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

James R Nellen, MD

Individual provider Anesthesiology Physician · NPI 1174086748

James R Nellen, MD is an Anesthesiology in Greenbrae, California. Qualified in 2019, 7 years ago. Practices with Anesthesiology Consultants of Marin, a 32-clinician group and accepts Medicare assignment. Licensed in California and Wisconsin.

Years since qualifying
7
Licensed in
CA, WI
In the registry since
2019
Specialties on file
3
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

250 Bon Air Rd
Greenbrae, CA 94904-1702
Phone: (415) 925-7100
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence A194708 (CA)
Anesthesiology Physician Taxonomy 207L00000X · Licence 75283 (WI)
Pain Medicine (Anesthesiology) Physician Taxonomy 207LP2900X · Licence 75283 (WI)

Record details

NPI number1174086748
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 10, 2019
Last updated in NPPESJune 10, 2024
Certification dateJune 10, 2024
Mailing addressPo Box 80406, City Of Industry, CA 91716-8400

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 2019 (7 years in practice)
Group practice Anesthesiology Consultants Of Marin — 32 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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