2026 ICD-10-CM Diagnosis Code T81.72XAComplication of vein following a procedure, not elsewhere classified, initial encounter

ICD-10-CM Codes›S00–T88›T80-T88›T81

ICD-10-CM T81.72XA
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T81.72XA is a billable ICD-10-CM diagnosis code for complication of vein following a procedure, not elsewhere classified, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 299 through 301. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication of other surgical or medical care, injury, initial encounter.

Code Identity

ICD-10-CM Code
T81.72XA
Billable Status
Yes — Valid for Submission
Code Describes
Complication of vein following a procedure, not elsewhere classified, initial encounter
Short Description
Complication of vein following a procedure, NEC, init
Parent Code
T81.72
Complication of vein following a procedure, not elsewhere classified

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT80-T88Complications of surgical and medical care, not elsewhere classified
CategoryT81Complications of procedures, not elsewhere classified
This CodeT81.72XAComplication of vein following a procedure, not elsewhere classified, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired abnormality of pulmonary venous structure
  • Acquired stenosis of pulmonary venous structure
  • Acute deep vein thrombosis of bilateral lower limbs following procedure
  • Acute deep vein thrombosis of bilateral upper limbs following procedure
  • Acute deep vein thrombosis of left lower limb following procedure
  • Acute deep vein thrombosis of left upper limb following procedure
  • Acute deep vein thrombosis of right lower limb following procedure
  • Acute deep vein thrombosis of right upper limb following procedure
  • Acute deep venous thrombosis of bilateral legs
  • Acute deep venous thrombosis of bilateral upper extremities
  • Acute deep venous thrombosis of left upper extremity
  • Acute deep venous thrombosis of lower extremity as complication of procedure
  • Acute deep venous thrombosis of right upper extremity
  • Acute deep venous thrombosis of upper extremity as complication of procedure
  • Bilateral chronic deep vein thrombosis of upper limbs following procedure
  • Chronic deep vein thrombosis of left upper limb following procedure
  • Chronic deep vein thrombosis of right upper limb following procedure
  • Chronic deep venous thrombosis of bilateral upper extremities
  • Chronic deep venous thrombosis of left upper extremity
  • Chronic deep venous thrombosis of right upper extremity
  • Chronic deep venous thrombosis of upper extremity as complication of procedure
  • Peripheral vascular complication of procedure
  • Phlebitis due to procedure
  • Phlebitis during procedure
  • Postoperative stenosis of pulmonary vein
  • Postprocedural obstructed systemic venous pathway
  • Pulmonary vein stenosis
  • Thromboembolism of vein
  • Thromboembolus of vein following surgical procedure
  • Thrombophlebitis due to procedure
  • Thrombophlebitis during procedure
  • Thrombosis of cerebral venous sinus due to and following surgical procedure

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Complications of procedures, not elsewhere classified (T81). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ037
Complication of other surgical or medical care, injury, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Pulmonary Vein Stenosis

    obstruction of the pulmonary vein in one or multiple sites. the obstruction is the result of wall thickening and narrowing of the lumen of the vein.

Convert T81.72XA to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
997.2 Surg comp-peri vasc syst
Approximate The match is approximate rather than exact.
ICD-9-CM
997.79 Vascular comp vessel NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About T81.72XAOverview

Is T81.72XA a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report complication of vein following a procedure, not elsewhere classified, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in T81.72XA mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for complication of vein following a procedure, not elsewhere classified, such as an emergency visit or first evaluation.

What MS-DRG does T81.72XA group to?

When complication of vein following a procedure, not elsewhere classified, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 299, 300, 301, with relative weights from 0.7197 to 1.6327 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of T81.72XA?

Under the General Equivalence Mappings, complication of vein following a procedure, not elsewhere classified, initial encounter converts to ICD-9-CM 997.2 (surg comp-peri vasc syst) and 997.79 (vascular comp vessel NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.