Joseph Prinsen, D.O., PH.D.
Internal Medicine Physician · Lodi, CA
Joseph Prinsen, D.O., PH.D. is an internal medicine physician with a practice address in Lodi, California, and NPI 1790135754, issued on Jun 20, 2016. Check the license (California 20A19528, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph Prinsen
- Credential
- D.O., PH.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 20A19528 CA
DO-05466 IA
H90545 MD
5101022490 MI
A-2292-19 NM
and 2 more
Self-reported in NPPES; status is on the state search - Practice location
- 975 S Fairmont Ave, Lodi, CA 95240
- Phone
- (209) 334-3411
- Enumerated
- Jun 20, 2016
- Record last updated
- Dec 5, 2024
- Medicare enrollment
- Enrolled (PECOS I20240911003561); 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 975 S Fairmont Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shefali Awatani, MDInternal Medicine Physician1194860460
- Hamid BahramandNurse Practitioner1760276778
- Jordan Baker, DOEmergency Medicine Physician1356803753
- Elizabeth Bender, NURSE PRACTITIONERNurse Practitioner1619672144
- Elizabeth Bennett, NPFamily Nurse Practitioner1699242065
- Andrew BottlePhysician Assistant1356026132
Verify Joseph Prinsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A19528Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
224 Medicare Part D claims for 68 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 16 claims were for opioids.
Most prescribed
- Levofloxacin17 claims
- Carvedilol15 claims
- Atorvastatin Calcium11 claims
- Olanzapine Odt11 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 2 group practices
- Galen Inpatient Physicians PCLodi, CA
- Vituity-Virginia Hospitalists PCNewport News, VA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joseph Prinsen among 17,696 internal medicine physician records in California
Joseph Prinsen, D.O., PH.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
- Graduated2015 · median 2004 among the 11,065 with a school on file
- Record last updated2024 · 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).
24 internal medicine physician records list a practice address in Lodi
They are 24 of the 964 NPPES records with a practice address in Lodi, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Lodi → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Shefali Awatani, MDLodi, CA 952401194860460
- Corey Colla, MDLodi, CA 952401619934809
- Rod FelberLodi, CA 952401336256965
- Joseph Gayagoy, M.D.Lodi, CA 952401386738458
- Mobin Ghavami, M.D.Lodi, CA 952401447239744
- James Hoff, M.D.Lodi, CA 952401598859654
- Joseph Johnson, MDLodi, CA 952401194906107
- Nanying LiLodi, CA 952401750498309
Common questions
What is Joseph Prinsen, D.O., PH.D.'s NPI number?
Joseph Prinsen, D.O., PH.D.'s National Provider Identifier (NPI) is 1790135754, issued on Jun 20, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Prinsen, D.O., PH.D. located?
The NPPES record lists a practice address at 975 S Fairmont Ave, Lodi, CA, 95240. Phone: (209) 334-3411. Providers update this record themselves, so call before visiting.
How can I verify Joseph Prinsen, D.O., PH.D.'s license?
NPPES lists California license number 20A19528, 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 Joseph Prinsen, D.O., PH.D. prescribe under Medicare Part D?
In 2024, Joseph Prinsen, D.O., PH.D. had 224 Medicare Part D claims for 68 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.