Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Gary Lloyd Horn Jr., MD

Individual provider Diagnostic Radiology Physician · NPI 1720399629

Dr. Gary Lloyd Horn Jr., MD practises Diagnostic Radiology in Houston, Texas. Graduated from Baylor College of Medicine in 2010, 16 years ago. Practices with Singleton Associates PA, a 795-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts and Texas.

Years since qualifying
16
Trained at
Baylor College of Medicine
Licensed in
MA, TX
In the registry since
2010
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

6560 Fannin St
Houston, TX 77030-2761
Phone: (713) 441-4431
Fax: (713) 790-6615
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 7200 Cambridge St, Houston, TX 77030-4202 — (713) 798-2400

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence P3539 (TX)
Diagnostic Radiology Physician Taxonomy 2085R0202X · Licence 262077 (MA)

Record details

NPI number1720399629
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 24, 2010
Last updated in NPPESAugust 27, 2025
Certification dateAugust 27, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolBAYLOR COLLEGE OF MEDICINE
Graduated 2010 (16 years in practice)
Group practice Singleton Associates Pa — 795 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients935
Services billed 1,349 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Baylor St Lukes Medical Center Hospital · Houston, TX · listed as CHI St Luke's Health Baylor St Luke's Medical Center
  • St Luke'S Hospital At The Vintage Hospital · Houston, TX · listed as St Luke's Hospital at the Vintage LLC
  • St Luke'S Sugar Land Hospital Hospital · Sugar Land, TX · listed as St Lukes Community Development Corporation - Sugar Land
  • Chi St Luke'S Health Brazosport Hospital · Lake Jackson, TX
  • St Luke'S The Woodlands Hospital Hospital · The Woodlands, TX

Colleagues at Singleton Associates PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 795 clinicians in the practice; 12 are shown here.

Other providers in Houston