2026 ICD-10-CM Diagnosis Code Q76.6Other congenital malformations of ribs

ICD-10-CM Codes›Q00-Q99›Q65-Q79›Q76

ICD-10-CM Q76.6
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q76.6 is a billable ICD-10-CM diagnosis code for other congenital malformations of ribs. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Musculoskeletal congenital conditions.

Code Identity

ICD-10-CM Code
Q76.6
Billable Status
Yes — Valid for Submission
Code Describes
Other congenital malformations of ribs
Short Description
Other congenital malformations of ribs
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 CodeQ76.6Other congenital malformations of ribs

Present on Admission (POA)Billing

Q76.6 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 left rib
  • Accessory rib
  • Accessory right rib
  • Agenesis of rib
  • Anal atresia
  • Aplasia of bone of thorax
  • Aplasia of rib
  • Autosomal dominant spondylocostal dysostosis
  • Bilateral accessory ribs
  • Cerebro-costo-mandibular syndrome
  • Congenital abnormal fusion of rib cartilage
  • Congenital abnormal shape of rib
  • Congenital absence of rib
  • Congenital anomaly of rib
  • Congenital anomaly of rib cartilage
  • Congenital atresia of pharynx
  • Congenital bent rib
  • Congenital branched rib
  • Congenital branched rib cartilage
  • Congenital focal enlargement of rib
  • Congenital fusion of ribs
  • Congenital hypoplasia of bone of thorax
  • Congenital hypoplasia of bone structure of first rib
  • Congenital hypoplasia of rib
  • Congenital malposition of rib
  • Congenital misalignment of rib
  • Congenital thickening of rib
  • Discontinuous rib
  • Full supernumerary rib
  • Imperforate oropharynx, costovertebral anomalies syndrome
  • Incomplete ossification of rib
  • Intercostal rib
  • Interrupted ossification
  • Lack of ossification of rib
  • Short supernumerary rib
  • Spondylocostal dysostosis with anal atresia and genitourinary malformation syndrome
  • Thin rib
  • Thoracic dysplasia and hydrocephalus syndrome
  • Wavy constrictions of ribs

Tabular List NotesGuidance

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

Inclusion Terms

  • Accessory rib
  • Congenital absence of rib
  • Congenital fusion of ribs
  • Congenital malformation of ribs NOS

Type 1 Excludes

  • short rib syndrome Q77.2

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

  • - Extra - See Also: Accessory;

External Cause of Injuries IndexGuidance

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

    • Absence(of) (organ or part) (complete or partial)
      • rib (acquired)
        • congenital
    • Accessory(congenital)
      • rib
    • Agenesis
      • rib
    • Anomaly, anomalous(congenital) (unspecified type)
      • rib
    • Bifurcation(congenital)
      • rib
    • Deformity
      • rib (acquired)
        • congenital
    • Extra
      • rib
    • Fusion, fused(congenital)
      • ribs
    • High
      • thoracic rib
    • Hypoplasia, hypoplastic
      • rib
    • Malposition
      • congenital
        • rib (cage)
    • Supernumerary(congenital)
      • 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

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 Q76.6 to ICD-9-CMHistory

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

ICD-9-CM
756.3 Rib & sternum anomal NEC
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 Q76.6Overview

Is Q76.6 (Congenital malformations of spine and bony thorax) a billable code?

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

What MS-DRG does Q76.6 group to?

When other congenital malformations of ribs 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 Q76.6 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 other congenital malformations of ribs on inpatient claims.

What is the ICD-9 equivalent of Q76.6?

Under the General Equivalence Mappings, other congenital malformations of ribs converts to ICD-9-CM 756.3 (rib & sternum anomal NEC). 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.