We Provide Specialized Services

Our goal is to provide you with superior care provided by highly trained specialists. Our board-certified radiologists have completed fellowship training in ultrasound, mammography, and MRI.

All technologists and sonographers are certified and registered. We are accredited by the American College of Radiology. Our facility is a center of excellence for mammography and breast imaging, and our equipment is state of the art.

Emergency appointments are available immediately, and routine appointments are available within 3-5 days.

Mammography Machine

New 3D Mammography

A new technology in the fight against breast cancer, breast tomosynthesis is used with traditional mammography during your annual screening. Read more

New Non-Invasive Prenatal Screening

We are now offering cutting edge prenatal testing that detects multiple fetal chromosome abnormalities with a single maternal blood test. Read more

Prepare for your visit

A mammogram is a low-dose X-ray of the breast, used to screen for abnormal changes in breast tissue, including cancer. Read more

We Accept Your Insurance

We are now accepting the following insurance providers:

Aetna: PPO/POS
Blue Cross: PPO/EPO
Blue Shield: PPO/EPO/Direct HMO (San Mateo BSC)
Blue Card Program (out of state plans)
CareAdvantage Plan
Cigna/Medsolution: PPO/POS/Open Access Plus/ Direct HMO
Hill Physician Medical Group: HMO
Health Plan of San Mateo
Medicare Part B
Tricare for life/Tricare West Region
United Healthcare: PPO/Choice Plus

Workers Comp:
Majority of workers comp. insurances are accepted as long as they are authorized to Peninsula Diagnostic Imaging. We do not accept the Department of Labor.

Please contact us if you are looking for cash paying prices.

What People Are Saying

Super friendly technicians

I get my yearly mammograms done here and have nothing but good things to say about it. Super  friendly technicians, what more do you want?


Professional & caring staff

Professional & caring staff — Annette (technician) and Dr. Susan Marks in particular are really great.

J S., San Francisco, CA

Convenient for the patient

A great place for doctors to refer.  I refer all my patients there for their MRI’s because it is convenient for the patient and their images they produce are fabulous.  Dr. Hughes.

PH., San Mateo, CA

Very thorough and professional

They are very thorough and professional with regard to all of my ultrasound services.  I have been using them for over 20 years.

RB., Palo Alto, CA

Cannot ask for better service

Staff was super friendly, wait line was very short (I was there early in the morning). and Dr. Beth took care of us, explained everything, answered all our questions, and told us what to expect.. cannot ask for better service.

LA., San Mateo, CA

A top-class facility

I just had an MRI of my knee yesterday. This is a top-class facility with excellent customer service. A special shout out to Rhonda, my technician. I have used this facility before and will do so for any MRI needed.

ER., San Mateo, CA

Click here to read more testimonials…

Welcome To Our Office

Hours of Operation

Monday – Friday

7:30 am to 5:30 pm

Click here for directions

Office Address:

101 S. San Mateo Drive, Suite 201, San Mateo, CA 94401
Phone: 1.650.343.1655, Fax: 650-343-1686

Garage Address:

Entrance to underground parking lot located at
100 South Ellsworth, San Mateo, CA 94401