Ronald Ngayan, MD
Family Medicine Physician · Cerritos, CA
Ronald Ngayan, MD is a family medicine physician with a practice address in Cerritos, California, and NPI 1134302847, issued on Dec 17, 2007. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ronald Ngayan
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 57.013772 OH
Self-reported in NPPES; status is on the state search - Practice location
- 11514 Wimbley CT, Cerritos, CA 90703
- Phone
- (714) 541-5252
- Enumerated
- Dec 17, 2007
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (714) 541-1402
- Medicare enrollment
- Enrolled (PECOS I20120508000166); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify Ronald Ngayan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% more Medicare Part D claims than the average family medicine physician in 2024
5,494 Medicare Part D claims for 2,097 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 160 claims were for opioids.
Most prescribed
- Atorvastatin Calcium478 claims
- Rosuvastatin Calcium284 claims
- Lisinopril261 claims
- Metformin Hcl243 claims
- Amlodipine Besylate232 claims
- Losartan Potassium203 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.
Industry payments in 2024: $85.87
1 payment: food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 55,478 providers of this specialty with any payment received $902.55 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupWhittier, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ronald Ngayan among 17,133 family medicine physician records in California
Ronald Ngayan, MD is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 47% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2005 · median 2005 among the 10,652 with a school on file
- Record last updated2021 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in California
There are 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Cerritos → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Francisco Badar, MDCerritos, CA 907031760667729
- Wednesday Biscocho, M.D.Cerritos, CA 907031528292380
- Emerico Csepanyi, M.D.Cerritos, CA 907031659395036
- Long Dang, M.D.Cerritos, CA 907031043564792
- Ushakumar Gogineni, D.O.Cerritos, CA 907031598897159
- John Keipp, M.D.Cerritos, CA 907031609829415
- Sami Khoury, M.D.Cerritos, CA 907031841246063
- Rosemarie Melchor, MDCerritos, CA 907031982682969
Common questions
What is Ronald Ngayan, MD's NPI number?
Ronald Ngayan, MD's National Provider Identifier (NPI) is 1134302847, issued on Dec 17, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ronald Ngayan, MD located?
The NPPES record lists a practice address at 11514 Wimbley CT, Cerritos, CA, 90703. Phone: (714) 541-5252. Providers update this record themselves, so call before visiting.
How can I verify Ronald Ngayan, MD's license?
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 Ngayan, MD prescribe under Medicare Part D?
In 2024, Ronald Ngayan, MD had 5,494 Medicare Part D claims for 2,097 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.