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    OpenPayerBilling CodesProcedures / Professional ServicesHCPCS hcpcs-g8839-sleep-apnea-symptom-assessment-snoring-daytime-sleepiness
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    HCPCS G8839: Sleep Apnea Symptom Assessment

    HCPCS Level II code G8839 describes an assessment of sleep apnea symptoms, documenting the presence or absence of snoring and daytime sleepiness; the service is a clinical symptom evaluation typically performed as an office-based or clinic-based sleep-related assessment to inform further diagnostic testing or management decisions.

    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 middle-aged adult presents to a primary care clinic with complaints of loud snoring, witnessed apneas at night reported by a bed partner, and excessive daytime sleepiness affecting work performance. The clinician conducts a targeted sleep apnea symptom assessment using G8839, documenting presence or absence of snoring, witnessed apneas, daytime sleepiness, morning headaches, and sleep fragmentation. The workflow includes focused history (Epworth Sleepiness Scale or similar), review of risk factors (obesity, neck circumference, hypertension), medication and substance use review, and physical exam elements related to airway (tonsillar hypertrophy, nasal obstruction). Based on findings, the clinician documents symptom severity and determines next steps such as ordering home sleep apnea testing, referral to a sleep medicine specialist or ENT, or initiating conservative measures. Typical sites of service are outpatient primary care clinics, sleep clinics, and ambulatory specialty clinics. Typical patient scenario: adult with chronic snoring and daytime somnolence undergoing standardized symptom assessment coded with G8839 as part of the evaluation for suspected obstructive sleep apnea.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    95810Polysomnography; sleep staging with continuous positive airway pressure (CPAP) titration, attendedPerformed when the G8839 assessment and clinical judgment indicate in-lab diagnostic testing and titration are needed.
    95806Sleep study, unattended polysomnography; recording of respiratory parameters for detection of sleep apneaUsed for diagnostic polysomnography that follows a positive symptom assessment under G8839.
    95800Polysomnography; sleep staging and recording, attendedServes as an in-lab diagnostic study that may be ordered after G8839 symptom assessment.
    95811Polysomnography for respiratory disturbance index (RDI) with initiation of CPAPUsed when assessment leads to in-lab titration for positive airway pressure therapy.
    94762Continuous positive airway pressure ventilation (CPAP) initiation and managementMay follow the assessment if treatment with CPAP is initiated and requires training and setup.

    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
    207P00000XEmergency Medicine PhysicianAn emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospit…
    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…
    363L00000XNurse Practitioner(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
    207L00000XAnesthesiology PhysicianAn anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an opera…
    2084P0800XPsychiatry PhysicianA Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, …
    163WX1100XOphthalmic Registered NurseNursing Service Providers · Registered Nurse
    283XC2000XChildren's Rehabilitation HospitalHospitals · Rehabilitation Hospital
    246RP1900XPhlebotomy TechnicianTechnologists, Technicians & Other Technical Service Providers · Technician, Pathology

    Related ICD-10-CM Codes

    29 rows

    ICD-10-CM CodeDescription
    E66.01Morbid (severe) obesity due to excess calories
    E66.09Other obesity due to excess calories
    F51.01Primary insomnia
    F51.02Adjustment insomnia
    F51.8Other sleep disorders not due to a substance or known physiological condition
    F51.9Sleep disorder not due to a substance or known physiological condition, unspecified
    G25.3Myoclonus
    G47.30Sleep apnea, unspecified
    G47.31Primary central sleep apnea
    G47.33Obstructive sleep apnea (adult) (pediatric)

    Showing 1–10 of 29

    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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