Dr. Ronald Ngayan, MD
- Part D claims, 2024
- 5,494
- Industry payments
- $324
- Affiliated sites
- 3
- Medical group
- 1
- Insurance carriers
- 5
- Practice address
- 9400 Rosecrans Avenue, Bellflower, CA 90706
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD
Acute Care Hospital outpatient department · Bellflower, California
Find Dr. Ngayan's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Ronald Ngayan is a family medicine physician in Bellflower, California
Dr. Ngayan practices at Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California.
Dr. Ngayan's NPI, 1134302847, was assigned on December 17, 2007. Dr. Ngayan graduated from American University of the Caribbean School of Medicine in 2005. Dr. Ngayan's Ohio license number on file is 57.013772.
- NPI
- 1134302847NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9638331739
- NPI enumeration date
- December 17, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ronald Ngayan practices at Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California
Dr. Ngayan's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD, at 9400 Rosecrans Avenue, Bellflower, CA 90706.
- Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD9400 Rosecrans Avenue, Bellflower, CA 90706
Source: Dmand AI Affiliation Data
Dr. Ronald Ngayan is affiliated with 3 sites of care and 1 medical group
Dr. Ngayan's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Ngayan to 1 more breast imaging center and 1 group practice or clinic, each named with a free account. Dr. Ngayan's employer is on file too: a hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Ronald Ngayan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ngayan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ronald Ngayan is one of 15,680 family medicine physicians in California
Family medicine is Dr. Ngayan's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Ngayan is board certified in family medicine by the American Board of Family Medicine. Dmand AI has Dr. Ngayan's licenses on file in 2 states: Ohio and California.
Specialties and state licenses
- Family medicine, OhioPrimary
- California license
Clinical focus
Dmand AI lists chronic hypertension, enlarged prostate, rash and thoracic spine disorders among the conditions Dr. Ngayan treats.
Family medicine physicians near Dr. Ngayan
Counts of family medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Ronald Ngayan's patients have a median age of 57
Across all payers, Dmand AI patient panel data puts Dr. Ngayan's median patient age at 57, with 55% women.
Dr. Ngayan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women55%
- Men44%
Source: Dmand AI Patient Panel Data
Dr. Ronald Ngayan wrote 5,494 Medicare Part D claims in 2024
In 2024, Dr. Ngayan wrote 5,494 Medicare Part D claims for 2,097 patients. 89% of them were for generic drugs. CMS names the drug for 4,911 of them, across 82 drugs with 11 or more claims each, at $182,475 in total drug cost. In 2023, CMS named 5,250 claims across 83 drugs.
Dr. Ngayan's Part D claims by kind of drug, 2024
- Generic4,875 claims89%
- Brand-name533 claims10%
- Other86 claims2%
Dr. Ngayan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Ngayan's Part D claims, 2024
- Opioids3%160 of 5,494 claims
- Antibiotics2%95 of 5,494 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5,2502024: 4,9116%
Drugs named by CMS: 82 in 2024, 83 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Ronald Ngayan offers telehealth to Medicare patients
Dr. Ngayan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ngayan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ronald Ngayan received $324 in industry payments from 2016 to 2024
CMS Open Payments shows 3 general payments to Dr. Ngayan from 2 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Bayer HealthCare Pharmaceuticals Inc. paid the most, $221.
General payments to Dr. Ngayan by program year, 2016 to 2024
Companies that paid Dr. Ngayan the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ronald Ngayan graduated from American University of the Caribbean School of Medicine
Dr. Ngayan graduated from American University of the Caribbean School of Medicine in 2005.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Ronald Ngayan accepts plans from 5 insurance carriers
Dr. Ngayan is in network with 5 carriers, including Elevance, Kaiser Permanente and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
- Elevance
- Kaiser Permanente
- Blue Cross Blue Shield of Massachusetts
- HCSC
- CMS Medicare
Plan types Dr. Ngayan accepts, by number of carriers
- Medicare4
- PPO3
- HMO2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Ronald Ngayan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Ronald Ngayan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Ronald Ngayan's NPI number?
Dr. Ronald Ngayan's NPI number is 1134302847. It was assigned on December 17, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Ronald Ngayan?
Dr. Ronald Ngayan is a family medicine physician in Bellflower, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Ronald Ngayan practice?
Dr. Ngayan practices at 9400 Rosecrans Avenue, Bellflower, CA 90706. Dr. Ngayan's primary practice is Kaiser Permanente Medical Group Bellflower Medical Offices - HOPD in Bellflower, California. Dmand AI also links Dr. Ngayan to 1 breast imaging center and 1 group practice or clinic.
What is Dr. Ronald Ngayan's medical license number?
Dr. Ngayan's Ohio license number on file is 57.013772, one of the licenses on file in 2 states.
Which states has Dr. Ronald Ngayan been licensed in?
Dmand AI has state licenses on file for Dr. Ngayan in Ohio (2007 to 2010) and California (2009 to 2027).
What medical group is Dr. Ronald Ngayan part of?
Dr. Ngayan is linked to Southern California Permanente Medical Group.
Does Dr. Ronald Ngayan accept Medicare?
Yes. CMS lists Dr. Ngayan as accepting Medicare assignment.
Does Dr. Ronald Ngayan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ngayan as offering telehealth services.
Is Dr. Ronald Ngayan board certified?
Yes. Dr. Ngayan is board certified in family medicine by the American Board of Family Medicine.
Where did Dr. Ronald Ngayan go to medical school?
Dr. Ngayan graduated from American University of the Caribbean School of Medicine in 2005.
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What drugs does Dr. Ronald Ngayan prescribe most?
In 2024 Medicare Part D data, Dr. Ngayan's most prescribed drugs by claims were Atorvastatin Calcium, Rosuvastatin Calcium and Lisinopril.
Has Dr. Ronald Ngayan received payments from drug or device companies?
CMS Open Payments shows $324 in general payments to Dr. Ngayan from 2 companies from 2016 to 2024. The largest total came from Bayer HealthCare Pharmaceuticals Inc.
How long has Dr. Ronald Ngayan been practicing?
Dr. Ngayan graduated from medical school in 2005, 21 years ago.
What insurance does Dr. Ronald Ngayan accept?
Dr. Ngayan is in network with 5 carriers, including Elevance, Kaiser Permanente and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
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