James T. Warren, M.D.
Pediatrics Physician · Pomona, CA
James T. Warren, M.D. is a pediatrics physician with a practice address in Pomona, California, and NPI 1003887993, issued on Jan 30, 2006. Check the license (California A74956, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James T. Warren
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- A74956 CA
Self-reported in NPPES; status is on the state search - Practice location
- 250 W Bonita Ave, Pomona, CA 91767
- Phone
- (909) 629-5067
- Enumerated
- Jan 30, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (909) 865-7688
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 250 W Bonita Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Pramila Agrawal, M.D.Pediatrics Physician1528039500
- Lindsey Davison, CNM, WHNPWomen's Health Nurse Practitioner1962839357
- Jagtar Dhadwal, MDInternal Medicine Physician1801865563
- Kent Fung, MDPediatrics Physician1689844318
- Sandra Hollenberg, M.D.Pediatrics Physician1457322430
- Carrie Knoll, M.D.Pediatrics Physician1255302238
Verify James T. Warren in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A74956Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $26.86
1 payment: food and beverage; the largest payer was GlaxoSmithKline, LLC. The 21,580 providers of this specialty with any payment received $842.05 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
James T. Warren among 9,272 pediatrics physician records in California
James T. Warren, 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. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 56% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2023 · 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).
Pediatrics Physician providers in California
There are 9,272 pediatrics physician records in California.
All 9,272 in California → Every provider in Pomona → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Pramila Agrawal, M.D.Pomona, CA 917671528039500
- Kent Fung, MDPomona, CA 917671689844318
- Narsis Golkarieh, MDPomona, CA 917671598865388
- Jody Hitchman, NPPomona, CA 917671467655100
- Sandra Hollenberg, M.D.Pomona, CA 917671457322430
- Ericka Hong, M.D.Pomona, CA 917671164494761
- Ching Chih Huang, MDPomona, CA 917671285776187
- Carrie Knoll, M.D.Pomona, CA 917671255302238
Common questions
What is James T. Warren, M.D.'s NPI number?
James T. Warren, M.D.'s National Provider Identifier (NPI) is 1003887993, issued on Jan 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James T. Warren, M.D. located?
The NPPES record lists a practice address at 250 W Bonita Ave, Pomona, CA, 91767. Phone: (909) 629-5067. Providers update this record themselves, so call before visiting.
How can I verify James T. Warren, M.D.'s license?
NPPES lists California license number A74956, 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.
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.