Johnny Nguyen Do, M.D.
Internal Medicine Physician · Orange, CA
Johnny Nguyen Do, M.D. is an internal medicine physician with a practice address in Orange, California, and NPI 1235371675, issued on Mar 31, 2009. Check the license (California A107046, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Johnny Nguyen Do
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A107046 CA
MD60335318 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1100 W Stewart Dr, Orange, CA 92868
- Phone
- (714) 771-8000
- Enumerated
- Mar 31, 2009
- Record last updated
- Oct 21, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150918000346); accepts Medicare assignment
- Medical or professional school
- Eastern Virginia Medical School, 2007
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1100 W Stewart Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Allison Alix, WHNPWomen's Health Nurse Practitioner1396269403
- Roger Arakaki, M.D.Anesthesiology Physician1003836990
- Shadi Aramesh, MDPsychiatry Physician1326487091
Verify Johnny Nguyen Do in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A107046Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average internal medicine physician in 2024
512 Medicare Part D claims for 219 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Cefdinir30 claims
- Amoxicillin-Clavulanate Potass23 claims
- Azithromycin23 claims
- Hydrocodone-Acetaminophen19 claims
- Atorvastatin Calcium18 claims
- Carvedilol17 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: $76.24
3 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer 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
- Providence Medical FoundationOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Johnny Nguyen Do among 17,696 internal medicine physician records in California
Johnny Nguyen Do, M.D. 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 2009, is newer than 60% of them.
- NPI issued2009 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2007 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 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).
187 internal medicine physician records list a practice address in Orange
They are 187 of the 13,245 NPPES records with a practice address in Orange, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Orange → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jane Abdelhadi, M.D.Orange, CA 928681124097100
- Edwin Alexander, M.D.Orange, CA 928681659315752
- Romilla Batra, MDOrange, CA 928681871545038
- Ronald Daoud, M.D.Orange, CA 928681093732992
- Nadia Elihu, M.D.Orange, CA 928681659340156
- Roy Herndon, M.D.Orange, CA 928681417928383
- Deepti Pandita, MDOrange, CA 928681255358727
- Maryam Rahimi, MDOrange, CA 928681043268949
Common questions
What is Johnny Nguyen Do, M.D.'s NPI number?
Johnny Nguyen Do, M.D.'s National Provider Identifier (NPI) is 1235371675, issued on Mar 31, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Johnny Nguyen Do, M.D. located?
The NPPES record lists a practice address at 1100 W Stewart Dr, Orange, CA, 92868. Phone: (714) 771-8000. Providers update this record themselves, so call before visiting.
How can I verify Johnny Nguyen Do, M.D.'s license?
NPPES lists California license number A107046, 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 Johnny Nguyen Do, M.D. prescribe under Medicare Part D?
In 2024, Johnny Nguyen Do, M.D. had 512 Medicare Part D claims for 219 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.