NPPES file of Aug 9, 2026

Derek Y. Obayashi, M.D.

Pediatric Cardiology Physician · San Carlos, CA

Derek Y. Obayashi, M.D. is a pediatric cardiology physician with a practice address in San Carlos, California, and NPI 1568659134, issued on Sep 27, 2007. Check the license (California A90576, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1568659134
Name
Derek Y. Obayashi
Credential
M.D.
Primary taxonomy
Pediatric Cardiology Physician 2080P0202X
License numbers
A90576 CA
050859 CT
MD60087316 WA
Self-reported in NPPES; status is on the state search
Practice location
301 Industrial RD, San Carlos, CA 94070
Phone
(650) 596-4000
Enumerated
Sep 27, 2007
Record last updated
May 29, 2020 (not updated in 6 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest pediatric cardiology physician records → All 363 in California → Look up another NPI →

Also registered at 301 Industrial RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Maria Katrina Abad, AGPCNP-BCNurse Practitioner1306394952
  2. Maryam Adeel, M.D.Family Medicine Physician1285163998
  3. Jennifer Akazawa, MDFamily Medicine Physician1457971772
  4. Sarah Alamillo, PA-CPhysician Assistant1306349352
  5. Judith Alderman, N.P.Nurse Practitioner1407225121
  6. Omar Aljundi, NPNurse Practitioner1811464811

Verify Derek Y. Obayashi in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A90576    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Industry payments in 2024: $30.64

1 payment: food and beverage; the largest payer was Corium, LLC. The 1,156 providers of this specialty with any payment received $2,864.57 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Derek Obayashi$30.64
  2. Specialty average$2,864.57

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Derek Y. Obayashi among 363 pediatric cardiology physician records in California

Derek Y. Obayashi, M.D. is one of 363 pediatric cardiology physician records with a practice address in California. 59% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 43% of them.

  • NPI issued2007 · 43% of these records are older, 48% newer
  • In a Medicare fileYes · 59% of these records are
  • In the CMS Doctors and Clinicians fileNo · 45% of these records are
  • Record last updated2020 · 50% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pediatric Cardiology Physician providers in California

There are 363 pediatric cardiology physician records in California.

All 363 in California → Every provider in San Carlos → Pediatric Cardiology Physician nationwide →

The 8 pediatric cardiology physician records with the nearest ZIP codes

  1. Michael Brook, M.D.San Francisco, CA 941101467488262
  2. Luis Larrazabal Martinez, MDSan Francisco, CA 941101316252893
  3. Michael Tyndall, MDSan Francisco, CA 941151881772499
  4. Ellen Chan, M.D.San Francisco, CA 941181093958555
  5. Nikola Tede, M.D.San Francisco, CA 941181932127610
  6. Ian Adatia, MB CHBSan Francisco, CA 941431427085299
  7. Mark Cocalis, M.D.San Francisco, CA 941431700817913
  8. Jeffrey Gossett, M.D.San Francisco, CA 941431780790378

Common questions

What is Derek Y. Obayashi, M.D.'s NPI number?

Derek Y. Obayashi, M.D.'s National Provider Identifier (NPI) is 1568659134, issued on Sep 27, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Derek Y. Obayashi, M.D. located?

The NPPES record lists a practice address at 301 Industrial RD, San Carlos, CA, 94070. Phone: (650) 596-4000. Providers update this record themselves, so call before visiting.

How can I verify Derek Y. Obayashi, M.D.'s license?

NPPES lists California license number A90576, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.