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110 years of


We have the know-how you need.

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Our Lab

Bach Diagnostics is a multi-specialty pathology group performing both high complexity clinical pathology and diagnostics surgical pathology. We are 100 percent owned and operated by our physician/pathologist.  Our services cover podiatric pathology, dermatopathology, gastrointestinal pathology, and cytology in addition to advanced molecular genetics testing in molecular microbiology,  pharmacogenetics, and toxicology.


Bach Diagnostics is located in the heart of Orange County, California.   We developed proprietary methodologies that are some of the most accurate and reliable in the nation.   Our advance technologies and methods provide us confidence in our results.  We have also partnered up with some of the biggest diagnostic companies to deliver the best care.  


We are fully licensed and accredited through the Clinical Laboratory Amendents (CLIA) certification.   We adhere to strict proficiency testing through the College of American Pathologists (CAP).   We also adhere to all applicable federal and state laws, rules, and regulations.

Our Laboratory Directors and Pathologists

Dylan Bach MD, MBA

Founder & President

Clinical Pathology Director

Dr. Bach is a board certified Clinical Pathologist and has extensive experience in the clinical laboratory.   He received his Medical Doctorate at University of California San Diego and completed his residency in clinical and anatomical pathology at University of California Irvine.   He went on to complete his clinical fellowship at Johns Hopkins Medical Institutions.   He was the Medical Director of Clinical Chemistry, Pathology Informatics and Toxicology at the University of California Irvine Medical Center.   Dr. Bach is the current clinical pathology director at Bach Diagnostics.  He is well known for his work in clinical pathology and received the Warren L. Bostick Award for Excellence and the John Budd Golden Scope Award. 

Calvin Marantz  MD


Dr. Calvin Marantz, MD is an experienced board certified dermatopathologist.   He has completed residency at Naval Hospital San Diego and in addition has trained with A. Bernard Ackerman MD.   

Our Culture

Bach Diagnostics was founded on the principles of delivering academic level expertise and testing with exceptional service.  At Bach Diagnostics, we pride ourselves in the science and technology we offer.  Our methodologies provide some of the most accurate and reliable results in the nation.  We are committed to giving our providers the best service and strive to go above and beyond their expectations.  

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