Diep D. Nguyen, DO
Endocrinology, Diabetes & Metabolism Physician · Allentown, PA
Diep D. Nguyen, DO is an endocrinology, diabetes & metabolism physician with a practice address in Allentown, Pennsylvania, and NPI 1417140468, issued on Aug 23, 2007. Check the license (Pennsylvania OS015018, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Diep D. Nguyen
- Credential
- DO
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- OS015018 PA
Self-reported in NPPES; status is on the state search - Practice location
- 3435 Winchester RD, Allentown, PA 18104
- Phone
- (610) 861-8080
- Enumerated
- Aug 23, 2007
- Record last updated
- Mar 7, 2023
- Medicare enrollment
- Enrolled (PECOS I20100824000225); may accept Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2006
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 485 in Pennsylvania → Look up another NPI →
Also registered at 3435 Winchester RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sunshine Fachet, MS OTR/LOccupational Therapist1487935128
- Andrew Hill, CRNP, FNP-CFamily Nurse Practitioner1881322576
- Sharin Kelley, CRNPGerontology Nurse Practitioner1356854988
Verify Diep D. Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS015018Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
4,358 Medicare Part D claims for 452 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 42% of claims.
Most prescribed
- Levothyroxine Sodium620 claims
- Metformin Hcl Er243 claims
- Rosuvastatin Calcium168 claims
- Ozempic152 claims
- Glipizide Er145 claims
- Lantus Solostar135 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.
Diep D. Nguyen among 485 endocrinology, diabetes & metabolism physician records in Pennsylvania
Diep D. Nguyen, DO is one of 485 endocrinology, diabetes & metabolism physician records with a practice address in Pennsylvania. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 45% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2006 · median 2004 among the 334 with a school on file
- Record last updated2023 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Pennsylvania
There are 485 endocrinology, diabetes & metabolism physician records in Pennsylvania.
All 485 in Pennsylvania → Every provider in Allentown → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Aakif Ahmad, DOAllentown, PA 181031720308331
- Anne BorjaAllentown, PA 181031891144424
- Lindor Gelin, DOAllentown, PA 181031255953584
- Clarissa Hayes, DOAllentown, PA 181031306410568
- Sharmila Koshy, MDAllentown, PA 181031609037696
- Rebecca LopesAllentown, PA 181031750949327
- Angela Magdaleno, D.O.Allentown, PA 181031720475189
- Ramya Punati, M.D.Allentown, PA 181031962821876
Common questions
What is Diep D. Nguyen, DO's NPI number?
Diep D. Nguyen, DO's National Provider Identifier (NPI) is 1417140468, issued on Aug 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Diep D. Nguyen, DO located?
The NPPES record lists a practice address at 3435 Winchester RD, Allentown, PA, 18104. Phone: (610) 861-8080. Providers update this record themselves, so call before visiting.
How can I verify Diep D. Nguyen, DO's license?
NPPES lists Pennsylvania license number OS015018, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Diep D. Nguyen, DO prescribe under Medicare Part D?
In 2024, Diep D. Nguyen, DO had 4,358 Medicare Part D claims for 452 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.