ICD-10-CM Code For Congenital Malformations Of Musculoskeletal System, Not Elsewhere Classified: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group Q79 includes congenital malformations of the musculoskeletal system not classified elsewhere, such as various limb, skeletal, and muscular developmental anomalies present at birth. These ICD-10-CM diagnosis codes are used to document congenital structural abnormalities, capture the extent of anatomical involvement, and indicate associated functional impairment or clinical complexity. Accurate coding within the ICD-10-CM Q79 group supports proper claim adjudication and complete clinical documentation and appropriate reimbursement.

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ICD-10-CM Q79: Congenital Malformations Of Musculoskeletal System, Not Elsewhere Classified Overview

This group represents congenital malformations affecting bones, joints, muscles, and connective tissues that are not classified in other specific ICD-10-CM categories. It targets structural and developmental anomalies of the musculoskeletal system present at birth. Accurate coding is important to reflect clinical complexity and to support appropriate reimbursement and longitudinal care planning.

When to Use

Use a code from this group when documenting a congenital musculoskeletal structural anomaly that does not have a more specific ICD-10-CM category. Select codes to reflect the specific anatomical site, laterality, and any associated functional impairment when documented in the medical record.

ICD-10-CM Codes

14 rows

ICD-10-CM Code	Description
Q79.0	Congenital diaphragmatic hernia
Q79.1	Other congenital malformations of diaphragm
Q79.2	Exomphalos
Q79.3	Gastroschisis
Q79.4	Prune belly syndrome
Q79.51	Congenital hernia of bladder
Q79.59	Other congenital malformations of abdominal wall
Q79.60	Ehlers-Danlos syndrome, unspecified
Q79.61	Classical Ehlers-Danlos syndrome
Q79.62	Hypermobile Ehlers-Danlos syndrome
Q79.63	Vascular Ehlers-Danlos syndrome
Q79.69	Other Ehlers-Danlos syndromes
Q79.8	Other congenital malformations of musculoskeletal system
Q79.9	Congenital malformation of musculoskeletal system, unspecified

DRG Codes

10 rows

DRG Code	Description
205	Other Respiratory System Diagnoses with MCC
206	Other Respiratory System Diagnoses without MCC
393	Other Digestive System Diagnoses with MCC
394	Other Digestive System Diagnoses with CC
395	Other Digestive System Diagnoses without CC/MCC
564	Other Musculoskeletal System and Connective Tissue Diagnoses with MCC
565	Other Musculoskeletal System and Connective Tissue Diagnoses with CC
566	Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC
791	Prematurity with Major Problems
793	Full Term Neonate with Major Problems

Typical Clinical Scenarios

A newborn infant is noted at birth to have a shortened, hypoplastic right upper limb with absent forearm bones on newborn exam and radiographs confirming limb reduction defect. The infant is evaluated by neonatology and orthopedics for limb-length discrepancy and prosthetic/rehabilitation planning; a congenital malformation diagnosis from this group is assigned to document the congenital absence or reduction of limb structures. Typical codes: Q79.1, Q79.2
An adult with long-standing right clubfoot and rigid foot deformity presents to orthopedics for progressive pain and difficulty with ambulation; prior childhood treatment included casting but residual cavovarus and limited ankle motion persist. Imaging and physical exam confirm congenital talipes equinovarus as the underlying structural deformity contributing to current disability, so a congenital musculoskeletal malformation code is used as a primary diagnosis alongside any secondary osteoarthritic changes. Typical codes: Q79.51, Q79.59
A pediatric patient with known congenital scoliosis from vertebral segmentation anomalies is admitted after worsening respiratory compromise and progressive spinal curvature; multidisciplinary care is required to manage pulmonary restriction and plan surgical fusion. The congenital origin of the spinal deformity is coded to explain the structural cause of the respiratory and orthopedic complications. Typical codes: Q79.3, Q79.8

Related Codes

Q65-CONGENITAL-DEFORMITIES-OF-HIP

ICD-10-CM Code For Congenital Deformities Of Hip: Group Overview

Q66-CONGENITAL-DEFORMITIES-OF-FEET

ICD-10-CM Code For Congenital Deformities Of Feet: Group Overview

Q67-CONGENITAL-MUSCULOSKELETAL-DEFORMITIES-HEAD-FACE-SPINE-CHEST

ICD-10-CM Code For Congenital Musculoskeletal Deformities Of Head Face Spine And Chest: Group Overview

Q68-OTHER-CONGENITAL-MUSCULOSKELETAL-DEFORMITIES

ICD-10-CM Code For Other Congenital Musculoskeletal Deformities: Group Overview

Q69-POLYDACTYLY

ICD-10-CM Code For Polydactyly: Group Overview

Q70-SYNDACTYLY-CONGENITAL-DIGIT-FUSION

ICD-10-CM Code For Syndactyly: Group Overview

Q71-REDUCTION-DEFECTS-OF-UPPER-LIMB

ICD-10-CM Code For Reduction Defects Of Upper Limb: Group Overview

Q72-REDUCTION-DEFECTS-OF-LOWER-LIMB

ICD-10-CM Code For Reduction Defects Of Lower Limb: Group Overview

Q73-REDUCTION-DEFECTS-OF-UNSPECIFIED-LIMB

ICD-10-CM Code For Reduction Defects Of Unspecified Limb: Group Overview

Q74-OTHER-CONGENITAL-MALFORMATIONS-OF-LIMBS

ICD-10-CM Code For Other Congenital Malformations Of Limb(S): Group Overview

Showing 1–10 of 14

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-CM Codes

14 rows

ICD-10-CM Code	Description
Q79.0	Congenital diaphragmatic hernia
Q79.1	Other congenital malformations of diaphragm
Q79.2	Exomphalos
Q79.3	Gastroschisis
Q79.4	Prune belly syndrome
Q79.51	Congenital hernia of bladder
Q79.59	Other congenital malformations of abdominal wall
Q79.60	Ehlers-Danlos syndrome, unspecified
Q79.61	Classical Ehlers-Danlos syndrome
Q79.62	Hypermobile Ehlers-Danlos syndrome
Q79.63	Vascular Ehlers-Danlos syndrome
Q79.69	Other Ehlers-Danlos syndromes
Q79.8	Other congenital malformations of musculoskeletal system
Q79.9	Congenital malformation of musculoskeletal system, unspecified

DRG Codes

10 rows

DRG Code	Description
205	Other Respiratory System Diagnoses with MCC
206	Other Respiratory System Diagnoses without MCC
393	Other Digestive System Diagnoses with MCC
394	Other Digestive System Diagnoses with CC
395	Other Digestive System Diagnoses without CC/MCC
564	Other Musculoskeletal System and Connective Tissue Diagnoses with MCC
565	Other Musculoskeletal System and Connective Tissue Diagnoses with CC
566	Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC
791	Prematurity with Major Problems
793	Full Term Neonate with Major Problems

Typical Clinical Scenarios

A newborn infant is noted at birth to have a shortened, hypoplastic right upper limb with absent forearm bones on newborn exam and radiographs confirming limb reduction defect. The infant is evaluated by neonatology and orthopedics for limb-length discrepancy and prosthetic/rehabilitation planning; a congenital malformation diagnosis from this group is assigned to document the congenital absence or reduction of limb structures. Typical codes: Q79.1, Q79.2
An adult with long-standing right clubfoot and rigid foot deformity presents to orthopedics for progressive pain and difficulty with ambulation; prior childhood treatment included casting but residual cavovarus and limited ankle motion persist. Imaging and physical exam confirm congenital talipes equinovarus as the underlying structural deformity contributing to current disability, so a congenital musculoskeletal malformation code is used as a primary diagnosis alongside any secondary osteoarthritic changes. Typical codes: Q79.51, Q79.59
A pediatric patient with known congenital scoliosis from vertebral segmentation anomalies is admitted after worsening respiratory compromise and progressive spinal curvature; multidisciplinary care is required to manage pulmonary restriction and plan surgical fusion. The congenital origin of the spinal deformity is coded to explain the structural cause of the respiratory and orthopedic complications. Typical codes: Q79.3, Q79.8

Related Codes

Q65-CONGENITAL-DEFORMITIES-OF-HIP

ICD-10-CM Code For Congenital Deformities Of Hip: Group Overview

Q66-CONGENITAL-DEFORMITIES-OF-FEET

ICD-10-CM Code For Congenital Deformities Of Feet: Group Overview

Q67-CONGENITAL-MUSCULOSKELETAL-DEFORMITIES-HEAD-FACE-SPINE-CHEST

ICD-10-CM Code For Congenital Musculoskeletal Deformities Of Head Face Spine And Chest: Group Overview

Q68-OTHER-CONGENITAL-MUSCULOSKELETAL-DEFORMITIES

ICD-10-CM Code For Other Congenital Musculoskeletal Deformities: Group Overview

Q69-POLYDACTYLY

ICD-10-CM Code For Polydactyly: Group Overview

Q70-SYNDACTYLY-CONGENITAL-DIGIT-FUSION

ICD-10-CM Code For Syndactyly: Group Overview

Q71-REDUCTION-DEFECTS-OF-UPPER-LIMB

ICD-10-CM Code For Reduction Defects Of Upper Limb: Group Overview

Q72-REDUCTION-DEFECTS-OF-LOWER-LIMB

ICD-10-CM Code For Reduction Defects Of Lower Limb: Group Overview

Q73-REDUCTION-DEFECTS-OF-UNSPECIFIED-LIMB

ICD-10-CM Code For Reduction Defects Of Unspecified Limb: Group Overview

Q74-OTHER-CONGENITAL-MALFORMATIONS-OF-LIMBS

ICD-10-CM Code For Other Congenital Malformations Of Limb(S): Group Overview

Showing 1–10 of 14

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-CM Code For Congenital Malformations Of Musculoskeletal System, Not Elsewhere Classified: Group Overview

Sign up for ICD-10-CM Code For Congenital Malformations Of Musculoskeletal System, Not Elsewhere Classified: Group Overview policy alerts

ICD-10-CM Q79: Congenital Malformations Of Musculoskeletal System, Not Elsewhere Classified Overview

ICD-10-CM Code For Congenital Malformations Of Musculoskeletal System, Not Elsewhere Classified: Group Overview

Sign up for ICD-10-CM Code For Congenital Malformations Of Musculoskeletal System, Not Elsewhere Classified: Group Overview policy alerts

ICD-10-CM Q79: Congenital Malformations Of Musculoskeletal System, Not Elsewhere Classified Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in ICD-10-CM code group `Q79`?

How does accurate coding within `Q79` affect reimbursement?

What are examples of specific codes for abdominal wall malformations in `Q79`?

Which `Q79` codes relate to Ehlers-Danlos syndromes?

What related DRGs might be affected by diagnoses in `Q79`?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which conditions are included in ICD-10-CM code group `Q79`?

How does accurate coding within `Q79` affect reimbursement?

What are examples of specific codes for abdominal wall malformations in `Q79`?

Which `Q79` codes relate to Ehlers-Danlos syndromes?

What related DRGs might be affected by diagnoses in `Q79`?

References