KIMBERLY NICOLE GRELLI MD
NPI 1255758512
Pediatrics - Neonatal-Perinatal Medicine in Walnut Creek, CA

Q: What is Kimberly Grelli's NPI number?

The NPI number for Kimberly Grelli is 1255758512. It was assigned to this individual provider in the NPPES registry on March 25, 2014.

Q: What is Kimberly Grelli's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.

Q: When was this NPI record last updated?

The NPPES record for Kimberly Grelli was last updated on October 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.

Active since March 25, 2014PECOS Enrolled

1601 YGNACIO VALLEY RD, WALNUT CREEK, CA 94598(925) 947-5350(925) 947-5350 Get Directions Write a Review

NPPES record last updated: October 31, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

On this page

About Kimberly Nicole Grelli Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KIMBERLY NICOLE GRELLI MD (NPI 1255758512) is an individual neonatal-perinatal medicine provider in Walnut Creek, California, licensed in California (A147133) and active in the NPI registry since March 2014. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1255758512

Entity TypeIndividualFemale

Primary Taxonomy2080N0001X

Provider Legal NameKIMBERLY NICOLE GRELLICredential: MD

Location Address1601 YGNACIO VALLEY RDWalnut Creek, CA 94598-3122

Mailing Address1601 Ygnacio Valley RdWalnut Creek, CA 94598-3122 · (925) 947-5350

Phone(925) 947-5350

Fax(925) 947-5350

Sole ProprietorNo

Enumeration DateMarch 25, 2014

Last NPPES UpdateOctober 31, 2025

NPPES CertifiedOctober 31, 2025

✔ NPI 1255758512 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Neonatal-Perinatal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code2080N0001X

License✔ Licensed in CA · A147133

Definition

A pediatrician who is the principal care provider for sick newborn infants. Clinical expertise is used for direct patient care and for consulting with obstetrical colleagues to plan for the care of mothers who have high-risk pregnancies.

Also ListedPediatricsTaxonomy 208000000X · License A147133 (CA)

1601 YGNACIO VALLEY RD, Walnut Creek, CA 94598

Open in Google Maps ↗

Secondary Practice Locations 2

Location 1725 Welch RdPalo Alto, CA 94304-1601 · Phone (650) 497-8000

Location 2PO Box 734San Francisco, CA 94104-0734 · Phone (415) 502-8231

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Kimberly Nicole Grelli Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

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.

MALCOLM C JOHNSON MD

Emergency Medicine