© Copyright 2026 American Medical Association. All rights reserved.
The CPT® Code 90651 refers to the Human Papillomavirus (HPV) vaccine, specifically the nonavalent (9vHPV) formulation. This vaccine is designed for intramuscular administration and is available in both 2-dose and 3-dose schedules. Vaccines, unlike immune globulins that provide temporary immunity, work by stimulating the recipient's immune system to recognize and combat specific pathogens. The HPV vaccine targets a group of over 100 viruses, some of which are responsible for benign warts, while others are associated with higher risks of developing cervical cancer. By introducing a modified version of these viruses, the vaccine prompts the immune system to produce antibodies, thereby establishing long-term immunity. It is crucial for the vaccine to be administered before the individual is exposed to the virus to effectively prevent infection and its potential long-term consequences, such as cancer. The 9vHPV vaccine covers nine HPV types, including 6, 11, 16, 18, 31, 33, 45, 52, and 58, which are linked to various cancers globally. This code specifically reports the supply of the nonavalent vaccine, distinguishing it from other HPV vaccines, such as the quadrivalent (4vHPV) and bivalent (2vHPV) vaccines, which target fewer HPV types.
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