HCPCS G8482: Influenza Immunization Administered or Previously Received

HCPCS Level II code G8482 documents that an influenza immunization was administered or previously received; the service represents vaccination administration and immunization history capture, typically provided in ambulatory primary care, community clinic, pharmacy, or public health vaccination settings and used for billing and reporting of flu vaccine encounters and immunization status.

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Clinical & Coding Specifications

Clinical Context

A 68-year-old patient presents to a primary care clinic during influenza season to receive an inactivated influenza vaccine. The patient has chronic obstructive pulmonary disease and diabetes mellitus, and the nurse verifies immunization history, documents informed consent, screens for contraindications (e.g., severe allergic reaction to prior influenza vaccine or egg allergy per current guidance), and administers the vaccine intramuscularly in the deltoid. The clinician documents date of administration, vaccine type/manufacturer, lot number, CVX code, route, site, and any adverse reaction observed. The encounter may occur at a physician office, community clinic, retail pharmacy, or long-term care facility; billing uses HCPCS Level II code G8482 to indicate influenza immunization administered at the encounter or previously received (for reporting immunization status). Typical workflow steps include registration and insurance eligibility check, clinical screening, vaccine administration by a licensed vaccinator, documentation and reporting to the immunization registry as required, and billing for the visit and vaccine using the appropriate codes and modifiers when applicable.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`90460`	Immunization administration through 18 years of age via any route, first vaccine/toxoid component; includes counseling when performed	If the patient is a child, this code captures vaccine administration with counseling; for adults, not applicable.
`90461`	Immunization administration through 18 years of age, each additional vaccine/toxoid component	Additional components when multiple pediatric vaccines are given at the same visit.
`90471`	Immunization administration (single vaccine) for person 3 years or older, intramuscular or subcutaneous	Commonly used for adult influenza vaccine administration when billing CPT rather than HCPCS.
`90472`	Each additional vaccine (same visit)	Used when more than one vaccine is administered in the same encounter for patients 3 years or older.
`99213`	Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes	Used when a significant E/M visit is performed at the same encounter as vaccine administration and documentation supports separate E/M billing.

Related Modifiers

6 rows

Modifier	Description	When to Use
22	Modifier –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…
23	Modifier -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…
52	Modifier ‑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…
53	Modifier 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…
56	Modifier ‑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…
62	Modifier 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 Code	Specialty	Notes
207Q00000X	Family Medicine Physician	Family 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…
207R00000X	Internal Medicine Physician	A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults…
363A00000X	Physician Assistant	A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and…
364S00000X	Clinical Nurse Specialist	A registered nurse who, through a graduate degree program in nursing, or through a formal post-basic education program or continuing education courses…
363L00000X	Nurse Practitioner	(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
103TF0000X	Family Psychologist	A psychologist whose specialty is founded on principles of systems theory with the interpersonal system of the family the focus of assessment, interve…
320900000X	Intellectual and/or Developmental Disabilities Community Based Residential Treatment Facility	A home-like residential facility providing habilitation, support and monitoring services to individuals diagnosed with intellectual and/or development…
103TC2200X	Clinical Child & Adolescent Psychologist	A psychologist who develops and applies scientific knowledge to the delivery of psychological services to infants, toddlers, children and adolescents …

Related ICD-10-CM Codes

27 rows

ICD-10-CM Code	Description
B34.9	Viral infection, unspecified
D50.9	Iron deficiency anemia, unspecified
E11.9	Type 2 diabetes mellitus without complications
E66.9	Obesity, unspecified
F17.200	Nicotine dependence, unspecified, uncomplicated
F17.210	Nicotine dependence, cigarettes, uncomplicated
I10	Essential (primary) hypertension
J00	Acute nasopharyngitis [common cold]
J06.9	Acute upper respiratory infection, unspecified
J10.1	Influenza due to other identified influenza virus with other respiratory manifestations

Showing 1–10 of 27

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

Frequently Asked Questions

References

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.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.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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Clinical & Coding Specifications

Clinical Context

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`90460`	Immunization administration through 18 years of age via any route, first vaccine/toxoid component; includes counseling when performed	If the patient is a child, this code captures vaccine administration with counseling; for adults, not applicable.
`90461`	Immunization administration through 18 years of age, each additional vaccine/toxoid component	Additional components when multiple pediatric vaccines are given at the same visit.
`90471`	Immunization administration (single vaccine) for person 3 years or older, intramuscular or subcutaneous	Commonly used for adult influenza vaccine administration when billing CPT rather than HCPCS.
`90472`	Each additional vaccine (same visit)	Used when more than one vaccine is administered in the same encounter for patients 3 years or older.
`99213`	Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes	Used when a significant E/M visit is performed at the same encounter as vaccine administration and documentation supports separate E/M billing.

Related Modifiers

6 rows

Modifier	Description	When to Use
22	Modifier –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…
23	Modifier -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…
52	Modifier ‑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…
53	Modifier 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…
56	Modifier ‑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…
62	Modifier 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 Code	Specialty	Notes
207Q00000X	Family Medicine Physician	Family 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…
207R00000X	Internal Medicine Physician	A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults…
363A00000X	Physician Assistant	A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and…
364S00000X	Clinical Nurse Specialist	A registered nurse who, through a graduate degree program in nursing, or through a formal post-basic education program or continuing education courses…
363L00000X	Nurse Practitioner	(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
103TF0000X	Family Psychologist	A psychologist whose specialty is founded on principles of systems theory with the interpersonal system of the family the focus of assessment, interve…
320900000X	Intellectual and/or Developmental Disabilities Community Based Residential Treatment Facility	A home-like residential facility providing habilitation, support and monitoring services to individuals diagnosed with intellectual and/or development…
103TC2200X	Clinical Child & Adolescent Psychologist	A psychologist who develops and applies scientific knowledge to the delivery of psychological services to infants, toddlers, children and adolescents …

Related ICD-10-CM Codes

27 rows

ICD-10-CM Code	Description
B34.9	Viral infection, unspecified
D50.9	Iron deficiency anemia, unspecified
E11.9	Type 2 diabetes mellitus without complications
E66.9	Obesity, unspecified
F17.200	Nicotine dependence, unspecified, uncomplicated
F17.210	Nicotine dependence, cigarettes, uncomplicated
I10	Essential (primary) hypertension
J00	Acute nasopharyngitis [common cold]
J06.9	Acute upper respiratory infection, unspecified
J10.1	Influenza due to other identified influenza virus with other respiratory manifestations

Showing 1–10 of 27

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

Frequently Asked Questions

References

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.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.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.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

HCPCS G8482: Influenza Immunization Administered or Previously Received

Sign up for hcpcs G8482 policy alerts

HCPCS G8482: Influenza Immunization Administered or Previously Received

Sign up for hcpcs G8482 policy alerts

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

References

HCPCS G8482: Influenza Immunization Administered or Previously Received

Sign up for hcpcs G8482 policy alerts

HCPCS G8482: Influenza Immunization Administered or Previously Received

Sign up for hcpcs G8482 policy alerts

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

What is the clinical context for using HCPCS Level II code `G8482` for influenza immunization?

Which CPT codes are related to influenza immunization administration using HCPCS Level II code `G8482`?

What ICD-10 codes are relevant to influenza immunization administration using HCPCS Level II code `G8482`?

Which payers cover HCPCS Level II code `G8482` for influenza immunization?

What is the primary diagnosis code used to indicate administration of a vaccine, including influenza, in the clinical context?

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Codes

What is the clinical context for using HCPCS Level II code `G8482` for influenza immunization?

Which CPT codes are related to influenza immunization administration using HCPCS Level II code `G8482`?

What ICD-10 codes are relevant to influenza immunization administration using HCPCS Level II code `G8482`?

Which payers cover HCPCS Level II code `G8482` for influenza immunization?

What is the primary diagnosis code used to indicate administration of a vaccine, including influenza, in the clinical context?

References