Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JAMES EDWARD DUNCAN M.D.
NPI 1508867797
Colon & Rectal Surgery in Bethesda, MD

Q: What is James Duncan's NPI number?

The NPI number for James Duncan is 1508867797. It was assigned to this individual provider in the NPPES registry on August 10, 2005.

Q: What is James Duncan's specialty?

The primary specialty registered for this NPI is Colon & Rectal Surgery with taxonomy code 208C00000X.

Q: When was this NPI record last updated?

The NPPES record for James Duncan 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 40 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.

Active since August 10, 2005PECOS Enrolled

NATIONAL NAVAL MEDICAL CENTER, DEPT. OF SURGERY, 8901 WISCONSIN AVE., BETHESDA, MD 20889(301) 295-4603 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Dr. James Edward Duncan M.d. NPPES

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

DR. JAMES EDWARD DUNCAN M.D. (NPI 1508867797) is an individual colon & rectal surgery provider in Bethesda, Maryland, licensed in Virginia (0101057915) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1508867797

Entity TypeIndividualMale

Primary Taxonomy208C00000X

Provider Legal NameDR. JAMES EDWARD DUNCANCredential: M.D.

Location AddressNATIONAL NAVAL MEDICAL CENTER, DEPT. OF SURGERY, 8901 WISCONSIN AVE.Bethesda, MD 20889-0001

Mailing Address6102 Wilson LnBethesda, MD 20817-3111 · (301) 320-3909

Phone(301) 295-4603

Sole ProprietorNo

Enumeration DateAugust 10, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1508867797 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyColon & Rectal SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208C00000X

License✔ Licensed in VA · 0101057915

Definition

A colon and rectal surgeon is trained to diagnose and treat various diseases of the intestinal tract, colon, rectum, anal canal and perianal area by medical and surgical means. This specialist also deals with other organs and tissues (such as the liver, urinary and female reproductive system) involved with primary intestinal disease.

NATIONAL NAVAL MEDICAL CENTER, DEPT. OF SURGERY, Bethesda, MD 20889

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. James Edward Duncan M.d. 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20889 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

$100.31 typical visit price

range $65.18 – $194.86

Typical copayment $25.07 (range $16.29 – $48.71)

Most-billed visit code 99203

Established Patient

$80.66 typical visit price

range $21.40 – $158.88

Typical copayment $20.16 (range $5.35 – $39.72)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 James Duncan's NPI number?

The NPI number for James Duncan is 1508867797. It was assigned to this individual provider in the NPPES registry on August 10, 2005.

Where is James Duncan located?

James Duncan practices at National Naval Medical Center, Dept. Of Surgery 8901 Wisconsin Ave., Bethesda, MD 20889. The listed phone number is (301) 295-4603.

What is James Duncan's specialty?

The primary specialty registered for this NPI is Colon & Rectal Surgery with taxonomy code 208C00000X.

Is James Duncan enrolled in Medicare?

Yes. James Duncan is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for James Duncan 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 40 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.