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CPT 77022: MR Guidance and Monitoring for Parenchymal Tissue Ablation

CPT code 77022 denotes MR imaging guidance and monitoring for the localization and ablation monitoring of parenchymal tissues. Nationally, the code matters because MR-guided ablation is a precision imaging service used in minimally invasive oncologic and non-oncologic procedures; accurate reporting separates the imaging guidance from the therapeutic ablation and affects facility and professional billing. Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

Readers will find a concise overview of the code’s clinical context and common service settings, an explanation of what is reported under the code (MR imaging guidance and real-time monitoring only), and what typical billing practice distinguishes this imaging service from the ablative procedure itself. The publication outlines typical site-of-service considerations and common modifiers used in practice. Where available, benchmarking material and payer coverage trends are summarized to inform coding and billing workflows, and policy updates relevant to MR-guided ablation imaging are highlighted. Data not available in the input will be noted as such.

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Billing Code Overview

CPT code 77022 describes magnetic resonance (MR) imaging guidance and monitoring used to locate parenchymal tissues and to monitor their ablation. This code is reported when the provider performs MR imaging guidance and real-time monitoring for an ablation procedure; it represents the imaging component only and does not include the ablative treatment itself.

Service type: Imaging guidance and monitoring for ablation procedures

Typical site of service: Hospital outpatient department or ambulatory surgical center, where MR-guided ablation procedures are commonly performed.

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CPT 77022: MR Guidance and Monitoring for Parenchymal Tissue Ablation

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Billing Code Overview

Service type: Imaging guidance and monitoring for ablation procedures

Typical site of service: Hospital outpatient department or ambulatory surgical center, where MR-guided ablation procedures are commonly performed.

Clinical & Coding Specifications

Clinical Context

A 62-year-old patient with a solitary 2.5 cm hepatic tumor (suspected hepatocellular carcinoma or metastatic lesion) is scheduled for percutaneous tumor ablation under magnetic resonance imaging (MRI) guidance. The clinical workflow begins with pre-procedure evaluation including review of prior imaging (CT/MRI), laboratory testing (coagulation profile, CBC, liver function tests), and informed consent. On the day of the procedure the patient is positioned in the MRI suite; IV access and monitoring are established; sedation or anesthesia is provided per anesthesiology or interventional radiology protocol. The interventional team uses real-time MRI to plan needle trajectory into the parenchymal tissue, confirm accurate placement of the ablation probe, and continuously monitor ablation extent to ensure margin adequacy and avoid adjacent critical structures. Post-ablation MRI sequences assess immediate treatment effect and exclude complications such as hemorrhage or thermal injury. The provider documents MRI guidance and monitoring only when no separate imaging interpretation or therapeutic procedure reporting overlaps this code.

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when only the interpreting physician’s professional work is reported for the MRI guidance/monitoring service.
`52`	Reduced services	Use when MRI guidance/monitoring is partially reduced or not performed to the full extent.
`53`	Discontinued procedure	Use when MRI guidance/monitoring is started but discontinued due to extenuating circumstances.
`59`	Distinct procedural service	Use when MRI guidance/monitoring is separate and distinct from other procedures performed the same day.
`62`	Two surgeons	Use when two surgeons of different specialties share responsibility for the procedure and both report services.
`76`	Repeat procedure by same physician	Use if MRI guidance/monitoring is repeated later the same day by the same physician (note: `76` is not listed in provided modifiers; see strict rules — Data not available in the input.)
`78`	Return to OR for related procedure following initial service	Use when MRI-guided monitoring leads to an immediate return for a related operative procedure (intra-procedural complication management).
`80`	Assistant Surgeon	Use when an assistant surgeon participates and billing requires the assistant surgeon modifier.
`22`	Increased procedural services	Use when the MRI guidance/monitoring requires substantially greater work than typical for the code (document justification).
`26`	Technical/professional split — duplicate entry avoided	Note: `26` already listed above.

Taxonomy Code	Specialty	Notes
208100000X	Diagnostic Radiology	Interventional radiologists performing MR-guided ablation and interpretation.
208000000X	Radiology (general)	Radiologists involved in MRI guidance and image interpretation.
186N00000X	Anesthesiology	Provides anesthesia/sedation during MR-guided ablation when required.
207K00000X	Surgery — General	Surgeons who perform or assist with percutaneous or open ablation procedures using MRI guidance.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
Data not available in the input.	Data not available in the input.	Data not available in the input.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`76942`	Ultrasonic guidance for needle placement (eg, aspirations, biopsies, injections), imaging supervision and interpretation	Alternative image-guidance modality sometimes used before or instead of MRI guidance for percutaneous ablation.
`47382`	Laparoscopy, surgical; ablation of liver tumor(s) (ie, cryotherapy, microwave, radiofrequency)	Surgical ablation procedures that may be performed with or without concurrent MRI guidance; documents the ablative therapy itself rather than imaging guidance.
`32663`	Thermal ablation, lung, percutaneous, including imaging guidance when performed	Example of a site-specific ablation code; imaging guidance (MRI monitoring) would be reported with `77022` in appropriate circumstances.
`88342`	Immunohistochemistry; per single antibody stain	Pathology testing sometimes performed on biopsy specimens obtained prior to ablation to confirm diagnosis.
`99152`	Moderate sedation services provided by the same physician performing the procedure, initial 30 minutes intra-service time	Billing for moderate sedation when provided by the proceduralist during MR-guided ablation; separate reporting rules apply.

CPT 77021: MR-Guided Needle Placement Imaging Supervision and Interpretation

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

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

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`26`	Professional component	Use when only the interpreting physician’s professional work is reported for the MRI guidance/monitoring service.
`52`	Reduced services	Use when MRI guidance/monitoring is partially reduced or not performed to the full extent.
`53`	Discontinued procedure	Use when MRI guidance/monitoring is started but discontinued due to extenuating circumstances.
`59`	Distinct procedural service	Use when MRI guidance/monitoring is separate and distinct from other procedures performed the same day.
`62`	Two surgeons	Use when two surgeons of different specialties share responsibility for the procedure and both report services.
`76`	Repeat procedure by same physician	Use if MRI guidance/monitoring is repeated later the same day by the same physician (note: `76` is not listed in provided modifiers; see strict rules — Data not available in the input.)
`78`	Return to OR for related procedure following initial service	Use when MRI-guided monitoring leads to an immediate return for a related operative procedure (intra-procedural complication management).
`80`	Assistant Surgeon	Use when an assistant surgeon participates and billing requires the assistant surgeon modifier.
`22`	Increased procedural services	Use when the MRI guidance/monitoring requires substantially greater work than typical for the code (document justification).
`26`	Technical/professional split — duplicate entry avoided	Note: `26` already listed above.

Taxonomy Code	Specialty	Notes
208100000X	Diagnostic Radiology	Interventional radiologists performing MR-guided ablation and interpretation.
208000000X	Radiology (general)	Radiologists involved in MRI guidance and image interpretation.
186N00000X	Anesthesiology	Provides anesthesia/sedation during MR-guided ablation when required.
207K00000X	Surgery — General	Surgeons who perform or assist with percutaneous or open ablation procedures using MRI guidance.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
Data not available in the input.	Data not available in the input.	Data not available in the input.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`76942`	Ultrasonic guidance for needle placement (eg, aspirations, biopsies, injections), imaging supervision and interpretation	Alternative image-guidance modality sometimes used before or instead of MRI guidance for percutaneous ablation.
`47382`	Laparoscopy, surgical; ablation of liver tumor(s) (ie, cryotherapy, microwave, radiofrequency)	Surgical ablation procedures that may be performed with or without concurrent MRI guidance; documents the ablative therapy itself rather than imaging guidance.
`32663`	Thermal ablation, lung, percutaneous, including imaging guidance when performed	Example of a site-specific ablation code; imaging guidance (MRI monitoring) would be reported with `77022` in appropriate circumstances.
`88342`	Immunohistochemistry; per single antibody stain	Pathology testing sometimes performed on biopsy specimens obtained prior to ablation to confirm diagnosis.
`99152`	Moderate sedation services provided by the same physician performing the procedure, initial 30 minutes intra-service time	Billing for moderate sedation when provided by the proceduralist during MR-guided ablation; separate reporting rules apply.

CPT 77021: MR-Guided Needle Placement Imaging Supervision and Interpretation

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

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

OpenPayer

CPT 77022: MR Guidance and Monitoring for Parenchymal Tissue Ablation

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Billing Code Overview

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CPT 77022: MR Guidance and Monitoring for Parenchymal Tissue Ablation

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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

CPT 77022: MR Guidance and Monitoring for Parenchymal Tissue Ablation

Sign up for cpt 77022 policy alerts

Billing Code Overview

CPT 77022: MR Guidance and Monitoring for Parenchymal Tissue Ablation

Sign up for cpt 77022 policy alerts

Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What does CPT 77022 describe and what does it include?

Which modifiers are commonly used with CPT 77022?

Where is MR guidance and monitoring reported under CPT 77022 typically performed?

What related CPT codes should be considered when billing around MR-guided ablation cases?

Which payers are referenced for coverage or benchmarking for CPT 77022?

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What does CPT 77022 describe and what does it include?

Which modifiers are commonly used with CPT 77022?

Where is MR guidance and monitoring reported under CPT 77022 typically performed?

What related CPT codes should be considered when billing around MR-guided ablation cases?

Which payers are referenced for coverage or benchmarking for CPT 77022?

References