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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.

MS. NANCY LOU TWITCHEL APRN,BC,FNP, MSN
NPI 1740229640
Registered Nurse in Washington, DC

Active since June 06, 2006
1441 L ST. NW, WASHINGTON, DC 20230(202) 606-9911 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

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

About Ms. Nancy Lou Twitchel Aprn,bc,fnp, Msn NPPES

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

MS. NANCY LOU TWITCHEL APRN,BC,FNP, MSN (NPI 1740229640) is an individual registered nurse in Washington, District Of Columbia, licensed in District Of Columbia (RN66806) and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1740229640
Entity TypeIndividualFemale
Primary Taxonomy163W00000X
Provider Legal NameMS. NANCY LOU TWITCHELCredential: APRN,BC,FNP, MSN
Location Address1441 L ST. NWWashington, DC 20230-0001
Mailing Address800 E Roanoke RdSterling, VA 20164-3318 · (703) 464-8596
Phone(202) 606-9911
Sole ProprietorNo
Enumeration DateJune 6, 2006
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1740229640 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyRegistered NurseNursing Service Providers
Taxonomy Code163W00000X
License✔ Licensed in DC · RN66806
Definition
(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive either a diploma from a hospital program, an associate degree in nursing (A.D.N.) or a Bachelor of Science degree in nursing (B.S.N.), who is licensed or certified by the state, and is practicing within the scope of that license or certification. R.N.'s assist patient in recovering and maintaining their physical or mental health. They assist physicians during treatments and examinations and administer medications. (2) A provider who is trained and educated in a formal nursing education program at an accredited school of nursing, passes a national certification examination, and is licensed by the state to practice nursing. The individual provides nursing services to patients or clients in areas such as health promotion, disease prevention, acute and chronic care and restoration and maintenance of health across the life span.
Also ListedRegistered Nurse · Medical-SurgicalTaxonomy 163WM0705X · License 0001084328 (VA)
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License 0024165921 (VA), RN66806 (DC)
1441 L ST. NW, Washington, DC 20230
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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 Nancy Twitchel's NPI number?

The NPI number for Nancy Twitchel is 1740229640. It was assigned to this individual provider in the NPPES registry on June 6, 2006.

Where is Nancy Twitchel located?

Nancy Twitchel practices at 1441 L St. NW, Washington, DC 20230. The listed phone number is (202) 606-9911.

What is Nancy Twitchel's specialty?

The primary specialty registered for this NPI is Registered Nurse with taxonomy code 163W00000X.

When was this NPI record last updated?

The NPPES record for Nancy Twitchel 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 54 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.