2026 ICD-10-CM Diagnosis Code Q76.5Cervical rib

ICD-10-CM Codes›Q00-Q99›Q65-Q79›Q76

ICD-10-CM Q76.5
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q76.5 is a billable ICD-10-CM diagnosis code for cervical rib. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 564 through 566. The code is exempt from POA reporting. Coders also document this condition as accessory rib. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Musculoskeletal congenital conditions.

Code Identity

ICD-10-CM Code
Q76.5
Billable Status
Yes — Valid for Submission
Code Describes
Cervical rib
Short Description
Cervical rib
Same as the full description in the CMS dataset.
Parent Code
Q76
Congenital malformations of spine and bony thorax

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ65-Q79Congenital malformations and deformations of the musculoskeletal system
CategoryQ76Congenital malformations of spine and bony thorax
This CodeQ76.5Cervical rib

Present on Admission (POA)Billing

Q76.5 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Accessory rib
  • Cervical rib

Tabular List NotesGuidance

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

Inclusion Terms

  • Supernumerary rib in cervical region

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.

    • Accessory(congenital)
      • rib
        • cervical
    • Anomaly, anomalous(congenital) (unspecified type)
      • rib
        • cervical
    • Cervical
      • rib
    • Deformity
      • rib (acquired)
        • congenital
          • cervical
    • Extra
      • rib
        • cervical
    • Malposition
      • congenital
        • rib (cage)
          • supernumerary in cervical region
    • Rib
      • cervical
    • Supernumerary(congenital)
      • rib
        • cervical or first (syndrome)
    • Syndrome
      • cervical (root)
        • rib

Clinical ClassificationClinical

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

CCSR MAL008
Musculoskeletal congenital conditions
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Cervical Rib

    a supernumerary rib developing from an abnormal enlargement of the costal element of the c7 vertebra. this anomaly is found in 1-2% of the population and can put pressure on adjacent structures causing cervical rib syndrome; thoracic outlet syndrome; or other conditions.

  • Cervical Rib Syndrome

    a condition associated with compression of the brachial plexus; subclavian artery; and subclavian vein at the thoracic outlet and caused by a complete or incomplete anomalous cervical rib or fascial band connecting the tip of a cervical rib with the first thoracic rib. clinical manifestations may include pain in the neck and shoulder which radiates into the upper extremity, paresis or paralysis of brachial plexus innervated muscles; sensory loss; paresthesias; ischemia; and edema. (adams et al., principles of neurology, 6th ed, p214)

Patient EducationClinical

Birth Defects

A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the first 3 months of pregnancy. One out of every 33 babies in the United States is born with a birth defect.

The full article covers:

  • What are birth defects?
  • What causes birth defects?
  • Who is at risk of having a baby with birth defects?
  • How are birth defects diagnosed?
  • What are the treatments for birth defects?
  • Can birth defects be prevented?

Read the full article at MedlinePlus

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

Convert Q76.5 to ICD-9-CMHistory

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

ICD-9-CM
756.2 Cervical rib
Exact Match The mapping is direct, with no qualifiers.

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 Q76.5Overview

Is Q76.5 (Congenital malformations of spine and bony thorax) a billable code?

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

What MS-DRG does Q76.5 group to?

When cervical rib is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 565, 566, with relative weights from 0.7493 to 1.5436 depending on complications. Higher weights mean higher Medicare reimbursement.

Is Q76.5 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for cervical rib on inpatient claims.

What is the ICD-9 equivalent of Q76.5?

Under the General Equivalence Mappings, cervical rib converts to ICD-9-CM 756.2 (cervical rib). The mapping is a direct match.

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.