NPPES file of Aug 9, 2026

Michael John Phelan, M.D.

Pediatrics Physician · Hayward, CA

Michael John Phelan, M.D. is a pediatrics physician with a practice address in Hayward, California, and NPI 1376621136, issued on Nov 1, 2006. Check the license (California G73755, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1376621136
Name
Michael John Phelan
Credential
M.D.
Primary taxonomy
Pediatrics Physician 208000000X
License number
G73755 CA
Self-reported in NPPES; status is on the state search
Practice location
27303 Sleepy Hollow Avenue, Hayward, CA 94545
Phone
(510) 454-1000
Enumerated
Nov 1, 2006
Record last updated
May 22, 2015 (not updated in 11 years: call before relying on the address or phone)
Medicaid ID
00G737550 CA
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 pediatrics physician records → All 9,272 in California → Look up another NPI →

Also registered at 27303 Sleepy Hollow Avenue

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

  1. Merula Franzgrote, M.D.Pediatric Adolescent Medicine Physician1164500930
  2. Claudia Heath, PA-CMedical Physician Assistant1275608507
  3. Jenny Hong, RPHPharmacist1700955747
  4. Smita Mohan, M.D.Pediatrics Physician1528036852
  5. Angelica Phelan, M.D.Pediatrics Physician1154409928
  6. Roberto Sinai, M.D.Pediatrics Physician1700826997

Verify Michael John Phelan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G73755    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

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Michael John Phelan among 9,272 pediatrics physician records in California

Michael John Phelan, M.D. is one of 9,272 pediatrics physician records with a practice address in California. 31% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 4% of them.

  • NPI issued2006 · 4% of these records are older, 56% newer
  • In a Medicare fileNo · 31% of these records are
  • In the CMS Doctors and Clinicians fileNo · 8% of these records are
  • Record last updated2015 · 65% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

46 pediatrics physician records list a practice address in Hayward

They are 46 of the 3,993 NPPES records with a practice address in Hayward, and 9,272 pediatrics physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 9,272 in California → Every provider in Hayward → Pediatrics Physician nationwide →

The 8 pediatrics physician records with the nearest ZIP codes

  1. Stacia Cronin, M.D.Hayward, CA 945451215985981
  2. Harry Duh, M.D.Hayward, CA 945451568540318
  3. Carolyn Hudson, M.D.Hayward, CA 945451114954096
  4. Neelesh Kenia, MDHayward, CA 945451942388707
  5. Marcela McNeill, M.D.Hayward, CA 945451659304368
  6. Smita Mohan, M.D.Hayward, CA 945451528036852
  7. Elaine Ong, M.D.Hayward, CA 945451053499806
  8. Lucy Phuong, M.D.Hayward, CA 945451194803940

Common questions

What is Michael John Phelan, M.D.'s NPI number?

Michael John Phelan, M.D.'s National Provider Identifier (NPI) is 1376621136, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Michael John Phelan, M.D. located?

The NPPES record lists a practice address at 27303 Sleepy Hollow Avenue, Hayward, CA, 94545. Phone: (510) 454-1000. Providers update this record themselves, so call before visiting.

How can I verify Michael John Phelan, M.D.'s license?

NPPES lists California license number G73755, 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. 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.