NPPES file of Aug 9, 2026

William Pfisterer, M.D.

Diagnostic Radiology Physician · Covina, CA

William Pfisterer, M.D. is a diagnostic radiology physician with a practice address in Covina, California, and NPI 1003888991, issued on Feb 3, 2006. Check the license (California G27764, 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
1003888991
Name
William Pfisterer
Credential
M.D.
Primary taxonomy
Diagnostic Radiology Physician 2085R0202X
License number
G27764 CA
Self-reported in NPPES; status is on the state search
Practice location
414 E San Bernardino RD, Covina, CA 91723
Phone
(626) 915-5181
Enumerated
Feb 3, 2006
Record last updated
Oct 23, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax
(626) 331-2313
Medicaid ID
00G277640 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 diagnostic radiology physician records → All 4,500 in California → Look up another NPI →

Also registered at 414 E San Bernardino RD

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

  1. Natalie AdamsSpeech-Language Assistant1447936059
  2. Melanie AlcalaSpeech-Language Pathologist1932884715
  3. Brian Apin, PTPediatric Physical Therapist1861447294
  4. Alejandra ArenasOccupational Therapist1043193105
  5. Marissa Ayala, OTR/LOccupational Therapist1427672153
  6. Shannon BallesterosSpeech-Language Assistant1699407445

Verify William Pfisterer in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G27764    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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William Pfisterer among 4,500 diagnostic radiology physician records in California

William Pfisterer, M.D. is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% 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 7% of them.

  • NPI issued2006 · 7% of these records are older, 52% newer
  • In a Medicare fileNo · 74% of these records are
  • In the CMS Doctors and Clinicians fileNo · 70% of these records are
  • Record last updated2008 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Diagnostic Radiology Physician providers in California

There are 4,500 diagnostic radiology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 4,500 in California → Every provider in Covina → Diagnostic Radiology Physician nationwide →

The 8 diagnostic radiology physician records with the nearest ZIP codes

  1. Ghada Assassa-Solh, M.DCovina, CA 917231457313017
  2. Michael ChristieCovina, CA 917231447813134
  3. Michael Grossman, M.D.Covina, CA 917231790713519
  4. Ilyas Khan, M.D.Covina, CA 917231568434124
  5. Jaime Schvartzman, M.DCovina, CA 917231851363741
  6. David Underwood, M.DCovina, CA 917231023080686
  7. Jae Yoon, M.DCovina, CA 917231952373508
  8. Joel Block, MDRancho Cucamongo, CA 917301225098189

Common questions

What is William Pfisterer, M.D.'s NPI number?

William Pfisterer, M.D.'s National Provider Identifier (NPI) is 1003888991, issued on Feb 3, 2006. An NPI identifies a provider in billing; it is not a license.

Where is William Pfisterer, M.D. located?

The NPPES record lists a practice address at 414 E San Bernardino RD, Covina, CA, 91723. Phone: (626) 915-5181. Providers update this record themselves, so call before visiting.

How can I verify William Pfisterer, M.D.'s license?

NPPES lists California license number G27764, 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.