I87.031 Postthrombotic syndrome with ulcer and inflammation of right lower extremity

✓ Billable ICD-10-CM 2026
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The ICD-10-CM code for Postthrombotic syndrome with ulcer and inflammation of right lower extremity is I87.031 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Section
I80-I89: Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89)
Category I87
57 codes (44 billable)
FY2026 Status
Stable since FY2024

U.S. Hospital Utilization

  • An estimated 55 U.S. inpatient stays in 2018 included I87.031 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Presumed relationship due to Index term “with”

The classification presumes a causal relationship between hypertension and heart involvement and between hypertension and kidney involvement, as the two conditions are linked by the term “with” in the Alphabetic Index. These conditions should be coded as related even in the absence of provider documentation explicitly linking them, unless the documentation clearly states the conditions are unrelated.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.9.a
Provider must link conditions not specifically indexed as related

For hypertension and conditions not specifically linked by relational terms such as “with,” “associated with” or “due to” in the classification, provider documentation must link the conditions in order to code them as related.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.9.a

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

Parent Code

I87 Other disorders of veins

Related Codes in I87

I87 Other disorders of veins I87.0 Postthrombotic syndrome I87.00 Postthrombotic syndrome without complications I87.001 Postthrombotic syndrome without complications of right lower extremity I87.002 Postthrombotic syndrome without complications of left lower extremity I87.003 Postthrombotic syndrome without complications of bilateral lower extremity I87.009 Postthrombotic syndrome without complications of unspecified extremity I87.01 Postthrombotic syndrome with ulcer I87.011 Postthrombotic syndrome with ulcer of right lower extremity I87.012 Postthrombotic syndrome with ulcer of left lower extremity I87.013 Postthrombotic syndrome with ulcer of bilateral lower extremity I87.019 Postthrombotic syndrome with ulcer of unspecified lower extremity I87.02 Postthrombotic syndrome with inflammation I87.021 Postthrombotic syndrome with inflammation of right lower extremity I87.022 Postthrombotic syndrome with inflammation of left lower extremity I87.023 Postthrombotic syndrome with inflammation of bilateral lower extremity I87.029 Postthrombotic syndrome with inflammation of unspecified lower extremity I87.03 Postthrombotic syndrome with ulcer and inflammation I87.032 Postthrombotic syndrome with ulcer and inflammation of left lower extremity I87.033 Postthrombotic syndrome with ulcer and inflammation of bilateral lower extremity
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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