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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

JEFFREY ROBERT NELSON D.O.
NPI 1124099783
Obstetrics & Gynecology - Reproductive Endocrinology in Pasadena, CA

Active since January 31, 2006
333 S ARROYO PKWY, PASADENA, CA 91105(626) 440-9161(626) 585-1603 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Jeffrey Robert Nelson D.o. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JEFFREY ROBERT NELSON D.O. (NPI 1124099783) is an individual reproductive endocrinology provider in Pasadena, California, licensed in California (20A6317) and active in the NPI registry since January 2006.

NPPES Registry Identity

NPI1124099783
Entity TypeIndividualMale
Primary Taxonomy207VE0102X
Provider Legal NameJEFFREY ROBERT NELSONCredential: D.O.
Location Address333 S ARROYO PKWYPasadena, CA 91105-2515
Mailing Address333 S Arroyo PkwyPasadena, CA 91105-2515 · (626) 440-9161 · Fax (626) 585-1603
Phone(626) 440-9161
Fax(626) 585-1603
Sole ProprietorNo
Enumeration DateJanuary 31, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1124099783 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · Reproductive EndocrinologyAllopathic & Osteopathic Physicians
Taxonomy Code207VE0102X
License✔ Licensed in CA · 20A6317
Definition
An obstetrician/gynecologist who is capable of managing complex problems relating to reproductive endocrinology and infertility.
333 S ARROYO PKWY, Pasadena, CA 91105
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Other Identifiers 1

Other20A6317CA · Medical License

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JOHN GORDON WILCOX M.D.
Obstetrics & Gynecology (Reproductive Endocrinology)
333 S ARROYO PKWY
PASADENA, CA 91105
Los Angeles County (626) 440-9161
LIFOVUM FERTILITY MANAGMENT, LLC
Clinic/Center (Ambulatory Surgical)
333 S ARROYO PKWY
PASADENA, CA 91105
Los Angeles County (626) 441-9161
TIFFANY ANTING TSENG N.P.
Nurse Practitioner (Women's Health)
333 S ARROYO PKWY, 3F
PASADENA, CA 91105
Los Angeles County (877) 577-5070
BRADFORD ALAN KOLB M.D.
Obstetrics & Gynecology (Reproductive Endocrinology)
333 S ARROYO PKWY
PASADENA, CA 91105
Los Angeles County (626) 440-9161
HUNTINGTON REPRODUCTIVE CENTER MEDICAL GROUP, A MEDICAL CORPORATION
Clinical Medical Laboratory
333 S ARROYO PKWY
PASADENA, CA 91105
Los Angeles County (626) 440-9161
ARVIN TANEJA MD
Surgery
333 S ARROYO PKWY
PASADENA, CA 91105
Los Angeles County (626) 844-0555
ARVIN TANEJA MD
Surgery
333 S ARROYO PKWY, 201
PASADENA, CA 91105
Los Angeles County (626) 844-0555
HUNTINGTON REPRODUCTIVE CENTER MEDICAL GROUP
Specialist
333 S ARROYO PKWY, 3RD FLR
PASADENA, CA 91105
Los Angeles County (626) 440-9161

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Jeffrey Nelson's NPI number?

The NPI number for Jeffrey Nelson is 1124099783. It was assigned to this individual provider in the NPPES registry on January 31, 2006.

Where is Jeffrey Nelson located?

Jeffrey Nelson practices at 333 S Arroyo Pkwy, Pasadena, CA 91105. The listed phone number is (626) 440-9161.

What is Jeffrey Nelson's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Reproductive Endocrinology, with taxonomy code 207VE0102X.

When was this NPI record last updated?

The NPPES record for Jeffrey Nelson was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.