the musculoskeletal system and connective tissue applies to 6,687 codes
  • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name M53.2X1, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming M53.2X1: they are not reported together with it, unless the two conditions are unrelated.

  • G55 Nerve root and plexus compressions in diseases classified elsewhere
    nerve root compression (due to) (in) dorsopathies (M53.-, M54.-) names M53.-, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming M53.2X1: its condition is not part of those codes, and both may be reported when the patient has both.

  • M25.3 Other instability of joint
    spinal instabilities (M53.2-) names M53.2-, which includes 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

Neck Injuries and Disorders

Any part of your neck - muscles, bones, joints, tendons, ligaments, or nerves - can cause neck problems. Neck pain is very common. Pain may also come from your shoulder, jaw, head, or upper arms.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert M53.2X1 to ICD-9-CMHistory

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

ICD-9-CM
718.88 Jt derangment NEC-oth jt
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About M53.2X1Overview

What is the ICD-10 code for spinal instabilities, occipito-atlanto-axial region?

The ICD-10-CM code for spinal instabilities, occipito-atlanto-axial region is M53.2X1 (sometimes written as M532X1). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is M53.2X1 (Spinal instabilities) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report spinal instabilities, occipito-atlanto-axial region on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does M53.2X1 group to?

When spinal instabilities, occipito-atlanto-axial region is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 566, 565, with relative weights from 0.7374 to 1.4909 depending on complications. Higher weights mean higher Medicare reimbursement.

Can M53.2X1 be reported with a code from M46.4?

Not as a rule. The Excludes1 note at block M50-M54, which applies to M53.2X1, lists "discitis NOS (M46.4-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of M53.2X1?

Under the General Equivalence Mappings, spinal instabilities, occipito-atlanto-axial region converts to ICD-9-CM 718.88 (jt derangment NEC-oth jt). The mapping is approximate, so confirm the match fits the documentation.