2027 ICD-10-CM Diagnosis Code I82.90Acute embolism and thrombosis of unspecified vein
ICD-10-CM Codes›I00–I99›I80-I89›I82
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
I82.90 is a billable ICD-10-CM diagnosis code for acute embolism and thrombosis of unspecified vein. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 299 through 301. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 201 closely related codes. The code is flagged as an unspecified code, since codes identifying laterality exist in the same family. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acute phlebitis; thrombophlebitis and thromboembolism.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for I82.90.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute deep venous thrombosis
- Arteriovenous graft thrombosis
- Arteriovenous shunt thrombosis
- Complication of hemodialysis
- Definite thrombus
- Dermatosis resulting from intravascular thrombosis
- Disorder of arteriovenous shunt
- Drug-induced immune thrombocytopenia
- Graft failure due to thrombosis
- Heparin-induced thrombocytopenia
- Heparin-induced thrombocytopenia with thrombosis
- Injection site thrombosis
- Secondary autoimmune thrombocytopenia
- Secondary thrombocytopenia
- Severe thrombus
- Small vessel thrombosis of skin
- Superficial vein thrombosis
- Thrombocytopenia caused by drugs
- Thromboembolism after infusion
- Thromboembolism of vein
- Thromboembolism of vein due to prolonged immobilization
- Thromboembolus of vein following surgical procedure
- Thrombosis
- Thrombosis of arteriovenous graft caused by hemodialysis arteriovenous access device
- Thrombosis of blood vessel
- Thrombosis of vein of trunk
- Vascular graft thrombosis
- Venous embolism
- Venous insufficiency of flap
- Venous occlusion
- Venous thrombosis
- Venous thrombosis following assisted fertilization
- Venous thrombosis of flap
- Visceral venous thrombosis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to I82.90: its own notes plus those printed at I82 and Chapter 9. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Embolism of vein NOS
- Thrombosis (vein) NOS
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
Code First
The underlying condition named in the note is sequenced before this code.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
vein NOS I82.90
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Thrombosis
formation and development of a thrombus or blood clot in blood vessels.
Patient EducationClinical
Blood Clots
A blood clot is a mass of blood that forms when platelets, proteins, and cells in the blood stick together. When you get hurt, your body forms a blood clot to stop the bleeding. After the bleeding stops and healing takes place, your body usually breaks down and removes the blood clot.
The full article covers:
- What is a blood clot?
- Who is more likely to develop blood clots?
- What are the symptoms of blood clots?
- How are blood clots diagnosed?
- What are the treatments for blood clots?
- Can blood clots be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert I82.90 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I82.90Overview
What is the ICD-10 code for acute embolism and thrombosis of unspecified vein?
The ICD-10-CM code for acute embolism and thrombosis of unspecified vein is I82.90 (sometimes written as I8290). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is I82.90 (Embolism and thrombosis of unspecified vein) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report acute embolism and thrombosis of unspecified vein on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does I82.90 group to?
When acute embolism and thrombosis of unspecified vein is the principal diagnosis on an inpatient stay, it groups to MS-DRG 301, 300, 299, with relative weights from 0.7132 to 1.5840 depending on complications. Higher weights mean higher Medicare reimbursement.
Is I82.90 a CC or MCC?
CMS lists I82.90 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 201 closely related codes in its exclusion list.
What is coded first with I82.90?
The Code First note at I82, which applies to I82.90, reads: venous embolism and thrombosis complicating: abortion, ectopic or molar pregnancy (O00-O07, O08.7); pregnancy, childbirth and the puerperium (O22.-, O87.-). When one of these applies, it is sequenced before I82.90.
