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ICD-10 Code Q27.9: Congenital malformation of peripheral vascular system, unspecified

Q27.9 is a billable ICD-10 diagnosis code used to classify Congenital malformation of peripheral vascular system, unspecified in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0).

When is it used?

  • May be used when a clinician documents congenital malformation of peripheral vascular system, unspecified in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
17Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0)
block
Q20-Q28Congenital malformations of the circulatory system
category
Q27Other congenital malformations of peripheral vascular system
currentQ27

Official coding notes

Inclusion terms
  • Anomaly of artery or vein NOS

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Cardiologist

Coverage-related procedures and services

CPT 76376high
3D RENDERING WITH INTERPRETATION AND REPORTING OF COMPUTED TOMOGRAPHY, MAGNETIC RESONANCE IMAGING, ULTRASOUND, OR OTHER TOMOGRAPHIC MODALITY WITH IMAGE POSTPROCESSING UNDER CONCURRENT SUPERVISION; NOT REQUIRING IMAGE POSTPROCESSING ON AN INDEPENDENT WORKSTATION
Source: CMS coverage guidance
CPT 76377high
3D RENDERING WITH INTERPRETATION AND REPORTING OF COMPUTED TOMOGRAPHY, MAGNETIC RESONANCE IMAGING, ULTRASOUND, OR OTHER TOMOGRAPHIC MODALITY WITH IMAGE POSTPROCESSING UNDER CONCURRENT SUPERVISION; REQUIRING IMAGE POSTPROCESSING ON AN INDEPENDENT WORKSTATION
Source: CMS coverage guidance
CPT 95940high
CONTINUOUS INTRAOPERATIVE NEUROPHYSIOLOGY MONITORING IN THE OPERATING ROOM, ONE ON ONE MONITORING REQUIRING PERSONAL ATTENDANCE, EACH 15 MINUTES (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
HCPCS G0453high
CONTINUOUS INTRAOPERATIVE NEUROPHYSIOLOGY MONITORING, FROM OUTSIDE THE OPERATING ROOM (REMOTE OR NEARBY), PER PATIENT, (ATTENTION DIRECTED EXCLUSIVELY TO ONE PATIENT) EACH 15 MINUTES (LIST IN ADDITION TO PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 93325high
DOPPLER ECHOCARDIOGRAPHY COLOR FLOW VELOCITY MAPPING (LIST SEPARATELY IN ADDITION TO CODES FOR ECHOCARDIOGRAPHY)
Source: CMS coverage guidance
CPT 93320high
DOPPLER ECHOCARDIOGRAPHY, PULSED WAVE AND/OR CONTINUOUS WAVE WITH SPECTRAL DISPLAY (LIST SEPARATELY IN ADDITION TO CODES FOR ECHOCARDIOGRAPHIC IMAGING); COMPLETE
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
Q27.9

Common synonyms

Congenital malformation of peripheral vascular system, unspecifiedCongenital malformation of peripheral vascular system

Frequently asked questions

Code details

CodeQ27.9
SystemICD10
Display nameCongenital malformation of peripheral vascular system, unspecified
ChapterCongenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA0)
BlockCongenital malformations of the circulatory system

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Accessory(congenital)AgenesisAgenesisAnomaly, anomalous(congenital) (unspecified type)Anomaly, anomalous(congenital) (unspecified type)Anomaly, anomalous(congenital) (unspecified type)Anomaly, anomalous(congenital) (unspecified type)Anomaly, anomalous(congenital) (unspecified type)Anomaly, anomalous(congenital) (unspecified type)Anomaly, anomalous(congenital) (unspecified type)Defect, defectiveDeformity

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code Q27.9 for Congenital malformation of peripheral vascular system, unspecified | HealthAssure