Ronald Ngayan, MD
NPI 1134302847 · Family Medicine Physician · Cerritos, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ronald Ngayan, MD is a Family Medicine Physician provider in Cerritos, CA (NPI 1134302847).
Provider details
- NPI number
- 1134302847
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 57.013772 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
18 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 84 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 478 | 386 |
| Rosuvastatin Calcium | 284 | 218 |
| Lisinopril | 261 | 216 |
| Metformin Hcl | 243 | 191 |
| Amlodipine Besylate | 232 | 204 |
| Losartan Potassium | 203 | 159 |
| Glipizide | 176 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$86 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-12-17
- Last updated
- 2021-11-29
Frequently asked questions
- What is Ronald Ngayan's NPI number?
- Ronald Ngayan's National Provider Identifier (NPI) is 1134302847, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ronald Ngayan's specialty?
- Ronald Ngayan is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ronald Ngayan located?
- Ronald Ngayan's practice location on file with NPPES is 11514 Wimbley Ct, Cerritos, CA 90703-1761.
- What is Ronald Ngayan's phone number?
- The practice phone number listed in the NPPES registry for Ronald Ngayan is (714) 541-5252.
- Does Ronald Ngayan accept Medicare?
- Ronald Ngayan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ronald Ngayan's NPI active?
- Yes — Ronald Ngayan's NPI (1134302847) is active in the NPPES registry as of the last update on 2021-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.