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THOMAS EUGENE HORST MD
NPI 1871642082
Family Medicine in Ajo, AZ

Active since January 09, 2007PECOS Enrolled
410 N MALACATE ST STE 100, AJO, AZ 85321(520) 387-5651(520) 387-6036 Get Directions Write a Review

NPPES record last updated: June 30, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 1, 2017, Jan 20, 2017, Jan 11, 2017 (3 updates tracked since 2017).

About Thomas Eugene Horst Md NPPES

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

THOMAS EUGENE HORST MD (NPI 1871642082) is an individual family medicine provider in Ajo, Arizona, licensed in Arizona (51196) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1871642082
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameTHOMAS EUGENE HORSTCredential: MD
Location Address410 N MALACATE ST STE 100Ajo, AZ 85321-2254
Mailing Address410 N Malacate St Ste 100Ajo, AZ 85321-2254 · (520) 387-5651 · Fax (520) 387-6036
Phone(520) 387-5651
Fax(520) 387-6036
Sole ProprietorNo
Enumeration DateJanuary 9, 2007
Last NPPES UpdateJune 30, 20233 updates tracked since enumeration
NPPES CertifiedJune 30, 2023
✔ NPI 1871642082 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
Licenses✔ Licensed in AZ · 51196✔ Licensed in WA · MD00020253
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
410 N MALACATE ST STE 100, Ajo, AZ 85321
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Other Identifiers 3

Medicaid2025929WA
Medicaid8335606WA
OtherP01769824 - DV4997WA · Railroad Medicare

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Thomas Eugene Horst Md 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 Thomas Horst reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Desert Senita Community Health Center
Same address
Federally Qualified Health Center (FQHC)
410 N MALACATE ST
Ajo, AZ 85321
  • Reassigned Medicare billing, Arizona enrollment
  • 20 clinicians in this Medicare group
NPI 1114037496 (520) 387-5651
We Care Daily Clinics LLC
1,144 mi
Methadone
3320 AUBURN WAY N
Auburn, WA 98002
  • Reassigned Medicare billing, Washington enrollment
  • 7 clinicians in this Medicare group
NPI 1326502865 (253) 999-5750

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 85321 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
$85.89 typical visit price
range $55.44 – $168.60
Typical copayment $21.47 (range $13.86 – $42.15)
Most-billed visit code 99203
Established Patient
$98.00 typical visit price
range $17.72 – $137.41
Typical copayment $24.50 (range $4.43 – $34.35)
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.

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 Thomas Horst's NPI number?

The NPI number for Thomas Horst is 1871642082. It was assigned to this individual provider in the NPPES registry on January 9, 2007.

Where is Thomas Horst located?

Thomas Horst practices at 410 N Malacate St Ste 100, Ajo, AZ 85321. The listed phone number is (520) 387-5651.

What is Thomas Horst's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Thomas Horst enrolled in Medicare?

Yes. Thomas Horst is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Thomas Horst's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Horst reassigns Medicare benefits to 2 organizations: Desert Senita Community Health Center (Ajo, AZ) and We Care Daily Clinics LLC (Auburn, WA). 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 Thomas Horst's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Thomas Horst was last updated on June 30, 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.