Nicholas James Protopsaltis, MD, PHD
Clinical Pathology/Laboratory Medicine Physician · San Diego, CA
Nicholas James Protopsaltis, MD, PHD is a clinical pathology/laboratory medicine physician with a practice address in San Diego, California, and NPI 1275160632, issued on Mar 25, 2020. Check the license (California A182801, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nicholas James Protopsaltis
- Credential
- MD, PHD
- Primary taxonomy
- Clinical Pathology/Laboratory Medicine Physician 207ZP0105X
- License number
- A182801 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 W Arbor Dr, San Diego, CA 92103
- Phone
- (800) 926-8273
- Enumerated
- Mar 25, 2020
- Record last updated
- Jan 27, 2025
- Fax
- (888) 539-8781
- Medicare enrollment
- Enrolled (PECOS I20250131002515); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 2020
- Entity
- Type 1 · individual
8 nearest clinical pathology/laboratory medicine physician records → All 131 in California → Look up another NPI →
Also registered at 200 W Arbor Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alison A'Court, MDAnesthesiology Physician1912218199
- Benjamin Abbadessa, M.D.Colon & Rectal Surgery Physician1255593612
- Geraldine Abcede, RNCertified Registered Nurse Anesthetist1982384046
- Joseph Abdelmalek, M.DNephrology Physician1740485531
- Kristy AbelCertified Registered Nurse Anesthetist1962113035
- Paula Abeleda, NPFamily Nurse Practitioner1558945022
Verify Nicholas James Protopsaltis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A182801Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Regents OF The University OF CaliforniaSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nicholas James Protopsaltis among 131 clinical pathology/laboratory medicine physician records in California
Nicholas James Protopsaltis, MD, PHD is one of 131 clinical pathology/laboratory medicine physician records with a practice address in California. 36% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 85% of them.
- NPI issued2020 · 85% of these records are older, 11% newer
- In a Medicare fileYes · 36% of these records are
- In the CMS Doctors and Clinicians fileYes · 31% of these records are
- Graduated2020 · median 1998 among the 40 with a school on file
- Record last updated2025 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0105X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Clinical Pathology/Laboratory Medicine Physician providers in California
There are 131 clinical pathology/laboratory medicine physician records in California.
All 131 in California → Every provider in San Diego → Clinical Pathology/Laboratory Medicine Physician nationwide →
The 8 clinical pathology/laboratory medicine physician records with the nearest ZIP codes
- Laura Dilly, M.D.San Diego, CA 921031942561212
- Oluwole Fadare, M.D.San Diego, CA 921031619955804
- Michael Kelner, M.D.San Diego, CA 921031174679849
- Thomas Lane, M.D.San Diego, CA 921031649224395
- Dzung Le, M.D.San Diego, CA 921031770526931
- Saravanan Raju, MDSan Diego, CA 921031679199111
- John Thorson, MD, PHDSan Diego, CA 921031225120454
- Jack Bui, M.D., PH.D.La Jolla, CA 920931942529821
Common questions
What is Nicholas James Protopsaltis, MD, PHD's NPI number?
Nicholas James Protopsaltis, MD, PHD's National Provider Identifier (NPI) is 1275160632, issued on Mar 25, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Nicholas James Protopsaltis, MD, PHD located?
The NPPES record lists a practice address at 200 W Arbor Dr, San Diego, CA, 92103. Phone: (800) 926-8273. Providers update this record themselves, so call before visiting.
How can I verify Nicholas James Protopsaltis, MD, PHD's license?
NPPES lists California license number A182801, 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.
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.