Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Marimar Contreras Nieves, MD

Individual provider Nephrology Physician · NPI 1245767144

Marimar Contreras Nieves, MD is a Nephrology in Palo Alto, California. Graduated from University of Puerto Rico School of Medicine in 2019, 7 years ago. Practices with Stanford Health Care, a 3,085-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California and Georgia.

Years since qualifying
7
Trained at
University of Puerto Rico School of Medicine
Licensed in
CA, GA
In the registry since
2017
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

795 El Camino Real
Palo Alto, CA 94301-2302
Phone: (650) 853-2917
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 300 Pasteur Dr, Palo Alto, CA 94304-2203 — (650) 723-4000

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 110906 (GA)
Nephrology Physician Taxonomy 207RN0300X · Licence A176891 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A176891 (CA)

Record details

NPI number1245767144
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 23, 2017
Last updated in NPPESApril 15, 2026
Certification dateApril 15, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEPHROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF PUERTO RICO SCHOOL OF MEDICINE
Graduated 2019 (7 years in practice)
Group practice Stanford Health Care — 3085 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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