95165
Professional services for the supervision of preparation and provision of antigens for allergen immunotherapy; single or multiple antigens
CPT code 95165 describes the professional service of supervising the preparation and provision of antigens for allergen immunotherapy, commonly known as allergy shots. This procedure involves the complex formulation of customized allergenic extracts tailored to a specific patient's sensitivities. The clinical process begins with an evaluation of the patient's allergic profile, usually determined through previous percutaneous or intradermal skin testing (CPT 95004-95024) or in vitro testing. Based on these results, a physician or qualified healthcare professional calculates the precise concentrations and mixing ratios for various allergens, which may include tree, grass, or weed pollens, animal danders, dust mites, molds, or stinging insect venoms. The preparation must occur in a sterile environment, often involving the serial dilution of concentrated bulk extracts using sterile diluents such as buffered saline or human serum albumin with glycerin. Each 'dose' (aliquot) represents the volume of antigen that will be administered in a single injection; however, for administrative and billing purposes, many payers define a dose as a 1.0 ml volume. The professional service encompasses the supervision of the compounding process, ensuring the potency and stability of the extracts, maintaining sterile technique, and documenting the formulation and concentration of each vial. This code is specifically for the vial preparation and is distinct from the administration of the injection itself. It is reported based on the number of doses prepared, reflecting the time, expertise, and material costs associated with the specific volume of antigens provided to the patient for their treatment course.
Clinical Indications
- Allergic rhinitis (seasonal or perennial)
- Allergic conjunctivitis
- Extrinsic (allergic) asthma
- Hymenoptera (stinging insect) hypersensitivity
- Chronic rhinosinusitis with an underlying allergic etiology
- Inadequate response to traditional pharmacotherapy (antihistamines, nasal steroids)
- Patient preference to reduce long-term medication use for allergies
- High risk of severe systemic reactions from environmental allergen exposure
Procedure Steps
- Review patient allergy test results to identify clinically significant triggers.
- Calculate the starting and maintenance concentrations for each specific allergen.
- Select appropriate standardized or non-standardized allergenic extracts.
- Perform aseptic preparation in a clean-room or controlled environment.
- Aseptically transfer calculated volumes of extracts into a sterile multidose vial.
- Add sterile diluent (e.g., normal saline or glycerin) to reach the required volume.
- Label the prepared vial with the patient's name, allergen contents, concentration, and expiration date.
- Document the preparation in the patient's medical record, including the specific lot numbers of extracts used.
- Verify the final mixture against the physician's signed treatment plan.
Coding Guidelines
- Report 95165 for the preparation of the antigen vials only; do not include the injection service.
- The code is reported per dose. If a 10ml vial is prepared and the maintenance dose is 1ml, report 10 units.
- Medicare and most commercial payers define a 'dose' as 1.0 ml of the extract, regardless of the volume injected.
- Do not report 95165 on the same day as an Evaluation and Management (E/M) service unless the E/M is significant and separately identifiable (modifier 25).
- The injection of the antigen is reported separately using 95115 (single injection) or 95117 (two or more injections).
- Ensure documentation supports the number of doses billed based on the total volume of the vial prepared.
- For stinging insect venom, use 95145-95149 instead of 95165 when appropriate.