2021 ICD-10-CM Diagnosis Code Q28.1

Other malformations of precerebral vessels

    2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
  • Q28.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM Q28.1 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of Q28.1 - other international versions of ICD-10 Q28.1 may differ.
Applicable To
  • Congenital malformation of precerebral vessels NOS
  • Congenital precerebral aneurysm (nonruptured)
The following code(s) above Q28.1 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to Q28.1:
  • Q00-Q99
    2021 ICD-10-CM Range Q00-Q99

    Congenital malformations, deformations and chromosomal abnormalities

    Note
    • Codes from this chapter are not for use on maternal records
    Type 2 Excludes
    • inborn errors of metabolism (E70-E88)
    Congenital malformations, deformations and chromosomal abnormalities
  • Q28
    ICD-10-CM Diagnosis Code Q28

    Other congenital malformations of circulatory system

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • congenital aneurysm NOS (Q27.8)
    • congenital coronary aneurysm (Q24.5)
    • ruptured cerebral arteriovenous malformation (I60.8)
    • ruptured malformation of precerebral vessels (I72.0)
    Type 2 Excludes
    • congenital peripheral aneurysm (Q27.8)
    • congenital pulmonary aneurysm (Q25.79)
    • congenital retinal aneurysm (Q14.1)
    Other congenital malformations of circulatory system
Approximate Synonyms
  • Congenital malformation of precerebral vessel
Present On Admission
POA Help
"Present On Admission" is defined as present at the time the order for inpatient admission occurs — conditions that develop during an outpatient encounter, including emergency department, observation, or outpatient surgery, are considered POA.
  • Q28.1 is considered exempt from POA reporting.
ICD-10-CM Q28.1 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 299 Peripheral vascular disorders with mcc
  • 300 Peripheral vascular disorders with cc
  • 301 Peripheral vascular disorders without cc/mcc

Convert Q28.1 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
Code annotations containing back-references to Q28.1:
  • Type 2 Excludes: I72
    , I72
    ICD-10-CM Diagnosis Code I72

    Other aneurysm

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Includes
    • aneurysm (cirsoid) (false) (ruptured)
    Type 2 Excludes
    • acquired aneurysm (I77.0)
    • aneurysm (of) aorta (I71.-)
    • aneurysm (of) arteriovenous NOS (Q27.3-)
    • carotid artery dissection (I77.71)
    • cerebral (nonruptured) aneurysm (I67.1)
    • coronary aneurysm (I25.4)
    • coronary artery dissection (I25.42)
    • dissection of artery NEC (I77.79)
    • dissection of precerebral artery, congenital (nonruptured) (Q28.1)
    • heart aneurysm (I25.3)
    • iliac artery dissection (I77.72)
    • precerebral artery, congential (nonruptured) (Q28.1)
    • pulmonary artery aneurysm (I28.1)
    • renal artery dissection (I77.73)
    • retinal aneurysm (H35.0)
    • ruptured cerebral aneurysm (I60.7)
    • varicose aneurysm (I77.0)
    • vertebral artery dissection (I77.74)
    ICD-10-CM Diagnosis Code I72

    Other aneurysm

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Includes
    • aneurysm (cirsoid) (false) (ruptured)
    Type 2 Excludes
    • acquired aneurysm (I77.0)
    • aneurysm (of) aorta (I71.-)
    • aneurysm (of) arteriovenous NOS (Q27.3-)
    • carotid artery dissection (I77.71)
    • cerebral (nonruptured) aneurysm (I67.1)
    • coronary aneurysm (I25.4)
    • coronary artery dissection (I25.42)
    • dissection of artery NEC (I77.79)
    • dissection of precerebral artery, congenital (nonruptured) (Q28.1)
    • heart aneurysm (I25.3)
    • iliac artery dissection (I77.72)
    • precerebral artery, congential (nonruptured) (Q28.1)
    • pulmonary artery aneurysm (I28.1)
    • renal artery dissection (I77.73)
    • retinal aneurysm (H35.0)
    • ruptured cerebral aneurysm (I60.7)
    • varicose aneurysm (I77.0)
    • vertebral artery dissection (I77.74)

Diagnosis Index entries containing back-references to Q28.1:
  • Aberrant (congenital) - see also Malposition, congenital
    • artery (peripheral) Q27.8
      ICD-10-CM Diagnosis Code Q27.8

      Other specified congenital malformations of peripheral vascular system

        2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
      Applicable To
      • Absence of peripheral vascular system
      • Atresia of peripheral vascular system
      • Congenital aneurysm (peripheral)
      • Congenital stricture, artery
      • Congenital varix
      Type 1 Excludes
      • arteriovenous malformation (Q27.3-)
      • basilar NEC Q28.1
      • precerebral Q28.1
      • vertebral Q28.1
    • vein (peripheral) Q27.8
      ICD-10-CM Diagnosis Code Q27.8

      Other specified congenital malformations of peripheral vascular system

        2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
      Applicable To
      • Absence of peripheral vascular system
      • Atresia of peripheral vascular system
      • Congenital aneurysm (peripheral)
      • Congenital stricture, artery
      • Congenital varix
      Type 1 Excludes
      • arteriovenous malformation (Q27.3-)
      • precerebral Q28.1
  • Absence (of) (organ or part) (complete or partial)
    • vein (peripheral) Q27.8
      ICD-10-CM Diagnosis Code Q27.8

      Other specified congenital malformations of peripheral vascular system

        2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
      Applicable To
      • Absence of peripheral vascular system
      • Atresia of peripheral vascular system
      • Congenital aneurysm (peripheral)
      • Congenital stricture, artery
      • Congenital varix
      Type 1 Excludes
      • arteriovenous malformation (Q27.3-)
      • precerebral Q28.1
  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) I72.9
    ICD-10-CM Diagnosis Code I72.9

    Aneurysm of unspecified site

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • Anomaly, anomalous (congenital) (unspecified type) Q89.9
    ICD-10-CM Diagnosis Code Q89.9

    Congenital malformation, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Applicable To
    • Congenital anomaly NOS
    • Congenital deformity NOS
    • artery (peripheral) Q27.9
      ICD-10-CM Diagnosis Code Q27.9

      Congenital malformation of peripheral vascular system, unspecified

        2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
      Applicable To
      • Anomaly of artery or vein NOS
      • basilar NEC Q28.1
      • vertebral NEC Q28.1
    • vessel(s) Q27.9
      ICD-10-CM Diagnosis Code Q27.9

      Congenital malformation of peripheral vascular system, unspecified

        2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
      Applicable To
      • Anomaly of artery or vein NOS
      • precerebral Q28.1
    • precerebral vessel Q28.1
  • Dissection
  • Distribution vessel, atypical Q27.9
    ICD-10-CM Diagnosis Code Q27.9

    Congenital malformation of peripheral vascular system, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
    Applicable To
    • Anomaly of artery or vein NOS
    • precerebral Q28.1
  • Malformation (congenital) - see also Anomaly
    • precerebral vessels Q28.1

ICD-10-CM Codes Adjacent To Q28.1
Q27.31 Arteriovenous malformation of vessel of upper limb
Q27.32 Arteriovenous malformation of vessel of lower limb
Q27.33 Arteriovenous malformation of digestive system vessel
Q27.34 Arteriovenous malformation of renal vessel
Q27.39 Arteriovenous malformation, other site
Q27.4 Congenital phlebectasia
Q27.8 Other specified congenital malformations of peripheral vascular system
Q27.9 Congenital malformation of peripheral vascular system, unspecified
Q28 Other congenital malformations of circulatory system
Q28.0 Arteriovenous malformation of precerebral vessels
Q28.1 Other malformations of precerebral vessels
Q28.2 Arteriovenous malformation of cerebral vessels
Q28.3 Other malformations of cerebral vessels
Q28.8 Other specified congenital malformations of circulatory system
Q28.9 Congenital malformation of circulatory system, unspecified
Q30 Congenital malformations of nose
Q30.0 Choanal atresia
Q30.1 Agenesis and underdevelopment of nose
Q30.2 Fissured, notched and cleft nose
Q30.3 Congenital perforated nasal septum
Q30.8 Other congenital malformations of nose

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.