2024 ICD-10-CM Diagnosis Code I99.9

Unspecified disorder of circulatory system

Short Description:
Unspecified disorder of circulatory system
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator [1]
Not chronic
Code Navigator:

Code Classification

  • Diseases of the circulatory system
    • Other and unspecified disorders of the circulatory system
      • Other and unspecified disorders of circulatory system

I99.9 is a billable diagnosis code used to specify a medical diagnosis of unspecified disorder of circulatory system. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Unspecified diagnosis codes like I99.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Acute disease of cardiovascular system
  • Cardiovascular abnormality due to anomalous origin of arterial duct
  • Cardiovascular abnormality due to anomalous origin of coronary artery from pulmonary artery
  • Cardiovascular abnormality due to anomalous origin of coronary artery orifice
  • Cardiovascular abnormality due to bilateral arterial ducts
  • Cardiovascular abnormality due to infective myocarditis
  • Cardiovascular abnormality due to patent arterial duct
  • Cardiovascular sequelae of disorders
  • Cardiovascular system complication of procedure
  • Cardiovascular system problem
  • Cauda equina syndrome due to vascular disorder
  • Chronic visceral pain
  • Chronic visceral pain due to vascular disorder
  • Corvisart's facies
  • Disease affecting entire cardiovascular system
  • Disease of circulatory system complicating pregnancy childbirth and puerperium
  • Disorder of blood vessels of thorax
  • Erythrocytosis due to cardiovascular disease
  • Erythrocytosis due to tissue hypoxemia
  • Fetal disorder due to chronic maternal cardiovascular disease
  • Glaucoma associated with vascular disorder
  • Hereditary angiopathy with nephropathy, aneurysms, and muscle cramps syndrome
  • Hypopituitarism due to vascular disorder
  • Impaired circulatory system function
  • Inflammatory disorder of the cardiovascular system
  • Neovascular glaucoma
  • Neovascularization of angle
  • Restrictive ophthalmopathy
  • Sequelae of cardiovascular disorders
  • Silent white matter disease due to vascular disease
  • Vascular disease of abdomen
  • Vascular disorder
  • Vascular disorder of pelvis
  • Vascular extraocular myopathy
  • Visceral pain
  • White matter disorder due to vascular abnormality

Clinical Classification

Clinical Category:
Other specified and unspecified circulatory disease
CCSR Category Code:
Inpatient Default CCSR:
Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.
Outpatient Default CCSR:
Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Clinical Information

  • Visceral Pain-. pain originating from internal organs (viscera) associated with autonomic phenomena (pallor; sweating; nausea; and vomiting). it often becomes a referred pain.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert I99.9 to ICD-9-CM Code

  • ICD-9-CM Code: 459.9 - Circulatory disease NOS
    Conversion Flag: Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.


[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.