2021 ICD-10-CM Code I99.9
Unspecified disorder of circulatory system
Valid for Submission
I99.9 is a billable diagnosis code used to specify a medical diagnosis of unspecified disorder of circulatory system. The code I99.9 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.
The ICD-10-CM code I99.9 might also be used to specify conditions or terms like 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, etc.
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.
| ICD-10: | I99.9 |
| Short Description: | Unspecified disorder of circulatory system |
| Long Description: | Unspecified disorder of circulatory system |
Code Classification
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code I99.9 are found in the index:
- - Angiopathia, angiopathy - I99.9
- - Change (s) (in) (of) - See Also: Removal;
- - circulatory - I99.9
- - vascular - I99.9
- - Circulation
- - defective (lower extremity) - I99.9
- - Complication (s) (from) (of)
- - vascular - I99.9
- - Defect, defective - Q89.9
- - circulation - I99.9
- - vascular (local) - I99.9
- - Deficiency, deficient
- - vascular - I99.9
- - Disease, diseased - See Also: Syndrome;
- - Disturbance (s) - See Also: Disease;
- - circulatory - I99.9
- - vascular - I99.9
- - Lesion (s) (nontraumatic)
- - vascular - I99.9
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
- 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
- Glaucoma associated with vascular disorder
- Hereditary angiopathy with nephropathy, aneurysms, and muscle cramps syndrome
- Impaired circulatory system function
- Inflammatory disorder of the cardiovascular system
- Neovascular glaucoma
- Neovascularization of angle
- Sequelae of cardiovascular disorders
- Sequelae of disorders by system of sequelae
- Vascular disease of abdomen
- Vascular disorder
- Vascular disorder of pelvis
- White matter disorder due to vascular abnormality
Diagnostic Related Groups - MS-DRG Mapping
The ICD-10 code I99.9 is grouped in the following groups for version MS-DRG V38.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). applicable from 10/01/2020 through 09/30/2021.
Convert I99.9 to ICD-9 Code
The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code I99.9 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.
- 459.9 - Circulatory disease NOS (Approximate Flag)
Code History
- 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 (First year ICD-10-CM implemented into the HIPAA code set)