To schedule an appointment with any of our providers, please call 773-388-1600.

Magda Houlberg, MD
Chief Medical Officer

Education & Training
Antioch College, Bachelors of Science in Biology,
Rush University Medical College, MD
Internal Medicine Program, Rush University Medical College, Internship and Residency
Section of Geriatrics, Rush University Medical College, Geriatric Medicine Fellowship

Specialty
Internal Medicine
Geriatric Medicine

Professional History
Provider of Internal Medicine, HIV and geriatric medicine care at Howard Brown and an Assistant Professor in the Section of Geriatric Medicine and Palliative Care at Rush University Medical Center. Interests include LGBT aging, health promotion and interdisciplinary medical care for populations at risk.

Andrew Altiveros, MD
Medical Provider

Education & Training
University of Santo Tomas, Doctorate in Medicine

Specialty
Pediatrics

Professional History
Internship and Residency in Pediatrics, Stroger Cook County Hospital
Chief Resident for the Department of Pediatrics, Stroger Cook County Hospital

Danica Wilson, MD
Staff Physician

Education & Training
Tennessee State University Bachelors of Science in Biology with a minor in Chemistry
Ross University School of Medicine
St. Louis University Family Medicine Residency Program

Specialty
Family Medicine with interests in Women's Health, HIV, and Adolescent Medicine

Affliations
American Academy of Family Physicians, Member
American Medical Association, Member
Delta Sigma Theta Sorority, Inc, Member
National Coalition of 100 Black Women, Chicago Chapter, Member

Kristin Keglovitz Baker
Certified Physician Assistant, Clinic Director

Education and Training
MS Physician Assistant Studies Marquette University, August 2003
National Health Service Corps, September 2003-December 2005
BS Biochemistry, Marquette University Milwaukee, WI August 2002

Specialty
Family Practice, Women's Health, Pediatric/Adolescent Medicine

Professional History
Pediatrics/Family Practice Family HealthCare Network Visalia, CA 93291
Emergency Medicine Evanston Northwestern Healthcare Evanston, IL.

Cathy Creticos, MD
Attending Physician and Associate Medical Director

Education and Training
College: University of Chicago
Medical School: University of Chicago Pritzker School of Medicine
Internship and Residency: Loyola University of Chicago
Fellowship in Infectious Diseases: Loyola University and University of Illinois at Chicago

Specialty
Infectious Diseases and Internal Medicine

Professional History
Specialist and Consultant in infectious diseases at Advocate Illinois Masonic Medical Center and Rush North Shore Medical Center from 1987 to present; Medical Director of MATEC (Midwest AIDS Training and Education Center) since 1999, and Physician Educator for MATEC since 1994; Specialist for HIV care and treatment since 1986; Staff Physician at Howard Brown Health Center since 1996 (and interim Medical Director in the past at Howard Brown); Researcher in HIV related prevention and treatment studies for several years.

Alfred Torrence, MD
Staff Physician

Dr. Torrence is a board certified Internist. He received his M.D. from Oregon Health Sciences University in 1981. His internship and residency was completed in 1984 at the University of Illinois, Chicago. He served the indigent population as a member of the United States Public Health Service from 1984 through 1986. Dr. Torrence joined the staff of Northwestern Memorial Hospital and the faculty of Northwestern Medical School in 1986 as an Instructor of Clinical Medicine. He was in solo, private practice from 1986 through 1995. He was a founding partner of Northwestern Memorial Physician's Group and worked as vice president of operations until 2000 when he went back into private practice. Dr. Torrence joined Howard Brown's Triad office in 2011 because of his desire to serve Chicago's LGBT community. He is a member of the Endocrine Society and the National Lipid Association. He lives in Lakeview with his partner.

Joshua Branham
Certified Physician Assistant 

Education and Training
Masters of Medical Science: Physician Assistant Studies
Nova Southeastern University August 2010

Bachelors of Science: Biotechnology
University of Kentucky 2007

Specialty
Family Medicine, Internal Medicine, HIV/STD

Professional History
Howard Brown Health Center - Triad (present)
Northwest Suburban Urologists - Des Plaines, IL. (2010)

Affiliations
American Academy of Physician Assistants - Member
LGBT PA Caucus - Member
Gay and Lesbian Medical Association - Member
Illinois Academy of Physician Assistants - Member

Becky Hickman
Certified Physician Assistant

Education and Training
MS Physician Assistant Studies, Marquette University, June 2010
BS Biomedical Sciences, Marquette University, June 2009

Specialty
Family Practice, Internal Medicine, HIV/STD

Professional History
Certified Physician Assistant, Howard Brown (Sheridan), Presently
Certified Physician Assistant, Belmont Medical Pediatrics

Affiliations
American Academy of Physician Assistants, Member
Gay and Lesbian Medical Association, Member

Nurse Practitioners

Nurse practitioners (NPs) are registered professional nurses who are prepared, through advanced graduate education and clinical training, to provide a wide range of health care services, including the diagnosis and management of common, as well ascomplex, medical conditions to individuals of all ages. Nurse Practitioners are legally authorized to provide comprehensive care management, including prescribing medications.

John Stryker
Certified Nurse Practioner

Education and Training
Michigan State University, East Lansing, MI, June, 1991
Bachelor of Science: Biology and Psychology
University of California, San Francisco, CA, June, 2005
Masters Entry Program in Nursing: MS Critical Care / Trauma
Rush University, Chicago, IL, August, 2009
Post-masters certificate: Family Nurse Practitioner

Specialties
Emergency and Trauma Nursing
Primary Care
HIV/STD

Professional History
Research Associate – AIDS Department, San Francisco Dept of Public Health
ED RN – San Francisco General Hospital, San Francisco, CA
ED RN and Nurse Educator – University of Chicago Medical Center, Chicago, IL
RN – CommunityHealth, Chicago, IL