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    v1.0.28
    OpenPayerBilling CodesProcedures / Professional ServicesHCPCS hcpcs-g9322-missing-prior-cardiac-ct-nuclear-imaging-count
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    HCPCS G9322: Prior CT and Cardiac Nuclear Studies Not Documented

    HCPCS Level II code G9322 reports the count of prior CT and cardiac nuclear medicine studies (myocardial perfusion or infarct-avid imaging) that were not documented in the 12-month period before the current study; this represents a documentation and prior-study tracking service tied to imaging utilization, typically associated with diagnostic imaging services provided in an outpatient radiology or nuclear cardiology setting.

    For related coverage guidance, see recent payer policy updates: Esophagogastroduodenoscopy (EGD) Coverage Policy, Magnetic Sphincter Augmentation for the Treatment of Gastroesophageal Reflux Disease (GERD), Fecal Analysis in the Diagnosis of Intestinal Dysbiosis and Fecal Microbiota Transplant Testing.

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    Clinical & Coding Specifications

    Clinical Context

    A 68-year-old male with known ischemic heart disease is referred for a myocardial perfusion SPECT study to evaluate recurrent exertional chest pain and to compare with prior studies. During pre-test chart review and patient interview the imaging center cannot document the number of prior CT or cardiac nuclear medicine (myocardial perfusion or infarct avid) studies performed in the 12 months before the current study; no reason for the missing documentation is recorded. The imaging technologist logs this count as required for the record, and the facility bills G9322 to report the count of prior studies not documented in the prior 12-month period. Typical workflow: patient registration and clinical history collection → review of electronic medical record and external records for prior imaging → acquisition of myocardial perfusion or infarct-avid imaging study → documentation of prior-study count field when prior-study details are unavailable → charge capture and submission including G9322 as appropriate.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    78451Myocardial perfusion imaging, single study (e.g., rest OR stress), tomographic (SPECT)Commonly performed cardiac nuclear medicine study; G9322 documents prior studies when myocardial perfusion studies cannot be confirmed in the prior 12 months.
    78452Myocardial perfusion imaging, multiple studies (e.g., rest AND stress), tomographic (SPECT)Used when both rest and stress studies are performed; associated prior-study documentation may trigger G9322 reporting when prior counts are unknown.
    78801Positron emission tomography (PET) imaging, single acquisition, any number of regions; with single tracer, cardiac PET myocardial perfusionCardiac PET perfusion studies are sometimes used in place of SPECT; prior cardiac nuclear studies count may be reported with G9322 when documentation missing.
    71045Radiologic examination, chest; single view, frontalFrequently performed as an adjunct imaging study in pre-test evaluation; not a nuclear procedure but commonly performed in the same clinical workflow.
    93000Electrocardiogram, routine ECG with at least 12 leads; with interpretation and reportOften performed before or during cardiac stress testing associated with myocardial perfusion imaging; complements interpretation and clinical correlation.

    Related Modifiers

    9 rows

    ModifierDescriptionWhen to Use
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    23Modifier -23 (Unusual Anesthesia) is used on anesthesia service CPT codes when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia…- Use modifier -23 only on anesthesia CPT codes (00100–01999) when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia because of…
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    54Modifier ‑54 (“Surgical care only”) is appended to a CPT surgical procedure when the reporting surgeon performs the intraoperative (surgical) component but does not furnish the preoperative and/or…- Use modifier -54 when the reporting surgeon provided only the intraoperative (surgical) component of a procedure and preoperative and/or postoperative management has been or will be provided by…
    55Modifier –55 indicates the billing provider furnished only postoperative management for a procedure that has a global surgical period. According to AAPC, this modifier is appended to the same CPT…- Use modifier -55 when billing the same CPT surgical code that has a 10- or 90-day global period and you, as a provider other than the original surgeon, furnished ONLY postoperative management (no…
    56Modifier ‑56 indicates the reporting provider furnished only the preoperative management for a surgical procedure and did not perform the intraoperative or postoperative care. It is used in…- Use Modifier -56 when a provider performs only the preoperative management in a split‑care situation (one physician manages preop care while a different physician performs the intraoperative…
    62Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
    99Modifier 99 is a placeholder modifier used when more modifiers apply to a single procedure than the claim form or electronic field allows. The AMA classifies it under Provider Services and Ambulatory…- Use CPT modifier -99 when more modifiers apply to a single procedure line than the claim form or payer field allows (CMS/Noridian: when more than four modifiers are needed); append modifier 99 on…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    207Q00000XFamily Medicine PhysicianFamily Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadt…
    363L00000XNurse Practitioner(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
    163W00000XRegistered Nurse(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive…
    174MM1900XMedical Research VeterinarianOther Service Providers · Veterinarian
    173C00000XReflexologistReflexologists perform a non-invasive complementary modality involving thumb and finger techniques to apply alternating pressure to the reflexes withi…
    2080P0206XPediatric Gastroenterology PhysicianA pediatrician who specializes in the diagnosis and treatment of diseases of the digestive systems of infants, children and adolescents. This speciali…
    2471C3401XComputed Tomography Radiologic TechnologistA radiologic technologist who specializes in computed tomography (CT) and is appropriately educated and trained, consistent with nationally recognized…
    3336C0004XCompounding PharmacyA pharmacy that specializes in the preparation of components into a drug preparation as the result of a Practitioner's Prescription Drug Order or init…

    Related Payer Policy Updates

    Specialty: Gastroenterology1 / 3

    7 rows

    PolicyPayerEffective Date
    Esophagogastroduodenoscopy (EGD) Coverage Policyevicore2026-11-05
    Magnetic Sphincter Augmentation for the Treatment of Gastroesophageal Reflux Disease (GERD)univerahealthcare2026-10-15
    Fecal Analysis in the Diagnosis of Intestinal Dysbiosis and Fecal Microbiota Transplant TestingOscar Health2026-10-01
    Serum Testing for Hepatic Fibrosis in the Evaluation and Monitoring of Chronic Liver DiseaseOscar Health2026-10-01
    Pancreatic Enzyme Testing for Acute PancreatitisOscar Health2026-10-01
    Helicobacter pylori TestingOscar Health2026-10-01
    Celiac Disease TestingOscar Health2026-10-01

    Related Codes

    HCPCS-G9490-HOME-ASSESSMENT-NON-HOMEBOUND

    HCPCS G9490: Home Visit Patient Assessment for Non-Homebound Beneficiary

    HCPCS-G0008-INFLUENZA-VACCINE-ADMINISTRATION

    HCPCS G0008: Administration of Influenza Virus Vaccine

    HCPCS-G0009-PNEUMOCOCCAL-VACCINE-ADMINISTRATION

    HCPCS G0009: Administration of Pneumococcal Vaccine

    HCPCS-G0010-HEPATITIS-B-VACCINE-ADMINISTRATION

    HCPCS G0010: Administration of Hepatitis B Vaccine

    HCPCS-G0011-PREP-COUNSELING-HIV-RISK-REDUCTION-ADHERENCE

    HCPCS G0011: Individual PrEP Counseling, HIV Risk Assessment

    HCPCS-G0012-PRE-EXPOSURE-PROPHYLAXIS-INJECTION-HIV-PREVENTION

    HCPCS G0012: Injection of PrEP Drug for HIV Prevention

    HCPCS-G0013-PREP-INDIVIDUAL-COUNSELING-HIV-RISK-REDUCTION

    HCPCS G0013: Individual PrEP Counseling by Clinical Staff

    HCPCS-G0017-PSYCHOTHERAPY-CRISIS-FIRST-60-MINUTES-NON-OFFICE

    HCPCS G0017: Psychotherapy for Crisis, First 60 Minutes

    HCPCS-G0018-PSYCHOTHERAPY-CRISIS-ADDITIONAL-30-MINUTES-NON-OFFICE

    HCPCS G0018: Psychotherapy for Crisis, Additional 30 Minutes

    HCPCS-G0019-COMMUNITY-HEALTH-INTEGRATION-SDOH-CARE-COORDINATION

    HCPCS G0019: Community Health Integration, Person-Centered Assessment

    Showing 1–10 of 1996

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    Frequently Asked Questions

    References

    1. 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. 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. 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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