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    v1.0.28
    OpenPayerBilling CodesProcedures / Professional ServicesHCPCS hcpcs-g9991-pneumococcal-vaccine-received-age-19-plus
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    HCPCS G9991: Pneumococcal Vaccine Received, Age 19+

    HCPCS Level II code G9991 documents that a patient received any pneumococcal conjugate or polysaccharide vaccine on or after their 19th birthday and before the end of the measurement period; this represents a vaccination administration service typically provided in outpatient clinics, primary care offices, community health centers, or pharmacy vaccination sites and is used for clinical quality measurement and immunization records during the measurement period.

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    Clinical & Coding Specifications

    Clinical Context

    A 67-year-old adult presents to a primary care clinic during a scheduled wellness visit. The patient’s immunization record indicates no pneumococcal vaccine documented since turning 19. After reviewing medical history and allergy status, the clinician administers a pneumococcal conjugate or polysaccharide vaccine during the visit. The encounter includes counseling on vaccine benefits, assessment of prior adverse reactions, and documentation of vaccine manufacturer, lot number, route, site, and date. The service is billed using G9991 to indicate the patient received any pneumococcal vaccine on or after their 19th birthday during the measurement period. Typical workflow steps: verify eligibility and prior immunizations, obtain consent, administer vaccine intramuscularly, observe for immediate adverse reaction, document vaccine details in the medical record and immunization registry, and submit G9991 on the claim with appropriate modifiers if applicable.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    90471Immunization administration (single vaccine/toxoid) intramuscular or subcutaneousCommonly reported for single vaccine administration when a payer requires a CPT administration code alongside or instead of HCPCS billing; documents the act of administering the pneumococcal vaccine.
    90472Each additional vaccine/toxoid administered (List separately in addition to code for primary procedure)Used when more than one vaccine is administered during the same encounter in addition to the primary vaccine.
    90732Pneumococcal polysaccharide vaccine, 23-valent (PPSV23), adult dosageSpecific vaccine product code that may be reported when documenting the vaccine type administered during the visit; used in clinical workflow to specify product.
    90670Pneumococcal conjugate vaccine (PCV20)CPT code for pneumococcal conjugate vaccine formulations given to adults; reported to indicate the vaccine product when required.
    90736Pneumococcal conjugate vaccine, 13-valent (PCV13)Code for PCV13 when administered; used to document specific vaccine product in the claim or immunization record.

    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
    208000000XPediatrics PhysicianA pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectru…
    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…
    363A00000XPhysician AssistantA physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and…
    363L00000XNurse Practitioner(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
    3336C0002XClinic PharmacyA pharmacy in a clinic, emergency room or hospital (outpatient) that dispenses medications to patients for self-administration under the supervision o…
    2251S0007XSports Physical TherapistA licensed physical therapist, including but not limited to an individual who is a Board Certified Specialist in Sports Physical Therapy, who has demo…
    207SM0001XMolecular Genetic Pathology (Medical Genetics) PhysicianA board certified subspecialty, the molecular genetic pathologist is expert in the principles, theory and technologies of molecular biology and molecu…
    261QB0400XBirthing Clinic/CenterA freestanding birth center is a health facility other than a hospital where childbirth is planned to occur away from the pregnant woman's residence, …

    Related ICD-10-CM Codes

    27 rows

    ICD-10-CM CodeDescription
    A41.9Sepsis, unspecified organism
    B20Human immunodeficiency virus [HIV] disease
    D50.9Iron deficiency anemia, unspecified
    E11.9Type 2 diabetes mellitus without complications
    E78.5Hyperlipidemia, unspecified
    F17.210Nicotine dependence, cigarettes, uncomplicated
    F32.9Major depressive disorder, single episode, unspecified
    I10Essential (primary) hypertension
    I50.9Heart failure, unspecified
    J12.9Viral pneumonia, unspecified

    Showing 1–10 of 27

    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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