Deborah Fung, M.D.
Internal Medicine Physician · Riverside, CA
Deborah Fung, M.D. is an internal medicine physician with a practice address in Riverside, California, and NPI 1033572110, issued on Apr 5, 2016. Check the license (California A181968, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Deborah Fung
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A181968 CA
Self-reported in NPPES; status is on the state search - Practice location
- 14305 Meridian Pkwy, Riverside, CA 92518
- Phone
- (866) 984-7483
- Enumerated
- Apr 5, 2016
- Record last updated
- Dec 23, 2025
- Fax
- (951) 529-6371
- Medicare enrollment
- Enrolled (PECOS I20221229002166); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 14305 Meridian Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Evan BasicalInternal Medicine Physician1164165031
- Vinitha Das, MDAllergy & Immunology Physician1811217300
- Malinda Greene, RPHPharmacist1427597988
- Patrick Gutierrez Go, DOFamily Medicine Physician1457931222
- Sue KimFamily Medicine Physician1437739174
- Gilbert Lee, M.D.Family Medicine Physician1740289032
Verify Deborah Fung in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A181968Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% more Medicare Part D claims than the average internal medicine physician in 2024
5,081 Medicare Part D claims for 695 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 104 claims were for opioids.
Most prescribed
- Atorvastatin Calcium567 claims
- Losartan Potassium283 claims
- Amlodipine Besylate245 claims
- Lisinopril207 claims
- Levothyroxine Sodium203 claims
- Metformin Hcl202 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
- Southern California Permanente Medical GroupRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Deborah Fung among 17,696 internal medicine physician records in California
Deborah Fung, 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 2016, is newer than 79% of them.
- NPI issued2016 · 79% of these records are older, 19% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2016 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 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 Riverside
They are 187 of the 13,893 NPPES records with a practice address in Riverside, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Riverside → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Evan BasicalRiverside, CA 925181164165031
- Caleb BondsRiverside, CA 925181649809112
- Jennifer Ngo, DOMarch Air Reserve Base, CA 925181588160253
- Joshua Pengson, M.D.Riverside, CA 925181578925855
- Zhengran Wang, DORiverside, CA 925181205457355
- Javier Barranco-Trabi, MDRiverside, CA 925211154959013
- Nguyen Doan, M.D.Riverside, CA 925211538547302
- Ahmad Saleh, D.O.Riverside, CA 925211356874648
Common questions
What is Deborah Fung, M.D.'s NPI number?
Deborah Fung, M.D.'s National Provider Identifier (NPI) is 1033572110, issued on Apr 5, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Deborah Fung, M.D. located?
The NPPES record lists a practice address at 14305 Meridian Pkwy, Riverside, CA, 92518. Phone: (866) 984-7483. Providers update this record themselves, so call before visiting.
How can I verify Deborah Fung, M.D.'s license?
NPPES lists California license number A181968, 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 Deborah Fung, M.D. prescribe under Medicare Part D?
In 2024, Deborah Fung, M.D. had 5,081 Medicare Part D claims for 695 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.