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Official Description

Hepatitis A and hepatitis B vaccine (HepA-HepB), adult dosage, for intramuscular use

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 90636 refers to the Hepatitis A and Hepatitis B vaccine (HepA-HepB) specifically formulated for adult dosage and intended for intramuscular administration. Vaccines, unlike immune globulins that offer short-term, passive immunity, are designed to provide active, long-term immunity. This is achieved by introducing altered versions of specific viruses or bacteria into the recipient's immune system, prompting it to produce its own antibodies against these pathogens. The immune system retains a memory of these antibodies, enabling a quicker and more effective response upon subsequent exposures to the same antigens. The Hepatitis A vaccine offers significant protection against severe liver diseases, which can lead to hospitalization or even death, while the Hepatitis B vaccine safeguards against serious health issues, including hepatocellular carcinoma. The vaccine can be derived from the blood plasma of asymptomatic carriers or produced through recombinant technology, where a plasmid containing the hepatitis gene is inserted into common baker's yeast. This yeast is then lysed, and the components are purified to create the vaccine. The codes associated with hepatitis vaccines for intramuscular use include specific codes for different dosages and schedules, with code 90636 designated for the adult dosage of the combined HepA-HepB vaccine.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The Hepatitis A and Hepatitis B vaccine (HepA-HepB) is indicated for adults who require immunization against both hepatitis A and hepatitis B viruses. This vaccine is particularly recommended for individuals at increased risk of exposure to these viruses, including:

  • Travelers to areas where hepatitis A is endemic or where hepatitis B is prevalent.
  • Healthcare workers who may be exposed to blood or bodily fluids that could contain the hepatitis viruses.
  • Individuals with chronic liver disease who are at higher risk for complications from hepatitis infections.
  • Men who have sex with men and other individuals with multiple sexual partners.
  • Injection drug users who may share needles or other drug paraphernalia.
  • Individuals with occupational exposure to blood or body fluids, such as first responders and laboratory personnel.

2. Procedure

The administration of the Hepatitis A and Hepatitis B vaccine (HepA-HepB) involves several key procedural steps to ensure proper delivery and effectiveness of the vaccine:

  • Step 1: Preparation - Prior to administration, the healthcare provider must prepare the vaccine by checking the expiration date and ensuring that the vaccine is stored at the appropriate temperature. The vial should be gently swirled to mix the contents without shaking, which can damage the vaccine.
  • Step 2: Patient Assessment - The healthcare provider should assess the patient’s medical history, including any previous allergic reactions to vaccines, current medications, and any contraindications to vaccination. Informed consent should be obtained from the patient or guardian.
  • Step 3: Site Selection - The vaccine is administered intramuscularly, typically in the deltoid muscle of the upper arm for adults. The site should be cleaned with an alcohol swab to reduce the risk of infection.
  • Step 4: Injection - Using a sterile syringe and needle, the healthcare provider will inject the vaccine into the muscle at a 90-degree angle. The needle should be inserted quickly and smoothly to minimize discomfort.
  • Step 5: Post-Administration Care - After the injection, the healthcare provider should apply gentle pressure to the injection site with a cotton ball or gauze. The patient should be monitored for a short period for any immediate adverse reactions.

3. Post-Procedure

Post-procedure care for the Hepatitis A and Hepatitis B vaccine includes advising the patient on potential side effects, which may include soreness at the injection site, mild fever, or fatigue. Patients should be informed that these symptoms are generally mild and resolve within a few days. It is also important to instruct patients to report any severe or unusual reactions, such as difficulty breathing or swelling of the face and throat, which may indicate an allergic reaction. Follow-up appointments may be necessary to complete the vaccination series if additional doses are required, depending on the specific vaccination schedule recommended for the individual patient.

Short Descr HEP A/HEP B VACC ADULT IM
Medium Descr HEPATITIS A & B VACCINE HEPA-HEPB ADULT IM
Long Descr Hepatitis A and hepatitis B vaccine (HepA-HepB), adult dosage, for intramuscular use
Status Code Excluded from Physician Fee Schedule by Regulation
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 9 - Not Applicable
Multiple Procedures (51) 9 - Concept does not apply.
Bilateral Surgery (50) 9 - Concept does not apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 9 - Concept does not apply.
Co-Surgeons (62) 9 - Concept does not apply.
Team Surgery (66) 9 - Concept does not apply.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Items and Services Packaged into APC Rates
ASC Payment Indicator Packaged service/item; no separate payment made.
Type of Service (TOS) 1 - Medical Care
Berenson-Eggers TOS (BETOS) P6C - Minor procedures - other (Medicare fee schedule)
MUE 1
CCS Clinical Classification 228 - Prophylactic vaccinations and inoculations
GY Item or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit
JZ Zero drug amount discarded/not administered to any patient
GA Waiver of liability statement issued as required by payer policy, individual case
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
27 Multiple outpatient hospital e/m encounters on the same date: for hospital outpatient reporting purposes, utilization of hospital resources related to separate and distinct e/m encounters performed in multiple outpatient hospital settings on the same date may be reported by adding modifier 27 to each appropriate level outpatient and/or emergency department e/m code(s). this modifier provides a means of reporting circumstances involving evaluation and management services provided by physician(s) in more than one (multiple) outpatient hospital setting(s) (eg, hospital emergency department, clinic). note: this modifier is not to be used for physician reporting of multiple e/m services performed by the same physician on the same date. for physician reporting of all outpatient evaluation and management services provided by the same physician on the same date and performed in multiple outpatient setting(s) (eg, hospital emergency department, clinic), see evaluation and management, emergency department, or preventive medicine services codes.
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
95 Synchronous telemedicine service rendered via a real-time interactive audio and video telecommunications system: synchronous telemedicine service is defined as a real-time interaction between a physician or other qualified health care professional and a patient who is located at a distant site from the physician or other qualified health care professional. the totality of the communication of information exchanged between the physician or other qualified health care professional and the patient during the course of the synchronous telemedicine service must be of an amount and nature that would be sufficient to meet the key components and/or requirements of the same service when rendered via a face-to-face interaction. modifier 95 may only be appended to the services listed in appendix p. appendix p is the list of cpt codes for services that are typically performed face-to-face, but may be rendered via a real-time (synchronous) interactive audio and video telecommunications system.
CR Catastrophe/disaster related
GC This service has been performed in part by a resident under the direction of a teaching physician
GW Service not related to the hospice patient's terminal condition
GX Notice of liability issued, voluntary under payer policy
GZ Item or service expected to be denied as not reasonable and necessary
SA Nurse practitioner rendering service in collaboration with a physician
SL State supplied vaccine
TW Back-up equipment
UA Medicaid level of care 10, as defined by each state
X1 Continuous/broad services: for reporting services by clinicians, who provide the principal care for a patient, with no planned endpoint of the relationship; services in this category represent comprehensive care, dealing with the entire scope of patient problems, either directly or in a care coordination role; reporting clinician service examples include, but are not limited to: primary care, and clinicians providing comprehensive care to patients in addition to specialty care
Date
Action
Notes
2011-01-01 Changed Short description changed.
1999-01-01 Added First appearance in code book in 1999.
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