THOMAS C GUYN MD INC
NPI 1861766560
Internal Medicine in Santa Rosa, CA

Q: What is Thomas C Guyn MD Inc's NPI number?

The NPI number for Thomas C Guyn MD Inc is 1861766560. It was assigned to this organization in the NPPES registry on February 28, 2012.

Q: What is Thomas C Guyn MD Inc's specialty?

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

Active since February 28, 2012

1165 MONTGOMERY DR, SANTA ROSA, CA 95405(707) 525-5300 Get Directions Write a Review

NPPES record last updated: February 28, 2012. Verified against the NPPES registry weekly; last sync: July 26, 2026.

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About Thomas C Guyn Md Inc NPPES

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

THOMAS C GUYN MD INC (NPI 1861766560) is a healthcare organization registered as an internal medicine in Santa Rosa, California and active in the NPI registry since February 2012. The organization lists Thomas C Guyn, Physician, as its authorized official.

NPPES Registry Identity

NPI1861766560

Entity TypeOrganization

Primary Taxonomy207R00000X

Legal Business NameTHOMAS C GUYN MD INC

Location Address1165 MONTGOMERY DRSanta Rosa, CA 95405-4801

Mailing Address122 Calistoga Rd # 329Santa Rosa, CA 95409-3702 · (707) 547-5437 · Fax (707) 547-5430

Phone(707) 525-5300

Organization SubpartNo

Authorized OfficialThomas C GuynPhysician · (952) 936-7736

Enumeration DateFebruary 28, 2012

✔ NPI 1861766560 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.

1165 MONTGOMERY DR, Santa Rosa, CA 95405

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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

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.

MS. SHARON JEAN MCDONALD RNFA

Registered Nurse

1165 MONTGOMERY DR, SANTA ROSA MEMORIAL HOSPITAL
SANTA ROSA, CA 95405

Sonoma County (707) 525-5272

DR. ERIC JOSEPH MARGOLIS M.D.

Pediatrics (Neonatal-Perinatal Medicine)

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 525-5368

JOHN WOLFE MD

Pathology (Anatomic Pathology & Clinical Pathology)

1165 MONTGOMERY DR, PATHOLOGY DEPT
SANTA ROSA, CA 95405

Sonoma County (209) 575-4575

RICHARD WILBER MD

Pathology (Anatomic Pathology & Clinical Pathology)

1165 MONTGOMERY DR, PATHOLOGY DEPT
SANTA ROSA, CA 95405

Sonoma County (209) 575-4575

MARK DEMEO MD

Pathology (Anatomic Pathology & Clinical Pathology)

1165 MONTGOMERY DR, PATHOLOGY DEPT
SANTA ROSA, CA 95405

Sonoma County (209) 575-4575

MARGARET ANNE MCEVOY MD

Anesthesiology

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 546-3210

CHARLES GEOFFREY DEMITZ MD

Anesthesiology

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 546-3210

MARGARET ANN FANUCCHI MD

Anesthesiology

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 546-3210

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 C Guyn MD Inc's NPI number?

The NPI number for Thomas C Guyn MD Inc is 1861766560. It was assigned to this organization in the NPPES registry on February 28, 2012.

Where is Thomas C Guyn MD Inc located?

Thomas C Guyn MD Inc is located at 1165 Montgomery Dr, Santa Rosa, CA 95405. The listed phone number is (707) 525-5300.

What is Thomas C Guyn MD Inc'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 C Guyn MD Inc was last updated on February 28, 2012. NPI Profile syncs with the weekly NPPES data releases published by CMS.