MARIMAR CONTRERAS NIEVES MD
NPI 1245767144
Internal Medicine - Nephrology in Palo Alto, CA
About Marimar Contreras Nieves Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARIMAR CONTRERAS NIEVES MD (NPI 1245767144) is an individual nephrology provider in Palo Alto, California, licensed in Georgia (110906) and active in the NPI registry since May 2017. She is enrolled in Medicare PECOS, maintains a secondary practice location in Palo Alto, and is a graduate of University Of Puerto Rico School Of Medicine (2019).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Marimar Contreras Nieves Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94301 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PALO ALTO, CA 94301
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Marimar Contreras Nieves's NPI number?
The NPI number for Marimar Contreras Nieves is 1245767144. It was assigned to this individual provider in the NPPES registry on May 23, 2017.
Where is Marimar Contreras Nieves located?
Marimar Contreras Nieves practices at 795 El Camino Real, Palo Alto, CA 94301. The listed phone number is (650) 853-2917.
What is Marimar Contreras Nieves's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Marimar Contreras Nieves enrolled in Medicare?
Yes. Marimar Contreras Nieves is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
When was this NPI record last updated?
The NPPES record for Marimar Contreras Nieves was last updated on April 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Marimar Contreras Nieves, MD · NPI 1245767144
Nephrology physician in Palo Alto, California. Individual provider, active in the CMS NPPES registry since May 23, 2017.
## Identity
- **NPI:** 1245767144 (Entity type: Individual)
- **Enumerated:** May 23, 2017
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** 110906 (Georgia)
- **Sole proprietor:** No
## Practice location
- **Address:** 795 EL CAMINO REAL, Palo Alto, CA 94301-2302
- **Phone:** (650) 853-2917
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** University Of Puerto Rico School Of Medicine, class of 2019
## Record status
- **NPPES last updated:** April 15, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1245767144) · Data from the CMS NPPES public registry.