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ICD-10/I80.249

I80.249 ICD-10-CM Code: Phlebitis and thrombophlebitis of unspecified peroneal vein

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.

  • MS-DRG 299 — PERIPHERAL VASCULAR DISORDERS WITH MCC (MDC 05)
  • MS-DRG 300 — PERIPHERAL VASCULAR DISORDERS WITH CC (MDC 05)
  • MS-DRG 301 — PERIPHERAL VASCULAR DISORDERS WITHOUT CC/MCC (MDC 05)
  • MS-DRG 791 — PREMATURITY WITH MAJOR PROBLEMS (MDC 15)
  • MS-DRG 793 — FULL TERM NEONATE WITH MAJOR PROBLEMS (MDC 15)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Risk Adjustment (CMS-HCC)

Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.

  • HCC 267 — Deep Vein Thrombosis and Pulmonary Embolism

Other models: CMS-HCC V22 HCC 108 · RxHCC V08 HCC 215

Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.

Official Registry Overview & Definition

Phlebitis and thrombophlebitis of unspecified peroneal vein is a billable ICD-10-CM diagnosis code (I80.249).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for I80.249 in the official ICD-10-CM tabular list.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • endophlebitis
  • inflammation, vein
  • periphlebitis
  • suppurative phlebitis

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Code First

Underlying conditions that must be sequenced before this code.

  • Code first, if applicable: phlebitis and thrombophlebitis complicating abortion, ectopic or molar pregnancy (O00-O07, O08.7)
  • phlebitis and thrombophlebitis complicating pregnancy, childbirth and the puerperium (O22.-, O87.-)

Change history

  • FY2020 — 2019-10-01
    Added to the code set
    Phlebitis and thrombophlebitis of unspecified peroneal vein
    FY2020 changes

Verify Before Coding

  • Billable — reportable as written.
  • CC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Contextual Map

Every relationship of I80.249 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • I80.24 — Phlebitis and thrombophlebitis of peroneal vein [Hierarchy]

Clinical classification (CCSR)

  • CIR033 — Acute phlebitis; thrombophlebitis and thromboembolism [CCSR]

Risk adjustment (CMS-HCC)

  • HCC 267 — Deep Vein Thrombosis and Pulmonary Embolism [CMS-HCC]

Potential MS-DRG

  • CC — Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (CC).”
  • DRG 299 — PERIPHERAL VASCULAR DISORDERS WITH MCC [MS-DRG]: “PERIPHERAL VASCULAR DISORDERS WITH MCC (MDC 05)”
  • DRG 300 — PERIPHERAL VASCULAR DISORDERS WITH CC [MS-DRG]: “PERIPHERAL VASCULAR DISORDERS WITH CC (MDC 05)”
  • DRG 301 — PERIPHERAL VASCULAR DISORDERS WITHOUT CC/MCC [MS-DRG]: “PERIPHERAL VASCULAR DISORDERS WITHOUT CC/MCC (MDC 05)”
  • DRG 791 — PREMATURITY WITH MAJOR PROBLEMS [MS-DRG]: “PREMATURITY WITH MAJOR PROBLEMS (MDC 15)”
  • DRG 793 — FULL TERM NEONATE WITH MAJOR PROBLEMS [MS-DRG]: “FULL TERM NEONATE WITH MAJOR PROBLEMS (MDC 15)”

Nearest codes (40)

  • I80 — Phlebitis and thrombophlebitis [Sibling]
  • I80.12 — Phlebitis and thrombophlebitis of left femoral vein [Sibling]
  • I80.13 — Phlebitis and thrombophlebitis of femoral vein, bilateral [Sibling]
  • I80.2 — Phlebitis and thrombophlebitis of other and unspecified deep vessels of lower extremities [Sibling]
  • I80.20 — Phlebitis and thrombophlebitis of unspecified deep vessels of lower extremities [Sibling]
  • I80.201 — Phlebitis and thrombophlebitis of unspecified deep vessels of right lower extremity [Sibling]
  • I80.202 — Phlebitis and thrombophlebitis of unspecified deep vessels of left lower extremity [Sibling]
  • I80.203 — Phlebitis and thrombophlebitis of unspecified deep vessels of lower extremities, bilateral [Sibling]
  • and 32 more

Change history

  • FY2020 — Added to the code set [Change history]

Relationships & Classification

Clinical classification (AHRQ CCSR):CIR033 — Acute phlebitis; thrombophlebitis and thromboembolism (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Potential MS-DRG Relationships (FY2026)

CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 100 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 5 MS-DRGs: DRG 299 (MDC 05), DRG 300 (MDC 05), DRG 301 (MDC 05), DRG 791 (MDC 15), DRG 793 (MDC 15).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to I80.249 in its code family, with their registry titles.

  • I80.239 — Phlebitis and thrombophlebitis of unspecified tibial vein
  • I80.24 — Phlebitis and thrombophlebitis of peroneal vein
  • I80.241 — Phlebitis and thrombophlebitis of right peroneal vein
  • I80.242 — Phlebitis and thrombophlebitis of left peroneal vein
  • I80.243 — Phlebitis and thrombophlebitis of peroneal vein, bilateral
  • I80.25 — Phlebitis and thrombophlebitis of calf muscular vein
  • I80.251 — Phlebitis and thrombophlebitis of right calf muscular vein
  • I80.252 — Phlebitis and thrombophlebitis of left calf muscular vein
  • I80.253 — Phlebitis and thrombophlebitis of calf muscular vein, bilateral
  • I80.259 — Phlebitis and thrombophlebitis of unspecified calf muscular vein

View all codes in the I80 family