Medical Team

Real doctors. Real licenses. All 50 states.

Every Antha prescriber is a licensed physician - most of them OB/GYNs - and our team is collectively licensed to practice in all 50 states.

Our doctors

Prescriber	Specialty	Licensed to practice in
Teresa Walsh, MD	OB/GYN	44 statesAK, AZ, CA, CO, CT, DE, FL, GA, HI, ID, IL, IN, IA, KY, ME, MD, MA, MI, MN, MO, MT, NE, NV, NH, NJ, NM, NY, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WI, WY
Allison Hill, MD	OB/GYN	40 statesAL, AZ, CA, CO, CT, DE, FL, GA, ID, IL, IN, IA, KS, KY, LA, MD, MA, MI, MN, MS, MO, MT, NE, NV, NH, NJ, NY, NC, OH, OK, OR, PA, TN, TX, UT, VA, WA, WV, WI, WY
Kathryn Williams, MD	OB/GYN	40 statesAK, AZ, CA, CO, CT, FL, GA, HI, ID, IL, IN, IA, KY, LA, ME, MD, MA, MI, MT, NE, NV, NH, NJ, NY, NC, ND, OH, OK, OR, PA, SC, SD, TN, TX, UT, VT, VA, WA, WI, WY
Jillian Lopiano, MD	OB/GYN	28 statesAL, CA, CO, DE, FL, ID, IL, IN, KS, KY, LA, ME, MA, MI, MN, MO, MT, NE, NH, NJ, NY, OH, PA, TX, UT, VA, WI, WY
Paige Clark, MD	OB/GYN	28 statesAL, AK, AZ, CA, CO, CT, FL, GA, HI, ID, IL, IN, MD, MA, MI, MN, NJ, NY, OH, OR, PA, SC, SD, TN, TX, VA, WA, WI
Mehdi Parva, MD	OB/GYN	21 statesAL, AZ, CO, DE, HI, IN, LA, MI, MN, MT, NE, NV, NC, ND, OH, OK, PA, TN, UT, VA, WA
Irene Wahba, MD	OB/GYN	4 statesFL, NJ, PA, WA
Marc Serota, MD	Dermatology, Obesity Medicine, Allergy, Pediatrics	45 statesAL, AK, AZ, AR, CA, CO, CT, DE, FL, GA, HI, ID, IL, IN, IA, KS, KY, LA, ME, MD, MI, MO, MT, NE, NV, NH, NM, NY, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, WA, WV, WI, WY
Kyle Friez, MD	Emergency Medicine	41 statesAL, AZ, CO, CT, DE, FL, GA, HI, ID, IL, IN, IA, KS, KY, LA, ME, MD, MI, MN, MS, MO, MT, NE, NV, NH, NJ, NC, ND, OH, OK, PA, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY

Licensure as of August 2026, provided by our medical group. Several of our physicians hold additional licenses in the District of Columbia and U.S. territories.

Chief Medical Officer

Dr. Mary Leuchars, MD

Chief Medical Officer

Dr. Mary Leuchars, MD, is Antha's Chief Medical Officer. She has led medical affairs and clinical development across neuroscience, rare and inherited genetic disease, infectious disease, pulmonology, and gastroenterology, and has brought multiple novel therapeutics from development through launch. Her regulatory and clinical development experience runs from early stage to late. A specialist in medical communication with training in film and television as well as medicine, she has spent years coaching teams to explain complex science clearly to clinicians, regulators, and patients. At Antha she is responsible for clinical standards and for the accuracy of every medical claim we make.

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