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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.

DENISE JOHNSTONE MSN, CRNP
NPI 1245239276
Nurse Practitioner - Family in Washington, DC

Active since July 20, 2005
2150 PENNSYLVANIA AVE NW, SUITE 10-412, WASHINGTON, DC 20037(202) 741-3398(202) 741-3398 Get Directions Write a Review

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

About Denise Johnstone Msn, Crnp NPPES

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

DENISE JOHNSTONE MSN, CRNP (NPI 1245239276) is an individual family provider in Washington, District Of Columbia, licensed in District Of Columbia (RN965339) and active in the NPI registry since July 2005.

NPPES Registry Identity

NPI1245239276
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameDENISE JOHNSTONECredential: MSN, CRNP
Location Address2150 PENNSYLVANIA AVE NW, SUITE 10-412Washington, DC 20037-3201
Mailing Address2150 Pennsylvania Ave Nw, Suite 10-412Washington, DC 20037-3201 · (202) 741-3398 · Fax (202) 741-3398
Phone(202) 741-3398
Fax(202) 741-3398
Sole ProprietorNo
Enumeration DateJuly 20, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1245239276 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in DC · RN965339
2150 PENNSYLVANIA AVE NW, Washington, DC 20037
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Other Names 1

Former Name (1)Denise Hough Msn, Crnp

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.

LEI DU LYNN M.D.
Internal Medicine
2150 PENNSYLVANIA AVE NW, SUITE 5-416
WASHINGTON, DC 20037
District of Columbia (202) 741-2574
NIRAJ RAJU GOWDA MD
Student in an Organized Health Care Education/Training Program
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-3000
DR. ELLEN CURTIN MURPHY MD
Obstetrics & Gynecology (Obstetrics)
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-2500
DR. CHRISTOPHER DAVID BADGER MD
Student in an Organized Health Care Education/Training Program
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-3000
DR. MONICA MARIA MANRIQUE CASTRILLON MD
Student in an Organized Health Care Education/Training Program
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-3000
DR. STEVEN JOSEPH RALSTON MD
Obstetrics & Gynecology (Maternal & Fetal Medicine)
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-2500
ROBERT STEVEN SIEGEL M.D.
Internal Medicine (Hematology & Oncology)
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-3333
JAMES DAVID KATZ M.D.
Internal Medicine (Rheumatology)
2150 PENNSYLVANIA AVE NW
WASHINGTON, DC 20037
District of Columbia (202) 741-2222

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 Denise Johnstone's NPI number?

The NPI number for Denise Johnstone is 1245239276. It was assigned to this individual provider in the NPPES registry on July 20, 2005. The provider is also known as Denise Hough Msn, Crnp.

Where is Denise Johnstone located?

Denise Johnstone practices at 2150 Pennsylvania Ave NW Suite 10-412, Washington, DC 20037. The listed phone number is (202) 741-3398.

What is Denise Johnstone's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

When was this NPI record last updated?

The NPPES record for Denise Johnstone 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 26 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.