About Our Doctors

A picture of Dr. TaftThomas A. Taft, MD

Dr. Taft has been setting the highest standards of excellence in medicine for over 30 years! He is a graduate of the Medical College of Wisconsin, where he specialized in internal medicine and infectious diseases. A highly esteemed member of the medical community, Dr. Taft has been consistently named as one of Milwaukee's "Top Docs" in the Top Doctors issues of Milwaukee Magazine since 1990. He is a published author and the current President and a partner of Infectious Disease Specialists of Southeastern WI. He is also an active member in many leading medical organizations, including the:

  • American Board of Preventive Medicine: HBO Certified
  • American Board of Internal Medicine
  • American Board of Internal Medicine; Infectious Diseases

He is also associated with the following Milwaukee area hospital networks: ProHealth, Froedtert, Aurora and Ascension.

A picture of Dr TimmWilliam D. Timm, MD

Dr. Timm has been delivering the highest quality medical care to his patients for over 20 years. After earning his doctoral degree from the Medical College of Wisconsin, Dr. Timm completed a specialized post-graduate fellowship in infectious diseases. He is the Vice President and partner of Infectious Disease Specialists of Southeastern WI.

A highly regarded medical professional, Dr. Timm has been named a "Top Doc" in Milwaukee Magazine's Top Doctors Issue on several occasions.  Dr. Timm is the medical director for the Milwaukee Comprehensive Wound Healing Center and chief supervising physician for the Wheaton Franciscan/Ascension Hyperbaric Medicine Center. He is also the Infection Control Chairman and Hospital Epidemiologist for Elmbrook Memorial Hospital.  He is a member of the Infectious Disease Society of America, the American College of Physicians, the Milwaukee Surgical Society, the American Academy of Wound Management, and the College of Certified Wound Specialists.  In addition, he has served as past President of the Infectious Disease Society of Milwaukee.  Dr. Timm is associated with the following Milwaukee area hospital networks: ProHealth, Froedtert, Aurora and Ascension.

A picture of Dr LetzerDavid M. Letzer, DO

Dr. Letzer has been providing top-notch medical care to his community for over 25 years. After graduating from the Michigan State University College of Osteopathic Medicine, he completed his residency at Botsford General Hospital, Michigan in internal medicine and then completed his Fellowship at the Medical College of Wisconsin in infectious diseases. He is Board Certified in Internal Medicine and Infectious Diseases.

A well respected member of the medical community.      Dr. Letzer has been named as a "Top Doc" in Milwaukee Magazine by his peers for several years. He is the Secretary/Treasurer and partner of Infectious Disease Specialists of Southeastern WI, and the Infectious Disease Control Director at both the ProHealth Hospitals as well as Community Memorial Hospital. He is also a member of the:

  • Infectious Disease Society of Milwaukee
  • American Osteopathic Association
  • American Society of Microbiology; Pharmacy & Therapeutic Committees

Dr. Letzer is associated with the following Milwaukee area hospital networks: ProHealth, Froedtert, Aurora and Ascension. In his spare time, he enjoys giving back to his community as the Medical Director of Richard's Place, a home for patients suffering from HIV/AIDS.

A Picture of Dr BerroyaMaye R. Berroya, MD

Dr. Berroya has nearly 20 years of experience in treating infectious disease patients with the highest quality medical care. A graduate of the University of the East Ramon Magsaysay-Memorial Medical Center, Dr. Berroya completed her residency at The New York Hospital Medical Center of Queens and her Infectious Disease Fellowship at the University of New York at Stony Brook. She is a physician employed by Infectious Disease Specialists of Southeastern WI and generally sees her patients on an inpatient level.

A valued member of the medical community, Dr. Berroya is board-certified by the American Board of Internal Medicine and the American Board of Internal Medicine - Infectious Diseases, as well as an active member in many leading medical organizations, such as the American College of Physicians, the American Medical Association and the Infectious Disease Society of America.

Dr Berroya is associated with the following area hospital networks: ProHealth, Froedtert, Aurora and Ascension