Ronald August Chez, MD
Maternal & Fetal Medicine Physician · Orange, CA
Ronald August Chez, MD is a maternal & fetal medicine physician with a practice address in Orange, California, and NPI 1457683195, issued on Feb 5, 2010. Check the license (California GFE4996, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ronald August Chez
- Credential
- MD
- Primary taxonomy
- Maternal & Fetal Medicine Physician 207VM0101X
- License number
- GFE4996 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6150 E West View Dr, Orange, CA 92869
- Phone
- (714) 628-9464
- Enumerated
- Feb 5, 2010
- Record last updated
- Feb 5, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (714) 628-9464
- Entity
- Type 1 · individual
8 nearest maternal & fetal medicine physician records → All 343 in California → Look up another NPI →
Verify Ronald August Chez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license GFE4996Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% fewer Medicare Part D claims than the average maternal & fetal medicine physician in 2024
24 Medicare Part D claims, against an average of 41 among the 353 providers of this specialty who prescribed in Part D. Brand-name drugs were 50% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Ronald August Chez among 343 maternal & fetal medicine physician records in California
Ronald August Chez, MD is one of 343 maternal & fetal medicine physician records with a practice address in California. 61% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 73% of them.
- NPI issued2010 · 73% of these records are older, 24% newer
- In a Medicare fileYes · 61% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2010 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VM0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Maternal & Fetal Medicine Physician providers in California
There are 343 maternal & fetal medicine physician records in California.
All 343 in California → Every provider in Orange → Maternal & Fetal Medicine Physician nationwide →
The 8 maternal & fetal medicine physician records with the nearest ZIP codes
- Epifanio Anzaldo, M.D.Orange, CA 928681962508630
- Dana BergerOrange, CA 928681497287387
- Julia Bregand-White, M.D.Orange, CA 928681750600961
- Cindy Chau, MDOrange, CA 928681699080598
- Esther Friedrich, M.D.Orange, CA 928681972523579
- Thomas Garite, M.D.Orange, CA 928681760505945
- Afshan B Hameed, MDOrange, CA 928681992885040
- Tamera Hatfield, MD, PHDOrange, CA 928681033390331
Common questions
What is Ronald August Chez, MD's NPI number?
Ronald August Chez, MD's National Provider Identifier (NPI) is 1457683195, issued on Feb 5, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Ronald August Chez, MD located?
The NPPES record lists a practice address at 6150 E West View Dr, Orange, CA, 92869. Phone: (714) 628-9464. Providers update this record themselves, so call before visiting.
How can I verify Ronald August Chez, MD's license?
NPPES lists California license number GFE4996, 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.
How much does Ronald August Chez, MD prescribe under Medicare Part D?
In 2024, Ronald August Chez, MD had 24 Medicare Part D claims; the average among maternal & fetal medicine physician prescribers was 41. Part D covers Medicare prescriptions only.
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.