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    v1.0.28
    OpenPayerBilling CodesProcedures / Professional ServicesHCPCS hcpcs-g9432-asthma-well-controlled-assessment-documented
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    HCPCS G9432: Asthma Well-Controlled by Standardized Score

    HCPCS Level II code G9432 documents that a patient’s asthma is well-controlled based on a standardized control assessment (ACT, c-ACT, ACQ, or ATAQ) with the score and results recorded in the medical record; this code represents a clinical assessment service typically performed in ambulatory primary care or specialty pulmonology/allergy clinic visits where asthma control is evaluated and documented.

    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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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A school-aged child with known persistent asthma presents for a routine follow-up visit in a primary care clinic or pediatric pulmonology outpatient clinic. The child is asymptomatic at the visit and the clinician administers or reviews an asthma control assessment tool such as the Asthma Control Test (ACT), Childhood Asthma Control Test (C-ACT), Asthma Control Questionnaire (ACQ), or Asthma Therapy Assessment Questionnaire (ATAQ). The patient scores indicate well-controlled asthma per the selected validated instrument, and the clinician documents the score, the date of administration, the tool used, and a brief note confirming that asthma is well controlled. This documentation is used to report G9432 to indicate asthma well-controlled based on the ACT/C-ACT/ACQ/ATAQ score and results documented.

    Typical workflow:

    • Patient checks in for scheduled asthma follow-up.

    • Medical assistant or nurse administers the selected control questionnaire or confirms a recent patient-completed score.

    • Clinician reviews score, performs brief focused respiratory exam, and documents score, interpretation (well-controlled), current medications, adherence, and any action plan updates.

    • If control is adequate, no escalation of therapy is documented; the visit note includes the instrument name and numeric score used to support G9432 reporting.

    Typical site of service:

    • Outpatient clinic (primary care or pediatric clinic) or subspecialty pulmonary/allergy clinic. School-based health centers and telehealth visits where the validated instrument is administered and documented are also typical settings.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    99212Office or other outpatient visit for the evaluation and management of an established patient, typically 10 minutesCommon E/M code for brief follow-up visits during which asthma control is assessed and G9432 documentation occurs

    99213 | Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes | Used for standard follow-up visits that include review of control test results, medication reconciliation, and brief management decisions

    94010 | Spirometry, including graphic record, total and timed vital capacity, with interpretation and report | Performed when objective lung function is needed in addition to control score to assess asthma status

    94640 | Pressurized or nonpressurized inhalation treatment for acute airway obstruction; nebulizer, handheld device, or intermittent positive pressure breathing (IPPB) | May be performed if patient demonstrates symptoms or requires inhaled bronchodilator during the visit despite a control score

    99406 | Smoking and tobacco use cessation counseling visit, intermediate, greater than 3 minutes up to 10 minutes | Counseling often documented during asthma follow-up visits if tobacco exposure is present and relevant to control

    Related Modifiers

    8 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…

    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…
    208000000XPediatrics PhysicianA pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectru…
    207RC0000XCardiovascular Disease PhysicianAn internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threaten…
    363A00000XPhysician AssistantA physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and…
    364SP2800XPerioperative Clinical Nurse SpecialistPhysician Assistants & Advanced Practice Nursing Providers · Clinical Nurse Specialist
    2472E0500XEEG TechnicianTechnologists, Technicians & Other Technical Service Providers · Technician, Other
    363LN0000XNeonatal Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers · Nurse Practitioner
    207PS0010XSports Medicine (Emergency Medicine) PhysicianAn emergency physician with special knowledge in sports medicine is responsible for continuous care in the field of sports medicine, not only for the …

    Related ICD-10-CM Codes

    27 rows

    ICD-10-CM CodeDescription
    E66.9Obesity, unspecified
    F17.200Nicotine dependence, unspecified, uncomplicated
    F17.210Nicotine dependence, cigarettes, uncomplicated
    I10Essential (primary) hypertension
    J30.9Allergic rhinitis, unspecified
    J44.9Chronic obstructive pulmonary disease, unspecified
    J45.20Mild intermittent asthma, uncomplicated
    J45.21Mild intermittent asthma with (acute) exacerbation
    J45.22Mild intermittent asthma with status asthmaticus
    J45.30Mild persistent asthma, uncomplicated

    Showing 1–10 of 27

    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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    G0438 | Annual wellness visit, initial visit | Not directly linked but may be performed in the same outpatient setting where asthma control is reviewed