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GARY WILLIAM DUFRESNE DO
NPI 1689664930
Emergency Medicine in Fort Sam Houston, TX

Active since October 27, 2005PECOS Enrolled
3851 ROGER BROOKE DR, BROOKE ARMY MEDICAL CENTER, MCHE-QD/ CREDENTIALS, FORT SAM HOUSTON, TX 78234(210) 916-2460 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

About Gary William Dufresne Do NPPES

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

GARY WILLIAM DUFRESNE DO (NPI 1689664930) is an individual emergency medicine provider in Fort Sam Houston, Texas, licensed in Indiana (02002851A) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1689664930
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameGARY WILLIAM DUFRESNECredential: DO
Location Address3851 ROGER BROOKE DR, BROOKE ARMY MEDICAL CENTER, MCHE-QD/ CREDENTIALSFort Sam Houston, TX 78234-4501
Mailing Address1003 River Gln WSan Antonio, TX 78216-7834 · (210) 408-2396
Phone(210) 916-2460
Sole ProprietorNo
Enumeration DateOctober 27, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1689664930 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in IN · 02002851A
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
3851 ROGER BROOKE DR, Fort Sam Houston, TX 78234
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, UnitedHealthcare.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gary William Dufresne Do 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 Gary Dufresne reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Emergency Medicine Services Of Tx, PLLC
10.0 mi
Emergency Medicine
7700 FLOYD CURL DR
San Antonio, TX 78229
  • Reassigned Medicare billing, Texas enrollment
  • 1,452 clinicians in this Medicare group
NPI 1245938729 (210) 575-4000
Victoria Emergency Associates LLC
97 mi
Emergency Medicine
506 E SAN ANTONIO ST
Victoria, TX 77901
  • Reassigned Medicare billing, Texas enrollment
  • 153 clinicians in this Medicare group
NPI 1407917164 (361) 575-7441

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

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
49 services49 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
37 services34 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78234 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
$84.92 typical visit price
range $54.84 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
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.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
1 supplier12 claims12 services$14.92 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
1 supplier12 claims12 services$64.04 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

MARGARET JACKSON PSY.D.
Psychologist
3851 ROGER BROOKE DR
FORT SAM HOUSTON, TX 78234
Bexar County (210) 916-1600
DR. RAJNIKANT C PATEL M.D
Anesthesiology (Critical Care Medicine)
3851 ROGER BROOKE DR, MCHE-QD (CREDENTIALS)
FORT SAM HOUSTON, TX 78234
Bexar County (210) 916-2118
FRANCIS KOBINA AGYAPONG NP
Nurse Practitioner (Acute Care)
3851 ROGER BROOKE DR, BROOKE ARMY MEDICAL CENTER, MCHE-QD(CREDS)
FORT SAM HOUSTON, TX 78234
Bexar County (719) 466-0576
MS. NATALIE R CHANG-MASON
Occupational Therapy Assistant
3851 ROGER BROOKE DR
FORT SAM HOUSTON, TX 78234
Bexar County (210) 916-5805
CONRAD GREGORY HAWKINS
Physical Therapist
3851 ROGER BROOKE DR, MCHE-QD (CRENDENTIALS)
FORT SAM HOUSTON, TX 78234
Bexar County (210) 916-2460
DR. CRAIG CAMPBELL MCFARLAND MD
Anesthesiology
3851 ROGER BROOKE DR, MCHE-QD (CREDS)
FORT SAM HOUSTON, TX 78234
Bexar County (210) 916-2460
ANDRE JOHN OGNIBENE MD
Internal Medicine
3851 ROGER BROOKE DR, MCHE-QD (CREDS)
FORT SAM HOUSTON, TX 78234
Bexar County (210) 916-5993
DR. MICHAEL DAY DULLEA M.D.
Radiology (Therapeutic Radiology)
3851 ROGER BROOKE DR, MCHE-QD (CREDENTIALS)
FORT SAM HOUSTON, TX 78234
Bexar County (210) 916-5046

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 Gary Dufresne's NPI number?

The NPI number for Gary Dufresne is 1689664930. It was assigned to this individual provider in the NPPES registry on October 27, 2005.

Where is Gary Dufresne located?

Gary Dufresne practices at 3851 Roger Brooke Dr Brooke Army Medical Center, Mche-Qd/ Credentials, Fort Sam Houston, TX 78234. The listed phone number is (210) 916-2460.

What is Gary Dufresne's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Gary Dufresne enrolled in Medicare?

Yes. Gary Dufresne is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gary Dufresne's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gary Dufresne reassigns Medicare benefits to 2 organizations: Emergency Medicine Services Of Tx, PLLC (San Antonio, TX) and Victoria Emergency Associates LLC (Victoria, TX). 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 Gary Dufresne's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gary Dufresne accept?

Health plans from Blue Cross and Blue Shield of Texas and UnitedHealthcare list Gary Dufresne 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 Gary Dufresne 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 3 months 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.