Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Derek L Passer, MD

Individual provider Anesthesiology Physician · NPI 1174055693

Derek L Passer, MD practises Anesthesiology in San Diego, California. Graduated from University of Nebraska College of Medicine in 2017, 9 years ago. Practices with Aspirus Rhinelander and Tomahawk Hospitals and Clinics, Inc, a 554-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California, Colorado, Washington and Wisconsin.

Years since qualifying
9
Trained at
University of Nebraska College of Medicine
Licensed in
CA, CO, WA, WI
In the registry since
2017
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3626 Ruffin Rd
San Diego, CA 92123-1810
Phone: (858) 565-9666
Fax: (858) 565-9441
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 1717 S J St, Tacoma, WA 98405-4933 — (253) 985-6403
  • 2116 Craig Rd, Eau Claire, WI 54701-6118 — (715) 858-4610

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence A182607 (CA)
Anesthesiology Physician Taxonomy 207L00000X · Licence MD61505577 (WA)
Anesthesiology Physician Taxonomy 207L00000X · Licence 101829 (WI)
Anesthesiology Physician Taxonomy 207L00000X · Licence DR.0065803 (CO)

Record details

NPI number1174055693
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 3, 2017
Last updated in NPPESOctober 15, 2024
Certification dateOctober 15, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Medical schoolUNIVERSITY OF NEBRASKA COLLEGE OF MEDICINE
Graduated 2017 (9 years in practice)
Group practice Aspirus Rhinelander And Tomahawk Hospitals And Clinics, Inc. — 554 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients168
Services billed 187 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $42 2 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Aspirus Rhinelander and Tomahawk Hospitals and Clinics, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 554 clinicians in the practice; 12 are shown here.

Other providers in San Diego