DR. JOHN MARK WILLIAMS MD
NPI 1467596189
Allergy & Immunology in Denver, CO

Q: What is John Williams's NPI number?

The NPI number for John Williams is 1467596189. It was assigned to this individual provider in the NPPES registry on February 16, 2007.

Q: What is John Williams's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Q: When was this NPI record last updated?

The NPPES record for John Williams was last updated on June 8, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.

Active since February 16, 2007

10350 E DAKOTA AVE, DENVER, CO 80247(303) 338-4545 Get Directions Write a Review

NPPES record last updated: June 8, 2021. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Jun 8, 2021, Mar 20, 2020 (2 updates tracked since 2020).

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About Dr. John Mark Williams Md NPPES

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

DR. JOHN MARK WILLIAMS MD (NPI 1467596189) is an individual allergy & immunology provider in Denver, Colorado, licensed in Colorado (28411) and active in the NPI registry since February 2007.

NPPES Registry Identity

NPI1467596189

Entity TypeIndividualMale

Primary Taxonomy207K00000X

Provider Legal NameDR. JOHN MARK WILLIAMSCredential: MD

Location Address10350 E DAKOTA AVEDenver, CO 80247-1314

Mailing Address10350 E Dakota AveDenver, CO 80247-1314

Phone(303) 338-4545

Sole ProprietorNo

Enumeration DateFebruary 16, 2007

Last NPPES UpdateJune 8, 20212 updates tracked since enumeration

NPPES CertifiedJune 8, 2021

✔ NPI 1467596189 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

License✔ Licensed in CO · 28411

Definition

An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

10350 E DAKOTA AVE, Denver, CO 80247

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Other Identifiers 2

Medicaid01284116CO

Other004597Kaiser-commercial Number

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.

LAUREN ELIZABETH HILLARY PA-C

Physician Assistant

10350 E DAKOTA AVE
DENVER, CO 80247

Denver County (303) 338-4545

DR. LISA D WHITESIDES MD

Pediatrics

10350 E DAKOTA AVE
DENVER, CO 80247

Denver County (303) 338-4545

MARJORIE E COOKE-BARTSCH

Registered Nurse (Psychiatric/Mental Health)

10350 E DAKOTA AVE
DENVER, CO 80247

Denver County (303) 344-7283

DR. JOHN PAUL WILKINS MD

Internal Medicine (Sleep Medicine)

10350 E DAKOTA AVE
DENVER, CO 80247

Denver County (303) 338-4545

MARCI J HOLSTEGE NP

Nurse Practitioner

10350 E DAKOTA AVE, STE B
DENVER, CO 80247

Denver County (303) 338-4545

DR. LORI GREENE MD

Psychiatry & Neurology (Psychiatry)

10350 E DAKOTA AVE
DENVER, CO 80247

Denver County (303) 338-3800

PATRICIA E WENDLE LCSW

Social Worker (Clinical)

10350 E DAKOTA AVE, SUITE B
DENVER, CO 80247

Denver County (303) 338-4545

ANNE E READ NP

Nurse Practitioner (Family)

10350 E DAKOTA AVE
DENVER, CO 80247

Denver County (303) 338-4545

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 John Williams's NPI number?

The NPI number for John Williams is 1467596189. It was assigned to this individual provider in the NPPES registry on February 16, 2007.

Where is John Williams located?

John Williams practices at 10350 E Dakota Ave, Denver, CO 80247. The listed phone number is (303) 338-4545.

What is John Williams's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

When was this NPI record last updated?

The NPPES record for John Williams was last updated on June 8, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.