ICD-10-CM 2027 diagnosis code
Q27.9Congenital malformation of peripheral vascular system, unspecified
Q27.9 is a valid, billable ICD-10-CM code for congenital malformation of peripheral vascular system, unspecified. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Congenital malformation of peripheral vascular system, unsp
Looking up by condition? See ICD-10 code for Vein anomaly, ICD-10 code for Vein agenesis, ICD-10 code for Vascular anomaly, ICD-10 code for Vessel s anomaly.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About Q27.9
Q27.9 is the ICD-10-CM diagnosis code for congenital malformation of peripheral vascular system, unspecified. It belongs to category Q27 (other congenital malformations of peripheral vascular system), block Q20-Q28 (congenital malformations of the circulatory system) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within Q27, choose Q27.9 (Congenital malformation of peripheral vascular system, unspecified) only when documentation doesn't support a more specific option: congenital absence and hypoplasia of umbilical artery (Q27.0), congenital renal artery stenosis (Q27.1), other congenital malformations of renal artery (Q27.2), arteriovenous malformation (peripheral) (Q27.3), congenital phlebectasia (Q27.4) and other specified congenital malformations of peripheral vascular system (Q27.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 299 (Peripheral Vascular Disorders with MCC, relative weight 1.5842), DRG 300 (Peripheral Vascular Disorders with CC, relative weight 1.0464) and DRG 301 (Peripheral Vascular Disorders without CC/MCC, relative weight 0.7133), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 747.60 (anomaly of the peripheral vascular system, unspecified site).
Coding notes
- Anomaly of artery or vein NOS
Notes that apply from higher levels
Instructions written at a parent level also apply to Q27.9.
Broader instructions also apply from Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.
Alphabetic index entries
16 entriesTerms in the official ICD-10-CM index that lead to Q27.9.
- Accessory (congenital) › blood vessels NEC
- Agenesis › artery (peripheral)
- Agenesis › vein (s) (peripheral)
- Anomaly, anomalous (congenital) (unspecified type) › artery (peripheral)
- Anomaly, anomalous (congenital) (unspecified type) › artery (peripheral) › peripheral
- Anomaly, anomalous (congenital) (unspecified type) › capillary
- Anomaly, anomalous (congenital) (unspecified type) › peripheral vascular system
- Anomaly, anomalous (congenital) (unspecified type) › vascular
- Anomaly, anomalous (congenital) (unspecified type) › vein (s) (peripheral)
- Anomaly, anomalous (congenital) (unspecified type) › vessel (s)
- Defect, defective › vascular (local) › congenital
- Deformity › artery (congenital) (peripheral) NOS
- Deformity › vein (congenital)
- Distribution vessel, atypical
- Malformation (congenital) › peripheral vascular system
- Malformation (congenital) › vascular system, peripheral
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 05 · Diseases and Disorders of the Circulatory System
ICD-9-CM equivalent
Converter →- 747.60Anomaly of the peripheral vascular system, unspecified siteapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about Q27.9
Is Q27.9 billable?
- Yes. Q27.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q27.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q27.9 as a principal diagnosis.
Is Q27.9 a CC or MCC?
- No. Q27.9 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does Q27.9 group to?
- Q27.9 is used in the MS-DRG v44.0 logic for MS-DRG 299 (Peripheral Vascular Disorders with MCC), MS-DRG 300 (Peripheral Vascular Disorders with CC) and MS-DRG 301 (Peripheral Vascular Disorders without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for Q27.9?
- The CMS General Equivalence Mappings map Q27.9 to ICD-9-CM 747.60.