1. Home
  2. Directory
  3. Oregon
  4. La Grande
  5. Dentist
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JAMES G MCMAHAN DMD
NPI 1063412302
Dentist - General Practice in La Grande, OR

Active since July 28, 2005PECOS Enrolled
504 4TH ST, LA GRANDE, OR 97850(541) 963-5632(541) 963-4584 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. James G Mcmahan Dmd NPPES

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

DR. JAMES G MCMAHAN DMD (NPI 1063412302) is an individual general practice provider in La Grande, Oregon, licensed in Oregon (5974) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1063412302
Entity TypeIndividualMale
Primary Taxonomy1223G0001X
Provider Legal NameDR. JAMES G MCMAHANCredential: DMD
Location Address504 4TH STLa Grande, OR 97850-1906
Mailing Address504 4th StLa Grande, OR 97850-1906 · (541) 963-5632 · Fax (541) 963-4584
Phone(541) 963-5632
Fax(541) 963-4584
Sole ProprietorNo
Enumeration DateJuly 28, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1063412302 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers
Taxonomy Code1223G0001X
License✔ Licensed in OR · 5974
Definition
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.
504 4TH ST, La Grande, OR 97850
Open in Google Maps ↗

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 G Mcmahan Dmd 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 97850 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
$84.82 typical visit price
range $54.96 – $166.64
Typical copayment $21.20 (range $13.74 – $41.66)
Most-billed visit code 99203
Established Patient
$68.64 typical visit price
range $17.68 – $136.19
Typical copayment $17.16 (range $4.42 – $34.04)
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 Mcmahan's NPI number?

The NPI number for James Mcmahan is 1063412302. It was assigned to this individual provider in the NPPES registry on July 28, 2005.

Where is James Mcmahan located?

James Mcmahan practices at 504 4th St, La Grande, OR 97850. The listed phone number is (541) 963-5632.

What is James Mcmahan's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

Is James Mcmahan enrolled in Medicare?

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

When was this NPI record last updated?

The NPPES record for James Mcmahan 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 35 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.