Sothy Lun Pheng, MD
Internal Medicine Physician · Fullerton, CA
Sothy Lun Pheng, MD is an internal medicine physician with a practice address in Fullerton, California, and NPI 1083697007, issued on Nov 23, 2005. Check the license (California C132666, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sothy Lun Pheng
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- C132666 CA
220489 MA
Self-reported in NPPES; status is on the state search - Practice location
- 2961 Oakberry CT, Fullerton, CA 92835
- Phone
- (978) 551-8088
- Enumerated
- Nov 23, 2005
- Record last updated
- Sep 9, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicaid ID
- 2086948 MA
- Medicare enrollment
- Enrolled (PECOS I20150424002047); accepts Medicare assignment
- Medical or professional school
- University Of Connecticut School Of Medicine, 2004
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Sothy Lun Pheng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C132666Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average internal medicine physician in 2024
605 Medicare Part D claims for 203 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 26 claims were for opioids.
Most prescribed
- Pantoprazole Sodium40 claims
- Potassium Chloride30 claims
- Cefuroxime28 claims
- Amoxicillin-Clavulanate Potass21 claims
- Furosemide20 claims
- Metoprolol Tartrate20 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: $99.83
5 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, 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 FoundationFullerton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sothy Lun Pheng among 17,696 internal medicine physician records in California
Sothy Lun Pheng, MD 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2004 · median 2004 among the 11,065 with a school on file
- Record last updated2020 · 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).
44 internal medicine physician records list a practice address in Fullerton
They are 44 of the 5,437 NPPES records with a practice address in Fullerton, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Fullerton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Rajiv Bhavsar, M.D.Fullerton, CA 928351477550648
- Bradley Borsari, MDFullerton, CA 928351104826619
- Eugene BostonFullerton, CA 928351023019965
- Ruben Cabral, MDFullerton, CA 928351568458008
- Friedhelm Cordes, M.D.Fullerton, CA 928351588650931
- Robert Francis, M.D.Fullerton, CA 928351366439804
- Leo Garcia, M.D.Fullerton, CA 928351831185792
- Pius Kim, M.D.Fullerton, CA 928351003863317
Common questions
What is Sothy Lun Pheng, MD's NPI number?
Sothy Lun Pheng, MD's National Provider Identifier (NPI) is 1083697007, issued on Nov 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Sothy Lun Pheng, MD located?
The NPPES record lists a practice address at 2961 Oakberry CT, Fullerton, CA, 92835. Phone: (978) 551-8088. Providers update this record themselves, so call before visiting.
How can I verify Sothy Lun Pheng, MD's license?
NPPES lists California license number C132666, 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 Sothy Lun Pheng, MD prescribe under Medicare Part D?
In 2024, Sothy Lun Pheng, MD had 605 Medicare Part D claims for 203 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.