1. Home
  2. Directory
  3. California
  4. San Carlos
  5. Pediatrics
  6. NPI Profile

DR. DEREK Y. OBAYASHI M.D.
NPI 1568659134
Pediatrics - Pediatric Cardiology in San Carlos, CA

Active since September 27, 2007PECOS Enrolled
301 INDUSTRIAL RD, SAN CARLOS, CA 94070(650) 596-4000 Get Directions Write a Review

NPPES record last updated: May 29, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Derek Y. Obayashi M.d. NPPES

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

DR. DEREK Y. OBAYASHI M.D. (NPI 1568659134) is an individual pediatric cardiology provider in San Carlos, California, licensed in California (A90576) and active in the NPI registry since September 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1568659134
Entity TypeIndividualMale
Primary Taxonomy2080P0202X
Provider Legal NameDR. DEREK Y. OBAYASHICredential: M.D.
Location Address301 INDUSTRIAL RDSan Carlos, CA 94070-2603
Mailing Address325 Distel CirLos Altos, CA 94022-1408 · (650) 632-0809
Phone(650) 596-4000
Sole ProprietorNo
Enumeration DateSeptember 27, 2007
Last NPPES UpdateMay 29, 2020
NPPES CertifiedMay 29, 2020
✔ NPI 1568659134 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric CardiologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0202X
Licenses✔ Licensed in CA · A90576✔ Licensed in CT · 050859✔ Licensed in WA · MD60087316
Definition
A pediatric cardiologist provides comprehensive care to patients with cardiovascular problems. This specialist is skilled in selecting, performing and evaluating the structural and functional assessment of the heart and blood vessels, and the clinical evaluation of cardiovascular disease.
301 INDUSTRIAL RD, San Carlos, CA 94070
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Derek Y. Obayashi M.d. 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.

Medicare Billing Reassignment

Medicare enrollment records show Derek Obayashi reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sutter Bay Medical Foundation
7.4 mi
Multi-Specialty
795 EL CAMINO REAL
Palo Alto, CA 94301
  • Reassigned Medicare billing, California enrollment
  • 4,479 clinicians in this Medicare group
NPI 1013950807 (650) 321-4121

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

REBECCA ASHE MD
Internal Medicine
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4000
SARAH CHEYETTE MD
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4000
DR. ANDREA M TOM M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4030
GINELLE SUAREZ MERRILL PTA
Physical Therapy Assistant
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 321-4121
NAVEEN MAHMOOD MD
Pediatrics
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4000
DR. LAUREN KUTZSCHER THOMPSON MD, MS
Pediatrics
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4000
DR. HINA CHAWLA M.D.
Emergency Medicine
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4100
MRS. DIANA TATARKHANOVA NP
Nurse Practitioner (Obstetrics & Gynecology)
301 INDUSTRIAL RD
SAN CARLOS, CA 94070
San Mateo County (650) 596-4240

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 Derek Obayashi's NPI number?

The NPI number for Derek Obayashi is 1568659134. It was assigned to this individual provider in the NPPES registry on September 27, 2007.

Where is Derek Obayashi located?

Derek Obayashi practices at 301 Industrial Rd, San Carlos, CA 94070. The listed phone number is (650) 596-4000.

What is Derek Obayashi's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Cardiology, with taxonomy code 2080P0202X.

Is Derek Obayashi enrolled in Medicare?

Yes. Derek Obayashi is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Derek Obayashi's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Derek Obayashi reassigns Medicare benefits to Sutter Bay Medical Foundation (Palo Alto, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Derek Obayashi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Derek Obayashi was last updated on May 29, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.