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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. REGINALD GUY MD
NPI 1528063849
Internal Medicine in Longmont, CO

Active since June 14, 2005
1925 W MOUNTAIN VIEW AVE, LONGMONT, CO 80501(303) 776-1234(720) 494-3107 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Reginald Guy Md NPPES

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

DR. REGINALD GUY MD (NPI 1528063849) is an individual internal medicine provider in Longmont, Colorado, licensed in Colorado (20169) and active in the NPI registry since June 2005.

NPPES Registry Identity

NPI1528063849
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. REGINALD GUYCredential: MD
Location Address1925 W MOUNTAIN VIEW AVELongmont, CO 80501-3128
Mailing Address1925 W Mountain View AveLongmont, CO 80501-3128 · (303) 776-1234 · Fax (720) 494-3107
Phone(303) 776-1234
Fax(720) 494-3107
Sole ProprietorNo
Enumeration DateJune 14, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1528063849 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CO · 20169
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.
1925 W MOUNTAIN VIEW AVE, Longmont, CO 80501
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Other Identifiers 1

Medicaid01201698CO

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. LYLE M PFEIFER MD
Family Medicine
1925 W MOUNTAIN VIEW AVE
LONGMONT, CO 80501
Boulder County (303) 776-1234
LONGMONT CLINIC PC
General Practice
1925 W MOUNTAIN VIEW AVE
LONGMONT, CO 80501
Boulder County (720) 494-3173
DR. LINDA BACKUP MD
Internal Medicine (Interventional Cardiology)
1925 W MOUNTAIN VIEW AVE
LONGMONT, CO 80501
Boulder County (303) 776-1234
DR. KATHERINE DUEBER M.D.
Pediatrics
1925 W MOUNTAIN VIEW AVE
LONGMONT, CO 80501
Boulder County (303) 776-1234
MS. SHARON R KLOEPFER PA
Physician Assistant
1925 W MOUNTAIN VIEW AVE
LONGMONT, CO 80501
Boulder County (303) 776-1234
ROBERT O STARK NP
Nurse Practitioner
1925 W MOUNTAIN VIEW AVE
LONGMONT, CO 80501
Boulder County (303) 776-1234
DR. ROBERT VINCENT NOUHAN MD
Family Medicine
1925 W MOUNTAIN VIEW AVE
LONGMONT, CO 80501
Boulder County (303) 833-8880
MS. KAREN DELVECCHIO NP
Nurse Practitioner
1925 W MOUNTAIN VIEW AVE
LONGMONT, CO 80501
Boulder County (303) 776-1234

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 Reginald Guy's NPI number?

The NPI number for Reginald Guy is 1528063849. It was assigned to this individual provider in the NPPES registry on June 14, 2005.

Where is Reginald Guy located?

Reginald Guy practices at 1925 W Mountain View Ave, Longmont, CO 80501. The listed phone number is (303) 776-1234.

What is Reginald Guy'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 Reginald Guy was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.