David Insoo An, M.D.

NPI 1972922862ActiveIndividual· Internal Medicine· Mc Lean, VA

Internal Medicine (M.D.) in Mc Lean, Virginia, trained at Georgetown University School of Medicine (class of 2014). Part D covered 73 prescriptions written in 2024, 92% of them generic.

Overview

NPI	1972922862
Status	Active
Entity type	Individual
Credential	M.D.
Sole proprietor	Yes
NPI issued	Apr 8, 2014
Last updated in NPPES	Jun 20, 2021
Certified by provider	Jun 20, 2021

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine Primary	207R00000X	0101261829	VA

About license numbers in NPPES

Exclusion screening

List	Result	Details
HHS-OIG LEIE · Oct 9, 2026	No match	Checked by NPI and by name + state
North Carolina Medicaid · Nov 10, 2026	No match	—
New York OMIG · Nov 10, 2026	No match	—
Ohio Medicaid · Nov 10, 2026	No match	—
Pennsylvania Medicheck · Nov 10, 2026	No match	—
Washington HCA · Nov 10, 2026	No match	—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)	Enrolled Practitioner - Internal Medicine (DC); Practitioner - Internal Medicine (VA)

Part D prescriptions in 2024

Prescriptions (claims)	73 · 80 30-day fills
Patients	42
Total drug cost	$5,000
Generic share	92% of claims

Medicare sources and data years

Education and affiliations

Medical school	Georgetown University School of Medicine
Graduation year	2014
Medicare specialty	Internal Medicine

Medical group

Kaiser Foundation Health Plan of the Mid Atlantic States, IncLargo, MD · 1,899 clinicians

Hospital affiliation

Virginia Hospital CenterArlington, VA

Source: CMS Care Compare

Industry payments (Open Payments)

None reported for 2025 or 2024.

Receiving payments does not imply wrongdoing. What Open Payments covers ·original records

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All Internal Medicine providers in Virginia →