Measure ID: MIPS 360·Appropriate Use·2026 Performance Year

2026 MIPS Measure #360: Optimizing Patient Exposure to Ionizing Radiation: Count of Potential High Dose

Percentage of computed tomography (CT) and cardiac nuclear medicine (myocardial perfusion or infarct avid imaging) reports for all patients, regardless of age, that document a count of known previous CT (any type of CT) and cardiac nuclear medicine (myocardial perfusion or infarct avid imaging) studies that the patient has received in the 12-month period prior to the current study.

Process – High PriorityAppropriate UseImagingRadiology

Measure ID:MIPS 360 (Quality ID 360)

Collection:MIPS CQM

Topped Out:Yes

View CMS Spec ↗

Measure Specification

Eligible Population

All patients regardless of age

ANDPatient procedure during the performance period

Exclusions

None

Numerator

CT and cardiac nuclear medicine (myocardial perfusion or infarct avid imaging) reports that document a count of known previous CT (any type of CT) and cardiac nuclear medicine (myocardial perfusion or infarct avid imaging) studies that the patient has received in the 12-month period prior to the current study.

Reporting Codes

Performance Met:

G9321Count of previous CT (any type of CT) and cardiac nuclear medicine (myocardial perfusion or infarct avid imaging) studies documented in the 12-month period prior to the current study

Performance Not Met:

G9322Count of previous CT and cardiac nuclear medicine (myocardial perfusion or infarct avid imaging) studies not documented in the 12-month period prior to the current study, reason not given

VBCA Insights

Why This Measure Matters

When ordering CT or cardiac nuclear medicine scans, your reports should document how many prior imaging studies the patient has had in the past year. This prevents unnecessary repeat scans and helps clinicians make informed decisions about radiation exposure. The key is ensuring your radiology team (or you as the ordering provider) documents the count of previous high-dose studies. Cumulative radiation exposure matters—tracking it reduces redundant tests and protects patients from unwarranted exposure.

VBCA is a CMS-approved Qualified Clinical Data Registry (QCDR) that submits MIPS Measure 360 to the Quality Payment Program (QPP). Practices can report this measure as a MIPS Clinical Quality Measure (CQM) or through qualified registry submission.

🧮MIPS Score Simulator

Estimate only — actual CMS scoring may vary based on reporting method, data completeness, and annual rule updates.

Your Performance Rate:%Benchmarks vary by collection type

💡 Tip: Enter your performance rate to compare MIPS points across all collection types. The same rate can score differently depending on how you submit.

2026 MIPS 360 Benchmarks

Historical CMS benchmark deciles for MIPS quality measure 360 by collection type. Your performance rate falls into a decile, which determines your measure points (3–10).

MIPS CQMAvg. performance rate: 87.98%Topped Out

Decile	Performance Rate Range	Points
Decile 1	84.00 - 85.99%	1 – 1.9
Decile 2	86.00 - 87.99%	2 – 2.9
Decile 3	88.00 - 89.99%	3 – 3.9
Decile 4	90.00 - 91.99%	4 – 4.9
Decile 5	92.00 - 93.99%	5 – 5.9
Decile 6	94.00 - 95.99%	6 – 6.9
Decile 7	96.00 - 97.99%	7 – 7.9
Decile 8	98.00 - 98.99%	8 – 8.9
Decile 9	99.00 - 99.99%	9 – 9.9
Decile 10	100.00%	10

Specialty Measure Sets

Diagnostic Radiology

Related Measures

Appropriate Use

MIPS 065: Appropriate Treatment for Upper Respiratory Infection (URI)MIPS 066: Appropriate Testing for Pharyngitis MIPS 102: Prostate Cancer: Avoidance of Overuse of Bone Scan for Staging Low Risk Prostate MIPS 116: Avoidance of Antibiotic Treatment for Acute Bronchitis/Bronchiolitis MIPS 261: Referral for Otologic Evaluation for Patients with Acute or Chronic Dizziness MIPS 277: Sleep Apnea: Severity Assessment at Initial Diagnosis MIPS 331: Adult Sinusitis: Antibiotic Prescribed for Acute Viral Sinusitis (Overuse)MIPS 332: Adult Sinusitis: Appropriate Choice of Antibiotic: Amoxicillin With or Without Clavulanate MIPS 335: Maternity Care: Elective Delivery (Without Medical Indication) at < 39 Weeks (Overuse)MIPS 364: Optimizing Patient Exposure to Ionizing Radiation: Appropriateness: Follow-up CT MIPS 405: Appropriate Follow-up Imaging for Incidental Abdominal Lesions MIPS 406: Appropriate Follow-up Imaging for Incidental Thyroid Nodules in Patients MIPS 416: Emergency Medicine: Emergency Department Utilization of CT for Minor Blunt MIPS 421: Appropriate Assessment of Retrievable Inferior Vena Cava (IVC) Filters for Removal

Imaging

MIPS 145: Radiology: Exposure Dose Indices Reported for Procedures Using Fluoroscopy MIPS 364: Optimizing Patient Exposure to Ionizing Radiation: Appropriateness: Follow-up CT MIPS 405: Appropriate Follow-up Imaging for Incidental Abdominal Lesions MIPS 406: Appropriate Follow-up Imaging for Incidental Thyroid Nodules in Patients MIPS 415: Emergency Medicine: Emergency Department Utilization of CT for Minor Blunt

Radiology

MIPS 145: Radiology: Exposure Dose Indices Reported for Procedures Using Fluoroscopy MIPS 406: Appropriate Follow-up Imaging for Incidental Thyroid Nodules in Patients

Official Resources

📄 CMS Measure Specification (PDF)🔗 QPP Quality Payment Program

Clinical Context

Clinical Rationale

Increased CT use has resulted in growing rates of repeat or multiple imaging. Physicians may lack important information that could inform their decisions in ordering imaging exams that use ionizing radiation. Ordering physicians may not have access to patients’ medical imaging or radiation dose history. Due to insufficient information, physicians may unnecessarily order imaging procedures that have already been conducted.

Clinical Recommendations

Radiologists, medical physicists, radiologic technologists, and all supervising physicians have a responsibility to minimize radiation dose to individual patients, to staff, and to society as a whole, while maintaining the necessary diagnostic image quality. (Gunderman, et al., 2008)

Implementation Notes

This measure contains one strata defined by a single submission criteria. This measure produces a single performance rate. For the purposes of MIPS implementation, this procedure measure is submitted each time a procedure is performed during the performance period.

Frequently Asked Questions

Who is eligible for MIPS 360?

All final reports for patients, regardless of age, undergoing a CT or cardiac nuclear medicine (myocardial perfusion or infarct avid imaging) procedure.

Is MIPS 360 the same as MIPS 360?

Yes. CMS uses zero-padded three-digit Quality IDs (360) in official specifications, while clinicians often search for MIPS 360 or Quality ID 360 without the leading zero. Both refer to the same 2026 MIPS quality measure reported through the Quality Payment Program (QPP).

What codes do I submit for MIPS 360: Optimizing Patient Exposure to Ionizing Radiation: Count of Potential High Dose?

Submission codes: G9321 (Count of previous CT (any type of CT) and cardiac nuclear medicine (myocardial perfusion or infarct avid imaging) studies documented in the 12-month period prior to the current study); G9322 (Count of previous CT and cardiac nuclear medicine (myocardial perfusion or infarct avid imaging) studies not documented in the 12-month period prior to the current study, reason not given)

How do I report MIPS Measure 360 in 2026?

MIPS Measure 360 (Quality ID 360) is reported through the Quality Payment Program (QPP) as a MIPS Clinical Quality Measure (CQM) via qualified registry, or Medicare Part B claims where applicable.

Is MIPS 360 a topped-out measure?

Yes, MIPS 360 is currently topped out, which means most clinicians perform well on this measure and it may be subject to a 7-point scoring cap.

Report this measure through VBCA

Our QCDR handles measure selection, data validation, and submission—so you can focus on clinical performance.

Learn About Our QCDR →Talk to Us →