ICD-10-CM 2027
ICD-10 code for Postthrombotic syndrome
From the official ICD-10-CM alphabetic index entry “Syndrome › postthrombotic”. Page updated September 29, 2026.
About coding Postthrombotic syndrome
The ICD-10-CM code for Postthrombotic syndrome is I87.009 (Postthrombotic syndrome without complications of unspecified extremity). The official index lists 6 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I87.009.
Within I87.00, choose I87.009 (of unspecified extremity) only when documentation doesn't support a more specific option: of right lower extremity (I87.001), of left lower extremity (I87.002) and of bilateral lower extremity (I87.003).
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.
More specific Postthrombotic syndrome codes (official index)
- with
- inflammation I87.02 — Postthrombotic syndrome with inflammation
- with ulcer I87.03 — Postthrombotic syndrome with ulcer and inflammation
- specified complication NEC I87.09 — Postthrombotic syndrome with other complications
- ulcer I87.01 — Postthrombotic syndrome with ulcer
- with inflammation I87.03 — Postthrombotic syndrome with ulcer and inflammation
- asymptomatic I87.00 — Postthrombotic syndrome without complications
Common questions about Postthrombotic syndrome ICD-10 codes
What is the ICD-10 code for Postthrombotic syndrome?
- I87.009 — Postthrombotic syndrome without complications of unspecified extremity. More specific codes apply when the documentation supports them: I87.02, I87.03, I87.09, I87.01 and others below.
What is the ICD-10 code for asymptomatic postthrombotic syndrome?
- I87.00 — Postthrombotic syndrome without complications (header code; choose a more specific subcode).
Is I87.009 billable?
- Yes. I87.009 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I87.009 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I87.009 as a principal diagnosis.
Is I87.009 a CC or MCC?
- No. I87.009 is neither a CC nor an MCC under MS-DRG v44.0.