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SETH JAMES LARSEN DO
NPI 1427687359
Emergency Medicine in Jbsa Lackland, TX

Active since April 03, 2020PECOS Enrolled
1100 WILFORD HALL LOOP BLDG 4554, JBSA LACKLAND, TX 78236(210) 292-7331 Get Directions Write a Review

NPPES record last updated: July 28, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 17, 2025, Apr 3, 2020 (2 updates tracked since 2020).

About Seth James Larsen Do NPPES

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

SETH JAMES LARSEN DO (NPI 1427687359) is an individual emergency medicine provider in Jbsa Lackland, Texas, licensed in California (20A21119) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1427687359
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameSETH JAMES LARSENCredential: DO
Location Address1100 WILFORD HALL LOOP BLDG 4554Jbsa Lackland, TX 78236-5638
Mailing Address1100 Wilford Hall Loop Bldg 4554Jbsa Lackland, TX 78236-5638 · (210) 292-7331
Phone(210) 292-7331
Sole ProprietorNo
Enumeration DateApril 3, 2020
Last NPPES UpdateJuly 28, 20252 updates tracked since enumeration
NPPES CertifiedJuly 28, 2025
✔ NPI 1427687359 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CA · 20A21119
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.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1100 WILFORD HALL LOOP BLDG 4554, Jbsa Lackland, TX 78236
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, Sendero Health Plans, Local Nonprofit.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Seth James Larsen 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 Seth Larsen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Travis County Emergency Physicians PA
82 mi
Emergency Medicine
1201 W 38TH ST
Austin, TX 78705
  • Reassigned Medicare billing, Texas enrollment
  • 1,511 clinicians in this Medicare group
NPI 1962440933 (330) 493-4443
Pinnacle Emergency Physicians Of Bakersfield, A Professional Corp
1,258 mi
Emergency Medicine
420 34TH ST
Bakersfield, CA 93301
  • Reassigned Medicare billing, California enrollment
  • 200 clinicians in this Medicare group
NPI 1619153251 (661) 327-4647

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 78236 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.

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.

DR. REGINA MARIA REINSVOLD M.D.
Anesthesiology
1100 WILFORD HALL LOOP BLDG 4554
LACKLAND AFB, TX 78236
Bexar County (210) 292-6255
ROBERT LEE LMFT
Marriage & Family Therapist
1100 WILFORD HALL LOOP BLDG 4554
JBSA LACKLAND, TX 78236
Bexar County (210) 292-6255
DR. FINIANNE JIMENEZ UMALI-CORRY DO, MPH
Internal Medicine
1100 WILFORD HALL LOOP BLDG 4554
LACKLAND AFB, TX 78236
Bexar County (210) 292-4277
DAVID CHRISTOPHER MARI D.O.
Allergy & Immunology
1100 WILFORD HALL LOOP BLDG 4554
JBSA LACKLAND, TX 78236
Bexar County (210) 292-6255
DR. HANNAH GHONG-JU AHN MD
Radiology (Diagnostic Radiology)
1100 WILFORD HALL LOOP BLDG 4554
JBSA LACKLAND, TX 78236
Bexar County (210) 292-4482
MRS. CASSANDRA LANETTE DOUGLAS PHARMACIST
Pharmacist
1100 WILFORD HALL LOOP BLDG 4554
JBSA LACKLAND, TX 78236
Bexar County (102) 292-1144
DR. CHARLES RICHARD ELCHERT JR. D.C.
Chiropractor
1100 WILFORD HALL LOOP BLDG 4554
JBSA LACKLAND, TX 78236
Bexar County (210) 292-3587
DR. LISA LEADER KOHLER OD
Optometrist
1100 WILFORD HALL LOOP BLDG 4554
JBSA LACKLAND, TX 78236
Bexar County (210) 292-6255

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 Seth Larsen's NPI number?

The NPI number for Seth Larsen is 1427687359. It was assigned to this individual provider in the NPPES registry on April 3, 2020.

Where is Seth Larsen located?

Seth Larsen practices at 1100 Wilford Hall Loop Bldg 4554, Jbsa Lackland, TX 78236. The listed phone number is (210) 292-7331.

What is Seth Larsen's specialty?

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

Is Seth Larsen enrolled in Medicare?

Yes. Seth Larsen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Seth Larsen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Seth Larsen reassigns Medicare benefits to 2 organizations: Travis County Emergency Physicians PA (Austin, TX) and Pinnacle Emergency Physicians Of Bakersfield, A Professional Corp (Bakersfield, CA). 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 Seth Larsen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Seth Larsen accept?

Health plans from Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas and Sendero Health Plans, Local Nonprofit list Seth Larsen 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 Seth Larsen was last updated on July 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.