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DR. DIRK JACOB VAN LEEUWEN M.D., PH.D., FAASLD
NPI 1205941309
Internal Medicine - Gastroenterology in Portland, OR

Active since August 20, 2006PECOS Enrolled
10000 SE MAIN ST STE 112, PORTLAND, OR 97216(503) 255-3054(503) 255-7651 Get Directions Write a Review

NPPES record last updated: February 22, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Feb 22, 2023, Sep 14, 2021, Jan 14, 2021 and 3 more (6 updates tracked since 2020).

About Dr. Dirk Jacob Van Leeuwen M.d., Ph.d., Faasld NPPES

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

DR. DIRK JACOB VAN LEEUWEN M.D., PH.D., FAASLD (NPI 1205941309) is an individual gastroenterology provider in Portland, Oregon, licensed in Oregon (CP206793) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Owensboro.

NPPES Registry Identity

NPI1205941309
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. DIRK JACOB VAN LEEUWENCredential: M.D., PH.D., FAASLD
Location Address10000 SE MAIN ST STE 112Portland, OR 97216-2441
Mailing Address10000 Se Main St Ste 112Portland, OR 97216-2441 · (503) 255-3054
Phone(503) 255-3054
Fax(503) 255-7651
Sole ProprietorNo
Enumeration DateAugust 20, 2006
Last NPPES UpdateFebruary 22, 20236 updates tracked since enumeration
NPPES CertifiedFebruary 22, 2023
✔ NPI 1205941309 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Licenses✔ Licensed in OR · CP206793✔ Licensed in KY · EMERGENT
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
10000 SE MAIN ST STE 112, Portland, OR 97216
Open in Google Maps ↗

Secondary Practice Location 1

Location 11301 Pleasant Valley Rd Ste 401Owensboro, KY 42303-9774 · Phone (270) 417-7800 · Fax (270) 417-7809

Other Identifiers 1

Medicaid100220249WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource (Common Ground Healthcare).Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Dirk Jacob Van Leeuwen M.d., Ph.d., Faasld is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Dirk Van Leeuwen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Owensboro Health Medical Group, Inc.
1,869 mi
Family Medicine
1997 BARRET CT, SUITE B
Henderson, KY 42420
  • Reassigned Medicare billing, Kentucky enrollment
  • 643 clinicians in this Medicare group
NPI 1588019186 (270) 827-8708
Webber Hospital Association
2,531 mi
Hospitalist
1 MEDICAL CENTER DR
Biddeford, ME 04005
  • Reassigned Medicare billing, Maine enrollment
  • Medicare enrollment name: Southern Maine Health Care
  • 253 clinicians in this Medicare group
NPI 1760669790 (207) 283-7000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 97216 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$134.16 typical visit price
range $58.99 – $176.88
Typical copayment $33.54 (range $14.74 – $44.22)
Most-billed visit code 99204
Established Patient
$103.51 typical visit price
range $19.32 – $144.79
Typical copayment $25.87 (range $4.83 – $36.19)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

VICTOR M FISHMAN MD
Internal Medicine (Gastroenterology)
10000 SE MAIN ST STE 112
PORTLAND, OR 97216
Multnomah County (503) 255-3054
GINGER L DEGRAVELLE MD
Internal Medicine (Gastroenterology)
10000 SE MAIN ST STE 112
PORTLAND, OR 97216
Multnomah County (503) 255-3054
LAURA PESTANA DO
Internal Medicine (Gastroenterology)
10000 SE MAIN ST STE 112
PORTLAND, OR 97216
Multnomah County (503) 255-3054
RICHARD W BRANDES MD
Internal Medicine (Gastroenterology)
10000 SE MAIN ST STE 112
PORTLAND, OR 97216
Multnomah County (503) 255-3054
DR. MILTON CHARLES JOHNSON M.D.
Internal Medicine (Gastroenterology)
10000 SE MAIN ST STE 112
PORTLAND, OR 97216
Multnomah County (503) 255-3054
JUSTIN STITES LEWIS M.D.
Internal Medicine (Gastroenterology)
10000 SE MAIN ST STE 112
PORTLAND, OR 97216
Multnomah County (503) 255-3054

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 Dirk Van Leeuwen's NPI number?

The NPI number for Dirk Van Leeuwen is 1205941309. It was assigned to this individual provider in the NPPES registry on August 20, 2006.

Where is Dirk Van Leeuwen located?

Dirk Van Leeuwen practices at 10000 SE Main St Ste 112, Portland, OR 97216. The listed phone number is (503) 255-3054.

What is Dirk Van Leeuwen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Dirk Van Leeuwen enrolled in Medicare?

Yes. Dirk Van Leeuwen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Dirk Van Leeuwen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Dirk Van Leeuwen reassigns Medicare benefits to 2 organizations: Owensboro Health Medical Group, Inc. (Henderson, KY) and Webber Hospital Association (Biddeford, ME). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Dirk Van Leeuwen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Dirk Van Leeuwen accept?

Health plans from CareSource (Common Ground Healthcare) list Dirk Van Leeuwen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Dirk Van Leeuwen was last updated on February 22, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.