Who We Are

Yosemite Pathology Medical Group, Inc.

"Our commitment is to provide comprehensive and superior quality anatomic pathology services."

Yosemite Pathology Medical Group, Inc. (YPMG) is a private independent pathologist owned and operated surgical pathology and cytology laboratory based in Modesto, CA. YPMG provides comprehensive state of the art, reliable, and accurate diagnostic services to its physicians and major area hospitals in the Alameda, Amador, Calaveras, Contra Costa, Mariposa, Merced, San Joaquin, Solano, Stanislaus and Tuolumne counties. This personalized diagnostic pathology service, which has been provided for over sixty (60) years, is conducted by nineteen (19) Board Certified pathologists with board certification in the subspecialties of dermatopathology, cytopathology and hematopathology.

YPMG offers a full spectrum of tissue pathology, cytology and histology services, including examination of gynecologic specimens, body fluids and fine needle aspiration specimens. We also offer an extensive array of special stains and immunohistochemistry to assist in the management of oncologic and nononcologic diseases. The laboratory is supported by highly qualified histotechnologists, technicians and office staff who offer excellent service.


YPMG complies with all applicable State and Federal regulations that apply to anatomic pathology and cytology laboratories. YPMG holds a current State of California License, a current CLIA 1988 registration number and is fully accredited by the College of American Pathologist (CAP).

Medicare Provider Number: ZZZ81286Z
Medi-Cal Provider Number: GR0017741 & ZZZ81286Z
State of CA Lab ID Number: CLF 3456
CLIA ID Number: 05D0644036
CAP Laboratory Number: 4602701-01 and 4602701-02
National Provider Identifier: 1598760985