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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. WILLIAM BARNARD CLEM III M.D.
NPI 1700862505
Emergency Medicine in Denver, CO

Active since December 22, 2005
1719 E 19TH AVE, HYPERBARIC MEDICINE CENTER, P/SL MEDICAL CENTER, DENVER, CO 80218(303) 839-6900(303) 839-6157 Get Directions Write a Review

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

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

About Dr. William Barnard Clem Iii M.d. NPPES

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

DR. WILLIAM BARNARD CLEM III M.D. (NPI 1700862505) is an individual emergency medicine provider in Denver, Colorado, licensed in Colorado (29361) and active in the NPI registry since December 2005.

NPPES Registry Identity

NPI1700862505
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. WILLIAM BARNARD CLEM IIICredential: M.D.
Location Address1719 E 19TH AVE, HYPERBARIC MEDICINE CENTER, P/SL MEDICAL CENTERDenver, CO 80218
Mailing AddressPo Box 260155Littleton, CO 80163-0155 · (303) 471-1634 · Fax (720) 344-5586
Phone(303) 839-6900
Fax(303) 839-6157
Sole ProprietorNo
Enumeration DateDecember 22, 2005
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1700862505 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CO · 29361
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
Also ListedPreventive Medicine · Undersea and Hyperbaric MedicineTaxonomy 2083P0011X · License 29361 (CO)
1719 E 19TH AVE, Denver, CO 80218
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Other Identifiers 1

Medicaid04004891CO

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. LISA MARIE GRISS MD
Pediatrics
1719 E 19TH AVE
DENVER, CO 80218
Denver County (303) 754-4400
MARIAH MEEKS RN
Registered Nurse (Critical Care Medicine)
1719 E 19TH AVE
DENVER, CO 80218
Denver County (720) 754-6000
ALAN J. COMO
Emergency Medicine
1719 E 19TH AVE
DENVER, CO 80218
Denver County (303) 839-7111
KATHRYN BRECHT MS, NNP-BC
Nurse Practitioner (Neonatal)
1719 E 19TH AVE
DENVER, CO 80218
Denver County (303) 839-6000
OBSTETRIX MEDICAL GROUP OF COLORADO, P.C.
Pediatrics (Pediatric Cardiology)
1719 E 19TH AVE
DENVER, CO 80218
Denver County (303) 839-6000
DANIEL W LAWLER
Anesthesiology
1719 E 19TH AVE
DENVER, CO 80218
Denver County (303) 869-2429
DR. HEATHER EMILY JOHNSON MD
Hospitalist
1719 E 19TH AVE
DENVER, CO 80218
Denver County (713) 500-6526
DR. AMY ELIZABETH SCHMIDT MD, PHD
Internal Medicine (Hematology & Oncology)
1719 E 19TH AVE
DENVER, CO 80218
Denver County (720) 754-6851

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 William Clem's NPI number?

The NPI number for William Clem is 1700862505. It was assigned to this individual provider in the NPPES registry on December 22, 2005.

Where is William Clem located?

William Clem practices at 1719 E 19th Ave Hyperbaric Medicine Center, P/Sl Medical Center, Denver, CO 80218. The listed phone number is (303) 839-6900.

What is William Clem's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

When was this NPI record last updated?

The NPPES record for William Clem 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 27 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.