Welcome to San Dimas Medical Group

100 Old River Road, Bakersfield, CA 93311 | Phone: (661) 663-4800 | Fax: (661) 663–4770

Meet Our Providers

In practice since 1973, San Dimas Medical Group is one of our community's oldest ob/gyn practices,
and is proud to be voted as Kern County's BEST OB/GYN practice.

Dr. Callie Blair, DO
CALLIE BLAIR, DO
  • Medical Education:
    Arizona College of Osteopathic Medicine; 2010
  • Residency:
    Ob/Gyn
    Kern Medical Center; 2012
  • Board Certification:
    Fellow, American Board of Obstetrics & Gynecology; 2016
    Neonatal Resuscitation
  • Languages:
    English
  • In practice since 2012
Dr. Sauhang Patel, MD
SAUHANG PATEL, MD
  • Medical Education:
    American Univ of the Caribbean School of Medicine; 2010
  • Residency:
    Ob/Gyn
    Nassau Univ Medical Center; 2014
  • Board Certification:
    Fellow, American Board of Obstetrics & Gynecology; 2016
  • Languages:
    English, Gujarati
  • In practice since 2014
Dr. Luis Lopez, MD
LUIS LOPEZ, MD
  • Medical Education:
    National Univ of Columbia; 1996
  • Residency:
    Ob/Gyn
    Univ of Puerto Rico
    School of Medicine
    San Juan, Puerto Rico; 2000
  • Board Certification/Fellowship:
    American Board of Obstetrics & Gynecology
  • Languages:
    English, Spanish
  • In practice since 2000
Dr. Gregory Klis, MD
GREGORY KLIS, MD
  • Medical Education:
    Univ of Minnesota Medical School, Minneapolis, Minnesota; 1992
  • Internship:
    Ob/Gyn
    Butterworth Hospital,
    Grand Rapids, Michigan; 1993
  • Residency:
    Ob/Gyn
    Chief Resident
    Butterworth Hospital
    Grand Rapids, Michigan; 1996
  • Languages:
    English
  • In practice since 1996
Dr. Tillai Kannappan, MD
TILLAI KANNAPPAN, MD
  • Medical Education:
    Univ of Madras
    Tamil Nadu, India; 1976
  • Internship:
    Ob/Gyn
    Madras Medical College
    Tamil Nadu, India; 1978
  • Residency:
    Ob/Gyn
    Univ of Southern California
    Los Angeles, CA; 1993
  • Board Certification:
    Fellow, Royal College of Obstetricians & Gynecologists (RCOG)
  • Languages:
    English, Spanish, Tamil, Hindi, Arabic, Telugu, Malayalam
  • In practice since 1993
Dr. Noel Del Mundo, MD
NOEL DEL MUNDO, MD
  • Medical Education:
    Uniformed Services Univ of Health Sciences, Bethesda, MD; 1992
  • Internship:
    Ob/Gyn
    Kern Medical Center
    Bakersfield, CA; 1994
  • Residency:
    Ob/Gyn
    Kern Medical Center
    Bakersfield, CA; 1996
  • Board Certification:
    American Board of Obstetrics & Gynecology
  • Languages:
    English, Spanish
  • In practice since 1996
Dr. Jigisha Upadhyaya, MD
JIGISHA UPADHYAYA, MD
  • Medical Education:
    Univ of Madras
    Tamil Nadu, India; 1976
  • Internships:
    Transitional Internship
    Surat General Hospital
    Surat, India; 1980
    Primary Care/Internal Medicine
    St. Vincent Hospital
    Worchester, Massachusetts, 1990
    Ob/Gyn
    Kern Medical Center
    Bakersfield, CA 1995
  • Residency:
    Ob/Gyn
    Univ of Southern California
    Los Angeles, CA; 1993
  • Board Certification:
    Fellow, American Board of Obstetrics & Gynecology; 2016
  • Languages:
    English, Hindi, Gujarati
  • In practice since 1991
Dr. Jaqueline Williams-Olango, MD
JACQUELINE
WILLIAMS-OLANGO, MD
  • Medical Education:
    Loma Linda Univ of Medicine, Loma Linda, CA; 1998
  • Internships:
    Ob/Gyn
    Franklin Square Hospital Center, Baltimore, MD; 1999
  • Residency:
    Ob/Gyn
    Franklin Square Hospital Center, Baltimore, MD; 2002
  • Fellowship:
    Gynecological Endoscopic
    Advanced Women's Health Institute, Denver, CO; 2003
  • Board Certification/Fellowship:
    American Board of Obstetrics & Gynecology
  • Languages:
    English
  • In practice since 2003
Dr. Marietta Marzan-Tan, MD
MARIETTA
MARZAN-TAN, MD
  • Medical Education:
    Univ. of Santo Tomas,
    Manila, Philippines; 1971
  • Internship:
    Ob/Gyn
    Kern Medical Center
    Bakersfield, CA; 1978
  • Residency:
    Ob/Gyn
    Kern Medical Center
    Bakersfield, CA; 1981
  • In practice since 1981
  • Languages:English, Tagalog
Dr. Wendy Crenshaw, MD
WENDY CRENSHAW, MD
  • Medical Education:
    State University of New York (SUNY), Brooklyn, NY; 1984
  • Residency:
    Ob/Gyn, Interfaith Medical Center, Brooklyn, NY; 1988
  • Languages:
    English
  • In practice since 1988
Dr. James Tsai, MD
JAMES TSAI, MD
  • Medical Education:
    St. George's Univ School of Medicine, Grenada, West Indies; 2000
  • Internship:
    Ob/Gyn
    St. Joseph's Regional Medical Center, Paterson, NJ; 2004
  • Residency:
    Ob/Gyn
    St. Joseph's Regional Medical Center, Paterson, NJ; 2004
  • Board Certification/Fellowship:
    American Board of Obstetrics & Gynecology
  • Languages:
    English, Taiwanese, Mandarin
  • In practice since 2005
Rhonda Colvin, PA-C
RHONDA COLVIN, PA-C
  • Medical Education:
    Chicago, 2010
  • College:
    Univ. of California, San Diego
  • Languages:
    English
  • In practice since 2010
Anne Graham, FNP
ANNE GRAHAM, FNP
  • Medical Education:
    Cal State Bakersfield; 2008
  • College:
    Mount Saint Mary's College
  • Languages:
    English
  • In practice since 2008