Maryann Simpson, NP

Maryann began her healthcare career after becoming a Registered Nurse in 1986 and spent eight years working in Labor & Delivery before earning her Advanced Practice Nurse Practitioner degree in 1994. She went on to spend approximately 20 years caring for patients at UC Davis.

It was during her time at UC Davis that Maryann became an early leader in bioidentical hormone replacement therapy (BHRT). Long before bioidentical hormones became widely discussed, she became the first provider at UC Davis to regularly implement bioidentical hormone replacement therapy as part of ongoing patient care.

Over the following three decades, hormone management became a central focus of Maryann’s clinical practice. Her extensive experience includes evaluating symptoms, interpreting comprehensive laboratory testing and developing individualized treatment plans for women and men experiencing hormonal changes.

Maryann also has extensive experience evaluating and managing thyroid conditions, including Hashimoto’s thyroiditis. Because symptoms such as fatigue, changes in mood, difficulty maintaining a healthy weight, poor concentration and low energy can overlap with hormonal concerns, she looks at thyroid health as part of the broader clinical picture when appropriate. Rather than relying on symptoms or a single laboratory value alone, her approach considers the patient’s history, symptoms and comprehensive laboratory findings together.

Today, Maryann continues to focus on personalized bioidentical hormone replacement therapy, thyroid management and long-term hormone optimization.