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    v1.0.28
    OpenPayerBilling CodesProcedures / Professional ServicesHCPCS hcpcs-g8420-bmi-normal-no-follow-up-required
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    HCPCS Level II G8420: BMI Documented Normal, No Follow-Up Plan

    HCPCS Level II code G8420 indicates that a patient’s BMI is documented as within normal parameters and no follow-up plan is required; this represents a preventive/assessment service typically performed during an office or ambulatory primary care visit where vital signs and routine measurements are recorded and charted, and the documentation reflects that no additional weight-management interventions or scheduling are necessary.

    For related coverage guidance, see recent payer policy updates: Esophagogastroduodenoscopy (EGD) Coverage Policy, Magnetic Sphincter Augmentation for the Treatment of Gastroesophageal Reflux Disease (GERD), Serum Testing for Hepatic Fibrosis in the Evaluation and Monitoring of Chronic Liver Disease.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult attending a primary care or preventive health visit where vital signs and anthropometric measures are recorded. The medical assistant measures height and weight, and the clinician calculates BMI. The BMI falls within the normal range (18.5–24.9 kg/m2) and the clinician documents the result in the chart and determines that no further follow-up, weight-management counseling, or intervention is required. The visit may be billed as part of an evaluation and management visit or a preventive visit; the G8420 HCPCS Level II code is used to indicate that BMI was documented within normal parameters and no follow-up plan is required. Typical site of service: outpatient clinic, primary care office, or preventive care visit. Typical patient scenario: an asymptomatic adult with stable weight presenting for an annual wellness visit, requiring routine vital signs and BMI documentation, with no comorbid weight-related diagnoses and no additional nutrition or weight-management plan needed.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    99213Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutesCommonly billed for an established patient visit in which BMI is measured and documented as part of the exam and medical decision making.
    99396Periodic comprehensive preventive medicine reevaluation and management of an individual, established patient; 40–64 yearsUsed for annual wellness visits where BMI documentation is routine; G8420 may be reported as a quality/measurement code in the preventive workflow.
    99401Preventive medicine counseling and/or risk factor reduction intervention(s) provided to an individual; approximately 15 minutesUsed when counseling is provided; not used when no follow-up plan is required (as indicated by G8420).
    99420Administration and interpretation of health risk assessment instrumentMay be used in comprehensive preventive visits that include BMI as part of the assessment.
    96127Brief emotional/behavioral assessment with scoring and documentation per standardized instrumentMay be performed during comprehensive preventive visits; BMI documentation itself does not require this code but may accompany broader preventive screening.

    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…
    207R00000XInternal Medicine PhysicianA physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults…
    208D00000XGeneral Practice PhysicianA physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
    363L00000XNurse Practitioner(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
    367A00000XAdvanced Practice MidwifeAdvanced practice midwifery encompasses the independent provision of care during pregnancy, childbirth, and the postpartum period; sexual and reproduc…
    156FX1800XOpticianOpticians help fit eyeglasses and contact lenses, following prescriptions from Ophthalmologists and Optometrists. They also help customers decide whi…
    103K00000XBehavior AnalystA behavior analyst is qualified by at least a master's degree and Behavior Analyst Certification Board certification and/or a state-issued credential …
    163WX0003XInpatient Obstetric Registered NurseNursing Service Providers · Registered Nurse

    Related ICD-10-CM Codes

    26 rows

    ICD-10-CM CodeDescription
    E66.01Morbid (severe) obesity due to excess calories
    E66.1Drug-induced obesity
    E66.2Morbid (severe) obesity with alveolar hypoventilation
    E66.3Overweight
    E66.9Obesity, unspecified
    R63.4Abnormal weight loss
    R63.5Abnormal weight gain
    Z00.00Encounter for general adult medical examination without abnormal findings
    Z00.121Encounter for routine child health examination with abnormal findings
    Z00.129Encounter for routine child health examination without abnormal findings

    Showing 1–10 of 26

    Related Payer Policy Updates

    Specialty: Gastroenterology1 / 3

    10 rows

    PolicyPayerEffective Date
    Esophagogastroduodenoscopy (EGD) Coverage Policyevicore2026-11-05
    Magnetic Sphincter Augmentation for the Treatment of Gastroesophageal Reflux Disease (GERD)univerahealthcare2026-10-15
    Serum Testing for Hepatic Fibrosis in the Evaluation and Monitoring of Chronic Liver DiseaseOscar Health2026-10-01
    Fecal Analysis in the Diagnosis of Intestinal Dysbiosis and Fecal Microbiota Transplant TestingOscar Health2026-10-01
    Pancreatic Enzyme Testing for Acute PancreatitisOscar Health2026-10-01
    Helicobacter pylori TestingOscar Health2026-10-01
    Celiac Disease TestingOscar Health2026-10-01
    Laboratory Testing for the Diagnosis of Inflammatory Bowel DiseaseOscar Health2026-10-01
    Percutaneous Electrical Nerve Field Stimulation (PENFS)Cigna2026-09-15
    Colorectal Cancer ScreeningBlue Cross Blue Shield - New Mexico2026-09-04

    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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