Which kind of doctor administers or prescribes tamoxifen?

It Depends: It depends on what the tamoxifen is being used to treat. If used to treat breast cancer, it is mostly prescribed by an oncologist. However, tamoxifen can also be used as treatment for severe breast pain/fibrocystic disease, or for breast cancer prevention. In those cases a primary care physician, general surgeon, or gynecologist may prescribe it.

Usually oncologists: Tamoxifen is given as part of treatment of breast cancer or for reducing the risk of getting breast cancer in high risk women. For treatment, it is usually given by a medical oncologist. Some breast or oncologic surgeons also prescribe it. As a preventetive medicine, in addition to above speciaists a family physician or a gynecologist may also prescribe it if they are familiar with it and are comfortable to prescribe it.

Oncologist: A medical or surgical oncologist usually prescribes tamoxifen, but breast surgeons and general internists can do so a well.