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THOMAS C GUYN MD
NPI 1265596191
Internal Medicine in Santa Rosa, CA

Active since December 22, 2006
3536 MENDOCINO AVE, STE 300, SANTA ROSA, CA 95403(707) 546-2180(707) 546-2188 Get Directions Write a Review

NPPES record last updated: August 11, 2014. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Thomas C Guyn Md NPPES

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

THOMAS C GUYN MD (NPI 1265596191) is an individual internal medicine provider in Santa Rosa, California, licensed in California (A42640) and active in the NPI registry since December 2006.

NPPES Registry Identity

NPI1265596191
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameTHOMAS C GUYNCredential: MD
Location Address3536 MENDOCINO AVE, STE 300Santa Rosa, CA 95403-3634
Mailing Address3536 Mendocino Ave, Ste 200Santa Rosa, CA 95403-3634 · (707) 546-2180 · Fax (707) 546-2188
Phone(707) 546-2180
Fax(707) 546-2188
Sole ProprietorNo
Enumeration DateDecember 22, 2006
Last NPPES UpdateAugust 11, 2014
✔ NPI 1265596191 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A42640
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
3536 MENDOCINO AVE, Santa Rosa, CA 95403
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Other Identifiers 5

Other1012487Preferred One
Other596132American Ppo
Other507T7GUBlue Cross Blue Shield
OtherP01315573CA · Rr Medicare
Medicare UPINC04011

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.

DR. RANOLPH DUANE RUSH DDS
Dentist (Endodontics)
3536 MENDOCINO AVE, SUITE #330
SANTA ROSA, CA 95403
Sonoma County (707) 545-4104
SHALINI YALAMANCHI MD
Ophthalmology
3536 MENDOCINO AVE, STE. 380
SANTA ROSA, CA 95403
Sonoma County (707) 523-7726
PARUL KOHLI M.D.
Internal Medicine
3536 MENDOCINO AVE, STE 300
SANTA ROSA, CA 95403
Sonoma County (707) 546-2180
DEBORAH ANN MAGEE NP
Nurse Practitioner (Family)
3536 MENDOCINO AVE, SUITE 200
SANTA ROSA, CA 95403
Sonoma County (707) 573-6166
NORTHERN CALIFORNIA MEDICAL ASSOC INC
Internal Medicine
3536 MENDOCINO AVE, STE 300
SANTA ROSA, CA 95403
Sonoma County (707) 573-6942
DR. DENISE KAYSER M.D.
Ophthalmology (Retina Specialist)
3536 MENDOCINO AVE, STE 380
SANTA ROSA, CA 95403
Sonoma County (707) 575-5353
EMINE C. LOXLEY DMD, PC
Clinic/Center (Dental)
3536 MENDOCINO AVE, SUITE 330
SANTA ROSA, CA 95403
Sonoma County (707) 545-4104
DR. VISHAL GHANSHYAM PATEL M.D.
Internal Medicine (Interventional Cardiology)
3536 MENDOCINO AVE, STE 200
SANTA ROSA, CA 95403
Sonoma County (707) 573-6166

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 Thomas Guyn's NPI number?

The NPI number for Thomas Guyn is 1265596191. It was assigned to this individual provider in the NPPES registry on December 22, 2006.

Where is Thomas Guyn located?

Thomas Guyn practices at 3536 Mendocino Ave Ste 300, Santa Rosa, CA 95403. The listed phone number is (707) 546-2180.

What is Thomas Guyn's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Thomas Guyn was last updated on August 11, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 years 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.