CPT® Code 89280

Assisted oocyte fertilization is a specialized reproductive technology that involves the precise introduction of a single spermatozoon directly into the interior of a mature oocyte, which is the female reproductive cell. This technique is particularly beneficial in cases where the male partner presents with significantly low sperm counts or a high proportion of immotile sperm, which can hinder natural fertilization. Prior to the fertilization process, the oocytes undergo a preparation phase where their outer protective layers, including the granulosa cells, cumulus oophorus, and corona radiata, are carefully removed. This can be achieved through mechanical means or by utilizing specific enzymes that facilitate the stripping of these layers. Once the oocytes are prepared, they are examined under a microscope to confirm their maturity, which is typically indicated by the presence of an extruded first polar body. Concurrently, the spermatozoa are also assessed microscopically and isolated from various sources such as seminal fluid, testicular tissue, epididymal fluid, or urine. The actual fertilization process employs micro-mechanical techniques performed under high-power magnification, allowing for the careful selection and manipulation of a single sperm. The selected sperm is grasped by its tail using an injection pipette, while the oocyte is held in place with a separate holding pipette. The sperm is then injected into the cytoplasm of the oocyte, which is subsequently monitored to ensure that both the zona pellucida and oolemma have been successfully penetrated, confirming that fertilization is underway. Approximately 24 hours post-injection, the oocyte is re-examined to verify that fertilization has occurred. This procedure is coded as CPT® Code 89280 when performed on 10 or fewer oocytes, while CPT® Code 89281 is designated for cases involving more than 10 oocytes.