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ROBERT ROY CHRISTOFF DO
NPI 1396671079
Family Medicine in Fairfax, VA

Active since June 22, 2026
3650 JOSEPH SIEWICK DR, FAIRFAX, VA 22033(703) 391-2020(703) 264-9861 Get Directions Write a Review

NPPES record last updated: June 22, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Robert Roy Christoff Do NPPES

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

ROBERT ROY CHRISTOFF DO (NPI 1396671079) is an individual family medicine provider in Fairfax, Virginia, licensed in Virginia (0116042211) and active in the NPI registry since June 2026.

NPPES Registry Identity

NPI1396671079
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameROBERT ROY CHRISTOFFCredential: DO
Location Address3650 JOSEPH SIEWICK DRFairfax, VA 22033-1710
Mailing Address3650 Joseph Siewick DrFairfax, VA 22033-1710 · (703) 391-2020 · Fax (703) 264-9861
Phone(703) 391-2020
Fax(703) 264-9861
Sole ProprietorNo
Enumeration DateJune 22, 2026
NPPES CertifiedJune 22, 2026
✔ NPI 1396671079 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in VA · 0116042211
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
3650 JOSEPH SIEWICK DR, Fairfax, VA 22033
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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.

THUY PHUONG THI VO M.D.
Family Medicine
3650 JOSEPH SIEWICK DR, 400
FAIRFAX, VA 22033
Fairfax County (703) 391-2020
KATHERINE BOOKER PT
Physical Therapist
3650 JOSEPH SIEWICK DR, SUITE 308
FAIRFAX, VA 22033
Fairfax County (703) 716-4794
DR. LAURA E. BYRNES M.D.
Pediatrics
3650 JOSEPH SIEWICK DR, STE 101
FAIRFAX, VA 22033
Fairfax County (703) 391-0900
DR. HEON SOO YI M.D.
Family Medicine
3650 JOSEPH SIEWICK DR, SUITE 400
FAIRFAX, VA 22033
Fairfax County (703) 391-2020
VICTORIA LESSINGER MERKEL MD
Family Medicine
3650 JOSEPH SIEWICK DR, STE 400
FAIRFAX, VA 22033
Fairfax County (703) 391-2020
BRENT R AIN MD
Orthopaedic Surgery
3650 JOSEPH SIEWICK DR, SUITE 300
FAIRFAX, VA 22033
Fairfax County (703) 391-0111
SANDY L. CHUNG M.D.
Pediatrics
3650 JOSEPH SIEWICK DR, STE 101
FAIRFAX, VA 22033
Fairfax County (703) 391-0900
DR. PETER STEPHEN ROSS MD
Internal Medicine (Endocrinology, Diabetes & Metabolism)
3650 JOSEPH SIEWICK DR, #305
FAIRFAX, VA 22033
Fairfax County (703) 648-1831

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 Robert Christoff's NPI number?

The NPI number for Robert Christoff is 1396671079. It was assigned to this individual provider in the NPPES registry on June 22, 2026.

Where is Robert Christoff located?

Robert Christoff practices at 3650 Joseph Siewick Dr, Fairfax, VA 22033. The listed phone number is (703) 391-2020.

What is Robert Christoff's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

When was this NPI record last updated?

The NPPES record for Robert Christoff was last updated on June 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 44 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.