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DR. JOHN F. KEISER MD, PHD
NPI 1720194103
Pathology - Medical Microbiology in Washington, DC

Active since August 21, 2006
900 23RD ST NW, WASHINGTON, DC 20037(202) 994-3391 Get Directions Write a Review

NPPES record last updated: September 15, 2020. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. John F. Keiser Md, Phd NPPES

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

DR. JOHN F. KEISER MD, PHD (NPI 1720194103) is an individual medical microbiology provider in Washington, District Of Columbia, licensed in District Of Columbia (MD15828) and active in the NPI registry since August 2006.

NPPES Registry Identity

NPI1720194103
Entity TypeIndividualMale
Primary Taxonomy207ZM0300X
Provider Legal NameDR. JOHN F. KEISERCredential: MD, PHD
Location Address900 23RD ST NWWashington, DC 20037-2342
Mailing Address900 23rd St NwWashington, DC 20037-2342 · (202) 994-3391
Phone(202) 994-3391
Sole ProprietorNo
Enumeration DateAugust 21, 2006
Last NPPES UpdateSeptember 15, 2020
NPPES CertifiedSeptember 11, 2020
✔ NPI 1720194103 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPathology · Medical MicrobiologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZM0300X
License✔ Licensed in DC · MD15828
Definition
A medical microbiologist is expert in the isolation and identification of microbial agents that cause infectious disease. Viruses, bacteria and fungi, as well as parasites, are identified and, where possible, tested for susceptibility to appropriate antimicrobial agents.
Also ListedPathology · Clinical Pathology/Laboratory MedicineTaxonomy 207ZP0105X · License MD15828 (DC)
900 23RD ST NW, Washington, DC 20037
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Other Identifiers 1

Medicaid028848500DC

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. MUSTAFA BASSAM HAMMUDI MD
Internal Medicine
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 715-5109
DR. WILLIAM ANDREW HIATT MD
Student in an Organized Health Care Education/Training Program
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 741-3000
DR. SHANE ZAMANI MD
Anesthesiology
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 715-4750
MRS. KATHERINE CAROLINE FOX PA-C, MPH
Physician Assistant (Surgical)
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 715-5000
MICHAEL WILLIAM HELBIG MD
Student in an Organized Health Care Education/Training Program
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 741-3100
DR. AYAL ZEV PIERCE MD
Emergency Medicine
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 715-4000
CALLIE BEEGLE PA-C
Physician Assistant
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 715-4000
MEGAN KATHLEEN DAILEY PA-C
Physician Assistant
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 741-2210

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 Keiser's NPI number?

The NPI number for John Keiser is 1720194103. It was assigned to this individual provider in the NPPES registry on August 21, 2006.

Where is John Keiser located?

John Keiser practices at 900 23rd St NW, Washington, DC 20037. The listed phone number is (202) 994-3391.

What is John Keiser's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Medical Microbiology, with taxonomy code 207ZM0300X.

When was this NPI record last updated?

The NPPES record for John Keiser was last updated on September 15, 2020. 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.