Diep Ngoc Dao, D.O.
Internal Medicine Physician · San Diego, CA
Diep Ngoc Dao, D.O. is an internal medicine physician with a practice address in San Diego, California, and NPI 1679916407, issued on Apr 11, 2013. Check the license (California 20A13600, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Diep Ngoc Dao
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A13600 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4077 Fifth Ave # Mer35, San Diego, CA 92103
- Phone
- (858) 232-4778
- Enumerated
- Apr 11, 2013
- Record last updated
- Apr 22, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160525001629); accepts Medicare assignment
- Medical or professional school
- Arizona College Of Osteopathic Medicine Mid Western University, 2013
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 4077 Fifth Ave # Mer35
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Pranay Bonagiri, DOInternal Medicine Physician1104403591
- Jenna Carlson, DOHospitalist Physician1477180172
Verify Diep Ngoc Dao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A13600Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average internal medicine physician in 2024
382 Medicare Part D claims for 122 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium23 claims
- Amoxicillin-Clavulanate Potass17 claims
- Furosemide17 claims
- Pantoprazole Sodium12 claims
- Amlodipine Besylate11 claims
- Carvedilol11 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: $17.84
1 payment: food and beverage; the largest payer was Actelion Pharmaceuticals US, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Scripps Health Inpatient Providers Medical Group IncChula Vista, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Diep Ngoc Dao among 17,696 internal medicine physician records in California
Diep Ngoc Dao, D.O. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 71% of them.
- NPI issued2013 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2013 · median 2004 among the 11,065 with a school on file
- Record last updated2016 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
961 internal medicine physician records list a practice address in San Diego
They are 961 of the 52,937 NPPES records with a practice address in San Diego, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Diego → Internal Medicine Physician nationwide →
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Common questions
What is Diep Ngoc Dao, D.O.'s NPI number?
Diep Ngoc Dao, D.O.'s National Provider Identifier (NPI) is 1679916407, issued on Apr 11, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Diep Ngoc Dao, D.O. located?
The NPPES record lists a practice address at 4077 Fifth Ave # Mer35, San Diego, CA, 92103. Phone: (858) 232-4778. Providers update this record themselves, so call before visiting.
How can I verify Diep Ngoc Dao, D.O.'s license?
NPPES lists California license number 20A13600, 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 Diep Ngoc Dao, D.O. prescribe under Medicare Part D?
In 2024, Diep Ngoc Dao, D.O. had 382 Medicare Part D claims for 122 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.