Waldo L. Ferrer, MD
Internal Medicine Physician · Antioch, CA
Waldo L. Ferrer, MD is an internal medicine physician with a practice address in Antioch, California, and NPI 1881772978, issued on Nov 2, 2006. Check the license (California A89359, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Waldo L. Ferrer
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A89359 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3400 Delta Fair Blvd, Antioch, CA 94509
- Phone
- (925) 779-5000
- Enumerated
- Nov 2, 2006
- Record last updated
- Nov 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A893590 CA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3400 Delta Fair Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sanaz Aboutalebi-Simon, O.D.Corneal and Contact Management Optometrist1033319215
- Denise Arvay, PT APhysical Therapy Assistant1861560872
- Richard Boise, MDPediatric Adolescent Medicine Physician1255483483
- Maria Borquez, MDPediatric Adolescent Medicine Physician1801974993
- Irina Bronstein, MDInternal Medicine Physician1972681039
- Seema Cameron, MDFamily Medicine Physician1134369465
Verify Waldo L. Ferrer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A89359Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Waldo L. Ferrer among 17,696 internal medicine physician records in California
Waldo L. Ferrer, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
66 internal medicine physician records list a practice address in Antioch
They are 66 of the 2,184 NPPES records with a practice address in Antioch, and 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,696 in California → Every provider in Antioch → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nazish Ali, M.D.Antioch, CA 945091932121498
- Irina Bronstein, MDAntioch, CA 945091972681039
- Anita Cherian, MDAntioch, CA 945091306924402
- Carl Corrigan, MDAntioch, CA 945091285712349
- P. Gunanayagam, MDAntioch, CA 945091811075997
- Dileep Kumar, M.D.Antioch, CA 945091649290206
- Kishore Maskey, MDAntioch, CA 945091568540631
- Nahid Nazminia, MDAntioch, CA 945091831277326
Common questions
What is Waldo L. Ferrer, MD's NPI number?
Waldo L. Ferrer, MD's National Provider Identifier (NPI) is 1881772978, issued on Nov 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Waldo L. Ferrer, MD located?
The NPPES record lists a practice address at 3400 Delta Fair Blvd, Antioch, CA, 94509. Phone: (925) 779-5000. Providers update this record themselves, so call before visiting.
How can I verify Waldo L. Ferrer, MD's license?
NPPES lists California license number A89359, 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.
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.