Donald Ong, MD
NPI 1972579910 · Family Medicine Physician · Vista, CA
Enrolled with Medicare as Order and Referring Only - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Donald Ong, MD is a Family Medicine Physician provider in Vista, CA (NPI 1972579910).
Provider details
- NPI number
- 1972579910
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G80697 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 58 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 214 | 76 |
| Lisinopril | 149 | 48 |
| Levothyroxine Sodium | 142 | 42 |
| Amlodipine Besylate | 129 | 49 |
| Metformin Hcl | 122 | 51 |
| Losartan Potassium | 93 | 39 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-28
- Last updated
- 2010-08-06
Frequently asked questions
- What is Donald Ong's NPI number?
- Donald Ong's National Provider Identifier (NPI) is 1972579910, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donald Ong's specialty?
- Donald Ong is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Donald Ong located?
- Donald Ong's practice location on file with NPPES is 1000 Vale Terrace Dr, Vista, CA 92084-5218.
- What is Donald Ong's phone number?
- The practice phone number listed in the NPPES registry for Donald Ong is (760) 631-5000.
- Does Donald Ong accept Medicare?
- Donald Ong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Donald Ong's NPI active?
- Yes — Donald Ong's NPI (1972579910) is active in the NPPES registry as of the last update on 2010-08-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.