ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
DiagnosesAntiphospholipid Syndrome

Antiphospholipid Syndrome

ICD-10 Coding for Antiphospholipid Syndrome(D68.61)

PRIMARY SPECIALTYHematology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Antiphospholipid Syndrome?
Essential facts and insights about Antiphospholipid Syndrome

Key Clinical Considerations:

  • Presence of recurrent thrombosis (venous or arterial) and/or pregnancy-related complications such as recurrent miscarriages.
  • Positive laboratory tests for antiphospholipid antibodies, including lupus anticoagulant, anticardiolipin antibodies, and anti-beta-2 glycoprotein I antibodies.
  • Physical examination may reveal signs of thrombosis, such as swelling, pain, or discoloration in affected limbs.
  • Imaging studies may show evidence of thrombosis in veins or arteries, such as ultrasound for deep vein thrombosis or CT angiography for pulmonary embolism.
  • Severity may be assessed based on the frequency of thrombotic events and the presence of associated complications.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Document the patient's history of thrombosis and any pregnancy-related complications.
  • Use specific terminology such as 'antiphospholipid syndrome' and 'thrombotic events' in the medical record.
  • Examples include documenting the type and location of thrombosis, laboratory test results, and treatment plans.
  • Medical necessity must be established through documentation of symptoms, test results, and treatment rationale.
  • Quality measures may include tracking the frequency of thrombotic events and adherence to treatment protocols.

Coding Guidelines

Usage Guidelines & Examples

  • Use D68.61 for patients with confirmed antiphospholipid syndrome and documented thrombotic events.
  • Do not use this code for patients with isolated antiphospholipid antibodies without clinical manifestations.
  • Similar codes include D68.9 (coagulation defect, unspecified) and D68.89 (other specified coagulation defects), but these do not specify antiphospholipid syndrome.
  • Common errors include misclassifying patients with isolated antibodies as having antiphospholipid syndrome; ensure clinical criteria are met.
  • In complex cases, consider additional codes for associated conditions, such as venous thromboembolism.

Code Exclusions

Important Exclusions

  • Excludes conditions such as inherited thrombophilia (e.g., Factor V Leiden) and other coagulation disorders not related to antiphospholipid syndrome.
  • Alternative codes for excluded conditions may include D68.51 (Antithrombin deficiency) or D68.52 (Protein C deficiency).
  • Conditions are excluded because they have distinct pathophysiologies and treatment protocols.
  • Common mistakes include coding antiphospholipid syndrome when the patient has a different underlying coagulation disorder.
  • Related but distinct conditions include other autoimmune disorders that may cause thrombosis but do not meet the criteria for antiphospholipid syndrome.

Related ICD-10 Codes

Primary Codes
D68.61
Antiphospholipid syndrome
D68.9
Coagulation defect, unspecified
Ancillary Codes
O99.89
D68.61
when APS complicates pregnancy.
Differential Codes
D68.5
D68.5
for inherited thrombophilia, not for APS.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Hematology

Specialty Applications

  • Applies to patients diagnosed with antiphospholipid syndrome, particularly those with recurrent thrombosis.
  • Patient populations include adults and women of childbearing age, especially those with a history of pregnancy complications.
  • Clinical settings include outpatient hematology clinics, inpatient settings for acute thrombotic events, and emergency departments.
  • Specialty-specific applications are relevant in hematology, rheumatology, and obstetrics.
  • Treatment contexts include anticoagulation therapy and monitoring for thrombotic events.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Patient diagnosed with antiphospholipid syndrome based on clinical findings of recurrent thrombosis and positive antibody tests.'

Template 2

Template: 'Clinical presentation consistent with antiphospholipid syndrome including recurrent venous thromboembolism.'

Template 3

Template: 'Diagnostic criteria for antiphospholipid syndrome met as evidenced by positive lupus anticoagulant and history of thrombosis.'

Template 4

Template: 'Treatment plan initiated for antiphospholipid syndrome with anticoagulation therapy and regular follow-up.'

Template 5

Template: 'Follow-up care for antiphospholipid syndrome including monitoring for thrombotic events and laboratory tests.'

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this diagnosis?

Documentation must include clinical history, laboratory test results, and evidence of thrombotic events.

How does this differ from similar diagnoses?

Antiphospholipid syndrome is characterized by specific antibody presence and clinical manifestations, unlike other coagulation disorders.

What are common billing considerations?

Ensure accurate coding of associated conditions and document medical necessity to optimize claims.

What procedures are typically associated?

Commonly associated procedures include anticoagulation therapy management and monitoring for thrombotic events.

Are there any quality reporting implications?

Quality measures may include tracking treatment adherence and outcomes related to thrombotic events.