Grace Hoang-Oanh Nguyen, M.D.
Pediatrics Physician · Pomona, CA
Grace Hoang-Oanh Nguyen, M.D. is a pediatrics physician with a practice address in Pomona, California, and NPI 1063771319, issued on May 7, 2012. Check the license (California C175546, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Grace Hoang-Oanh Nguyen
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License numbers
- C175546 CA
74858 GA
Self-reported in NPPES; status is on the state search - Practice location
- 1532 San Bernardino Ave Ste B7, Pomona, CA 91767
- Phone
- (909) 301-4041
- Enumerated
- May 7, 2012
- Record last updated
- Apr 19, 2022
- Fax
- (909) 301-4042
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 1532 San Bernardino Ave Ste B7
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jarnail Gugga, M.D.Internal Medicine Physician1598769846
Verify Grace Hoang-Oanh Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C175546Check 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: $110.42
5 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. 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.
Grace Hoang-Oanh Nguyen among 9,272 pediatrics physician records in California
Grace Hoang-Oanh Nguyen, 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 2012, is newer than 69% of them.
- NPI issued2012 · 69% of these records are older, 27% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2022 · 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 Grace Hoang-Oanh Nguyen, M.D.'s NPI number?
Grace Hoang-Oanh Nguyen, M.D.'s National Provider Identifier (NPI) is 1063771319, issued on May 7, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Grace Hoang-Oanh Nguyen, M.D. located?
The NPPES record lists a practice address at 1532 San Bernardino Ave Ste B7, Pomona, CA, 91767. Phone: (909) 301-4041. Providers update this record themselves, so call before visiting.
How can I verify Grace Hoang-Oanh Nguyen, M.D.'s license?
NPPES lists California license number C175546, 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.