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CPT 93792: INR Monitor Training and Patient Device Instruction

CPT code 93792 covers face-to-face instruction and training on the care and use of an INR monitor, including how to obtain a blood sample and report results, with documentation of the training. This code is relevant nationally as self-testing and home-monitoring for anticoagulation management expand, supporting patient engagement and potentially reducing clinic visits. Primary payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will find a concise explanation of the clinical and billing context for 93792, typical settings where the service is delivered, and which payers commonly cover training services for INR monitoring. The publication also summarizes common modifiers and coding considerations, discusses reimbursement and billing practice benchmarks where available, and highlights policy and coverage themes affecting access to home INR monitoring instruction. The goal is to provide clinicians, billing specialists, and policy stakeholders with a clear national overview of how this service is coded, where it is performed, and the payer landscape relevant to home anticoagulation device training.

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Billing Code Overview

CPT code 93792 describes a face-to-face instruction and training session delivered by a physician or other qualified healthcare professional to a patient or caregiver on the use and care of an INR monitor. The service includes teaching how to obtain a blood sample, how to report INR results, and documentation of the training outcomes.

Service type: Patient education and device training
Typical site of service: Ambulatory clinic, outpatient anticoagulation clinic, or other face-to-face clinical setting where device instruction and hands-on training can be performed

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CPT 93792: INR Monitor Training and Patient Device Instruction

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Billing Code Overview

Service type: Patient education and device training
Typical site of service: Ambulatory clinic, outpatient anticoagulation clinic, or other face-to-face clinical setting where device instruction and hands-on training can be performed

Clinical & Coding Specifications

Clinical Context

A 68-year-old patient with atrial fibrillation who is being transitioned from warfarin management in clinic to patient self-testing using a point-of-care INR monitor receives a face-to-face training session from a clinician. The session is provided in an outpatient anticoagulation clinic or primary care office by a physician, nurse practitioner, physician assistant, or trained anticoagulation nurse. The clinician demonstrates device operation, proper fingerstick technique to obtain a capillary blood sample, quality control checks, interpretation of INR results, and procedures for reporting values and when to contact the clinic. The clinician documents the patient’s ability to perform the test, any barriers to home testing (vision, dexterity), and the results of return demonstrations or competency checks. Follow-up includes remote reporting of values, dose adjustments by telephone or portal communication, and periodic competency reassessment per clinic policy.

Coding Specifications

Modifier	Description	When to Use
`11`	Physician or service performed by the physician	When the service is performed personally by the billing physician rather than an auxiliary staff
`22`	Increased procedural services	When additional time or complexity beyond typical instruction is documented and justified
`23`	Unusual anesthesia	Not typically applicable; retained for contexts where anesthesia unexpectedly required
`52`	Reduced services	When the training session is abbreviated and fewer elements of instruction are provided
`53`	Discontinued procedure	When training is started but terminated due to patient intolerance or emergency
`55`	Postoperative management only	When only subsequent management is billed, not initial training (rare for this code)
`62`	Two surgeons or co-surgeons	Not typical for this nonprocedural service but used when two physicians share primary responsibility
`78`	Unplanned return to OR by same physician following initial procedure	Not applicable for routine training; included only if relevant in complex encounters
`80`	Assistant surgeon	Not applicable in most training encounters; reserved for operative contexts
`QK`	Medical direction of two or more assistants	Not applicable; retained for completeness in multi-provider directed care

Taxonomy Code	Specialty	Notes
207Q00000X	Family Medicine	Common primary care clinicians who provide anticoagulation education
363A00000X	Nurse Practitioner	Frequently delivers patient training and documents competency
207P00000X	Internal Medicine	Primary care physicians managing long-term anticoagulation
207L00000X	Cardiovascular Disease	Specialists who manage complex anticoagulation cases
364S00000X	Registered Nurse	Anticoagulation clinic nurses who provide hands-on device training

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I48.0`	Paroxysmal atrial fibrillation	Common indication for long-term anticoagulation and need for INR monitoring
`I48.1`	Persistent atrial fibrillation	Ongoing anticoagulation management where home INR monitoring may be used
`I48.91`	Unspecified atrial fibrillation	General AF diagnosis prompting warfarin therapy and patient education
`D68.4`	Acquired coagulation factor deficiency	Conditions that may necessitate close INR monitoring and patient training
`Z79.01`	Long term (current) use of anticoagulants	Descriptor indicating chronic anticoagulant therapy supporting need for INR self-testing
`Z51.89`	Encounter for other specified aftercare	Used for follow-up or training visits related to anticoagulation care
`R79.1`	Abnormal coagulation profile	May be present when monitoring therapy or verifying device results

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`93792`	Patient training and instruction for use of an INR monitor, face-to-face, and documentation of training	Primary service: face-to-face instruction and documented competency for home INR monitoring
`99213`	Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes	Commonly billed on the same day for evaluation and management related to anticoagulation therapy and device training
`99406`	Smoking and tobacco-use cessation counseling, intermediate, greater than 3 minutes up to 10 minutes	May be provided during the visit when counseling on modifiable bleeding risks is delivered (behavioral counseling adjunct)
`99078`	Physician or other qualified health care professional educational services provided in a group setting, per session	Used when standardized INR monitor training is delivered to a group of patients rather than individual face-to-face instruction
`36415`	Collection of venous blood by venipuncture	Performed if a confirmatory venous INR is required during the training visit

CPT 93793: INR Result Review and Warfarin Dose Adjustment

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`11`	Physician or service performed by the physician	When the service is performed personally by the billing physician rather than an auxiliary staff
`22`	Increased procedural services	When additional time or complexity beyond typical instruction is documented and justified
`23`	Unusual anesthesia	Not typically applicable; retained for contexts where anesthesia unexpectedly required
`52`	Reduced services	When the training session is abbreviated and fewer elements of instruction are provided
`53`	Discontinued procedure	When training is started but terminated due to patient intolerance or emergency
`55`	Postoperative management only	When only subsequent management is billed, not initial training (rare for this code)
`62`	Two surgeons or co-surgeons	Not typical for this nonprocedural service but used when two physicians share primary responsibility
`78`	Unplanned return to OR by same physician following initial procedure	Not applicable for routine training; included only if relevant in complex encounters
`80`	Assistant surgeon	Not applicable in most training encounters; reserved for operative contexts
`QK`	Medical direction of two or more assistants	Not applicable; retained for completeness in multi-provider directed care

Taxonomy Code	Specialty	Notes
207Q00000X	Family Medicine	Common primary care clinicians who provide anticoagulation education
363A00000X	Nurse Practitioner	Frequently delivers patient training and documents competency
207P00000X	Internal Medicine	Primary care physicians managing long-term anticoagulation
207L00000X	Cardiovascular Disease	Specialists who manage complex anticoagulation cases
364S00000X	Registered Nurse	Anticoagulation clinic nurses who provide hands-on device training

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I48.0`	Paroxysmal atrial fibrillation	Common indication for long-term anticoagulation and need for INR monitoring
`I48.1`	Persistent atrial fibrillation	Ongoing anticoagulation management where home INR monitoring may be used
`I48.91`	Unspecified atrial fibrillation	General AF diagnosis prompting warfarin therapy and patient education
`D68.4`	Acquired coagulation factor deficiency	Conditions that may necessitate close INR monitoring and patient training
`Z79.01`	Long term (current) use of anticoagulants	Descriptor indicating chronic anticoagulant therapy supporting need for INR self-testing
`Z51.89`	Encounter for other specified aftercare	Used for follow-up or training visits related to anticoagulation care
`R79.1`	Abnormal coagulation profile	May be present when monitoring therapy or verifying device results

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`93792`	Patient training and instruction for use of an INR monitor, face-to-face, and documentation of training	Primary service: face-to-face instruction and documented competency for home INR monitoring
`99213`	Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes	Commonly billed on the same day for evaluation and management related to anticoagulation therapy and device training
`99406`	Smoking and tobacco-use cessation counseling, intermediate, greater than 3 minutes up to 10 minutes	May be provided during the visit when counseling on modifiable bleeding risks is delivered (behavioral counseling adjunct)
`99078`	Physician or other qualified health care professional educational services provided in a group setting, per session	Used when standardized INR monitor training is delivered to a group of patients rather than individual face-to-face instruction
`36415`	Collection of venous blood by venipuncture	Performed if a confirmatory venous INR is required during the training visit

CPT 93793: INR Result Review and Warfarin Dose Adjustment

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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CPT 93792: INR Monitor Training and Patient Device Instruction

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Billing Code Overview

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CPT 93792: INR Monitor Training and Patient Device Instruction

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References