2026 ICD-10-CM Diagnosis Code M96.4Postsurgical lordosis

ICD-10-CM Codes›M00–M99›M96›M96

ICD-10-CM M96.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M96.4 is a billable ICD-10-CM diagnosis code for postsurgical lordosis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 456 through 458, 551 through 552. Coders also document this condition as lordosis deformity of spine following excision of lamina of vertebra. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative musculoskeletal system complication and Scoliosis and other postural dorsopathic deformities.

Code Identity

ICD-10-CM Code
M96.4
Billable Status
Yes — Valid for Submission
Code Describes
Postsurgical lordosis
Short Description
Postsurgical lordosis
Same as the full description in the CMS dataset.
Parent Code
M96
Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM96Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified
CategoryM96Intraoperative and postprocedural complications and disorders of musculoskeletal system, not elsewhere classified
This CodeM96.4Postsurgical lordosis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Lordosis deformity of spine following excision of lamina of vertebra
  • Lordosis deformity of spine following surgical procedure

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Complication(s) (from) (of)
      • musculoskeletal system
        • postoperative (postprocedural)
          • lordosis
    • Complication(s) (from) (of)
      • orthopedic
        • postprocedural
          • postlaminectomy syndrome NEC
            • lordosis
    • Lordosis
      • postsurgical

Clinical ClassificationClinical

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

CCSR MUS037
Postprocedural or postoperative musculoskeletal system complication
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR MUS022
Scoliosis and other postural dorsopathic deformities
Default principal diagnosis: inpatient No · outpatient No

Convert M96.4 to ICD-9-CMHistory

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

ICD-9-CM
737.21 Postlaminectomy lordosis
Approximate The match is approximate rather than exact.
ICD-9-CM
737.22 Oth postsurgery lordosis
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 M96.4Overview

Is M96.4 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report postsurgical lordosis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M96.4 group to?

When postsurgical lordosis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 456, 457, 458, 551, 552, with relative weights from 0.9613 to 8.4034 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M96.4?

Under the General Equivalence Mappings, postsurgical lordosis converts to ICD-9-CM 737.21 (postlaminectomy lordosis) and 737.22 (oth postsurgery lordosis). The mapping is approximate, so confirm the match fits the documentation.

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.