George O. Zenner Iii, MD

Medicare activity in 2024

Official CMS public-use data for George O. Zenner Iii, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Injection, methylprednisolone acetate, 1 mg (J1010)1,211 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)373 services
3. Insertion of needle into vein for collection of blood sample (36415)307 services
4. Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional (99211)231 services
5. Urinalysis, manual test (81002)136 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High cholesterol75%
• High blood pressure60%
• Ischemic heart disease34%
• Arthritis30%
• Diabetes22%
• Atrial fibrillation15%

Hospitals where George O. Zenner Iii works

Medicare's Facility Affiliation Data lists George O. Zenner Iii at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Memorial Hermann Memorial City HospitalHouston, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · CCN 450610

Practice locations

Addresses where George O. Zenner Iii is enrolled with Medicare (CMS data updated October 2, 2026).

• 5757 Woodway DrHouston, TX 77057 (713) 977‑0971
• 8215 Cypresswood DrSpring, TX 77379 (832) 717‑0877

Group practices

Medicare enrollment lists George O. Zenner Iii as a member of this group (CMS data updated October 2, 2026).

• Legacy Healthcare Services Inc3,223 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Texas →

Other family doctors in Houston

Clinicians with the same Medicare primary specialty in Houston, TX — not a recommendation.

• Michael D. Giglio, MD
• Hassan S. Quadri, DO
• Damien B. Sanderlin, MD
• Danielle Wininger, DO
• Amina Moheyuddin, MD
• Chandra R. Chaudhuri, MD
• Sree Latha Y. Ramphul, DO
• Aftab Ahmad, MD

All family doctors in Houston →

Other clinicians in Legacy Healthcare Services Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Elizabeth Y. Boehme, MD
• Heather Sabatino
• Ashley M. Wermers, OT
• Hannah L. Rowland
• Allison R. Herrold
• Ashleyrae Donald, DO

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians