Donald Lim Ong, MD
Family Medicine Physician · Vista, CA
Donald Lim Ong, MD is a family medicine physician with a practice address in Vista, California, and NPI 1972579910, issued on Feb 28, 2006. Check the license (California G80697, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Donald Lim Ong
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G80697 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 Vale Terrace Dr, Vista, CA 92084
- Phone
- (760) 631-5000
- Enumerated
- Feb 28, 2006
- Record last updated
- Aug 6, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (760) 414-3713
- Medicare enrollment
- Enrolled (PECOS I20050518001011); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1000 Vale Terrace Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Azucena AcostaClinical Social Worker1255937496
- Tonya Adkins, MDObstetrics & Gynecology Physician1285721712
- Autumn AhlersFamily Nurse Practitioner1821007519
- Susan AnderaFamily Nurse Practitioner1790914216
- Iris Arrieta, M.D.Obstetrics & Gynecology Physician1659614303
- Barbara Ascher, CNMAdvanced Practice Midwife1598901993
Verify Donald Lim Ong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G80697Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
26% fewer Medicare Part D claims than the average family medicine physician in 2024
2,629 Medicare Part D claims for 231 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 13 claims were for opioids.
Most prescribed
- Atorvastatin Calcium214 claims
- Lisinopril149 claims
- Levothyroxine Sodium142 claims
- Amlodipine Besylate129 claims
- Metformin Hcl122 claims
- Losartan Potassium93 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.
Bills Medicare through one group practice
- Vista Community ClinicVista, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Donald Lim Ong among 17,133 family medicine physician records in California
Donald Lim Ong, 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1993 · median 2005 among the 10,652 with a school on file
- Record last updated2010 · 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).
75 family medicine physician records list a practice address in Vista
They are 75 of the 2,017 NPPES records with a practice address in Vista, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Vista → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Gershon Bergeisen, M.D.Vista, CA 920841710921093
- Joseph Brown, MDVista, CA 920841508882408
- Marti Donnell, MDVista, CA 920841235151366
- Conrad Hanstein, M.D.Vista, CA 920841972544369
- Ryan Hikes, MDVista, CA 920841609862358
- William Marks, MDVista, CA 920841821023086
- Patricia Merrill-Wilson, D.O.Vista, CA 920841427038926
- Emmett Montis, DOVista, CA 920841811045693
Common questions
What is Donald Lim Ong, MD's NPI number?
Donald Lim Ong, MD's National Provider Identifier (NPI) is 1972579910, issued on Feb 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Donald Lim Ong, MD located?
The NPPES record lists a practice address at 1000 Vale Terrace Dr, Vista, CA, 92084. Phone: (760) 631-5000. Providers update this record themselves, so call before visiting.
How can I verify Donald Lim Ong, MD's license?
NPPES lists California license number G80697, 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 Donald Lim Ong, MD prescribe under Medicare Part D?
In 2024, Donald Lim Ong, MD had 2,629 Medicare Part D claims for 231 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.