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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.

DR. RONALD FRED UNZELMAN M.D.
NPI 1437109022
Obstetrics & Gynecology - Gynecology in Santa Rosa, CA

Active since May 12, 2006
1144 SONOMA AVE, SUITE 104, SANTA ROSA, CA 95405(707) 544-8864(707) 544-2723 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Ronald Fred Unzelman M.d. NPPES

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

DR. RONALD FRED UNZELMAN M.D. (NPI 1437109022) is an individual gynecology provider in Santa Rosa, California, licensed in California (A22593) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1437109022
Entity TypeIndividualMale
Primary Taxonomy207VG0400X
Provider Legal NameDR. RONALD FRED UNZELMANCredential: M.D.
Location Address1144 SONOMA AVE, SUITE 104Santa Rosa, CA 95405-4812
Mailing Address1144 Sonoma Ave, Suite 104Santa Rosa, CA 95405-4812 · (707) 544-8864 · Fax (707) 544-2723
Phone(707) 544-8864
Fax(707) 544-2723
Sole ProprietorNo
Enumeration DateMay 12, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1437109022 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207VG0400X
License✔ Licensed in CA · A22593
Definition
A physician who specializes in diagnosis, treatment, and management of patients with gynecologic conditions. Source: National Uniform Claim Committee
1144 SONOMA AVE, Santa Rosa, CA 95405
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Other Providers at the Same Location NPPES 20

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

RAYMOND SEVERT M.D.
Orthopaedic Surgery
1144 SONOMA AVE, SUITE 121
SANTA ROSA, CA 95405
Sonoma County (707) 978-4322
EDWARD A BIERY PHD
Psychologist (Clinical)
1144 SONOMA AVE, STE 104
SANTA ROSA, CA 95405
Sonoma County (707) 595-8680
DR. KEVIN M SATOW M.D.
Physical Medicine & Rehabilitation
1144 SONOMA AVE, SUITE 115
SANTA ROSA, CA 95405
Sonoma County (707) 523-2070
MRS. TINA LOUISE SANDOVAL-DYER MFT
Marriage & Family Therapist
1144 SONOMA AVE, SUITE 117
SANTA ROSA, CA 95405
Sonoma County (707) 526-7720
DR. MARY KILLEEN LYONS PHD, MFT
Marriage & Family Therapist
1144 SONOMA AVE, SUITE 117
SANTA ROSA, CA 95405
Sonoma County (707) 526-7720
CATHRYN ROSS MD
Pediatrics
1144 SONOMA AVE, 113
SANTA ROSA, CA 95405
Sonoma County (707) 545-2082
DR. JOE MADDEN PERSINGER PH.D.
Psychologist (Clinical)
1144 SONOMA AVE, STUITE 117
SANTA ROSA, CA 95405
Sonoma County (707) 526-7720
DR. ALIN NICOLAE CHERA DDS
Dentist
1144 SONOMA AVE, SUITE 105
SANTA ROSA, CA 95405
Sonoma County (707) 542-2676

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 Ronald Unzelman's NPI number?

The NPI number for Ronald Unzelman is 1437109022. It was assigned to this individual provider in the NPPES registry on May 12, 2006.

Where is Ronald Unzelman located?

Ronald Unzelman practices at 1144 Sonoma Ave Suite 104, Santa Rosa, CA 95405. The listed phone number is (707) 544-8864.

What is Ronald Unzelman's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecology, with taxonomy code 207VG0400X.

When was this NPI record last updated?

The NPPES record for Ronald Unzelman 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 25 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.