Clinicians affiliated with Memorial Hermann Hospital System

Acute Care Hospitals · Voluntary non-profit - Private · 1635 North Loop West, Houston, TX 77008 · Houston-Pasadena-The Woodlands, TX · CCN 450184

Affiliation snapshotNovember 2, 2026CMS Doctors and Clinicians Facility Affiliation file, current snapshot (no end-of-2024 archive), applied to 2024

Activity year2024Medicare Part B claims, Original Medicare fee-for-service

3,013 clinicians affiliated with Memorial Hermann Hospital System are in the 2024 Medicare Part B data (3,297 listed in the affiliation file).

Each clinician's exact figures are in their Physician Report, from their page. View sample report · Already purchased? Open your report (earlier Local report and passes)

Affiliated clinicians by specialty, 2024

All specialties · Family Practice (330) · Internal Medicine (308) · Diagnostic Radiology (226) · Nurse Practitioner (165) · Anesthesiology (145) · Orthopedic Surgery (139) · Hospitalist (119) · Cardiology (118) · Neurology (111) · Emergency Medicine (106) · Physician Assistant (100) · Nephrology (84) · Obstetrics & Gynecology (81) · Gastroenterology (80) · Certified Registered Nurse Anesthetist (CRNA) (76) · Anesthesiology Assistant (69) · General Surgery (63) · Urology (52) · Pulmonary Disease (49) · Critical Care (Intensivists) (44) · Hematology-Oncology (44) · Rheumatology (42) · Interventional Cardiology (40) · Otolaryngology (39) · Physical Medicine and Rehabilitation (39) · Endocrinology (37) · Neurosurgery (35) · Podiatry (35) · Pathology (28) · Infectious Disease (27) · Clinical Cardiac Electrophysiology (18) · Colorectal Surgery (Proctology) (15) · Medical Oncology (15) · Pain Management (15) · Interventional Radiology (14) · Thoracic Surgery (11) · Geriatric Medicine (10) · Interventional Pain Management (10) · Vascular Surgery (10) · Radiation Oncology (9) · Psychiatry (7) · Gynecological Oncology (6) · Ophthalmology (6) · Cardiac Surgery (5) · General Practice (4) · Pediatric Medicine (4) · Plastic and Reconstructive Surgery (4) · Advanced Heart Failure and Transplant Cardiology (3) · Hand Surgery (3) · Sports Medicine (3) · Surgical Oncology (3) · Certified Nurse Midwife (1) · Dermatology (1) · Hematology (1) · Hospice and Palliative Care (1) · Maxillofacial Surgery (1) · Sleep Medicine (1) · Undersea and Hyperbaric Medicine (1)

Urology affiliated with Memorial Hermann Hospital System, 2024

Alphabetical by last name; 52.

Name	City
Leyla Akhverdiyeva	Cypress, TX
James Anaissie, M.D.	Houston, TX
Brenton N Armstrong, M.D.	Houston, TX
Itunu Oluwa Arojo, M.D	Sugar Land, TX
Hajar Ayoub, MD	Houston, TX
Nathaniel L Barnes, M.D.	Webster, TX
Lawrence O Baum, M.D.	Houston, TX
William C Buschemeyer, MD	Conroe, TX
Steven E Canfield, M.D.	Houston, TX
Paolo C Champion, MD	Houston, TX
Clyde L Corey, M.D.	Tomball, TX
Douglas S Dow, M.D.	Webster, TX
Drew A Dylewski, M.D.	The Woodlands, TX
Michael F Graham, MD	Kingwood, TX
Travis P Green, M.D.	Houston, TX
Justin Gyorfi, M.D.	Spring, TX
Nehemia Hampel, M.D.	Cleveland, OH
Ori Hampel, M.D.	Pasadena, TX
Alan E Hananel, MD	Houston, TX
Peter P Hinh, MD	Houston, TX
An N Hoang, M.D.	Sugar Land, TX
Matthew M Hogan, MD	Tomball, TX
Matthew Hoggatt, MD	Webster, TX
Ruiyang Jiang, M.D	Houston, TX
Christopher R Kannady	Houston, TX
Paul R Kenworthy, MD	Huntsville, TX
Richard Kim, M.D.	Houston, TX
Ira Krause, M.D.	Humble, TX
Ramesh Krishnan, MD	Houston, TX
Ajay Kwatra, MD	Conroe, TX
Russell P Libby, MD	Cypress, TX
Miguel A Mercado, MD	Tomball, TX
Thanh A Nguyen, MD	Webster, TX
Kevin G Nickell, MD	Houston, TX
Daniel Phillips, MD	Sugarland, TX
Grant P Redrow, M.D.	Houston, TX
Paul Rizk, MD	Shenandoah, TX
Zvi J Schiffman, MD	Houston, TX
Samir P Shirodkar, MD	The Woodlands, TX
Tung Shu, M.D.	Houston, TX
Paul J Smith, MD	Houston, TX
Samit D Soni, M.D.	Houston, TX
Angie L Staller, M.D	Houston, TX
Marshall Stein, M.D.	Houston, TX
Ned B Stein, M.D.	Houston, TX
Steven W Sukin, M.D.	Tomball, TX
Karen M Tart, M.D.	Sugar Land, TX
Brenda Tharian, M.D.	Shenandoah, TX
Olubayo D Tojuola, M.D.	Orlando, FL
Gavin N Wagenheim, M.D.	Houston, TX
Erwin C Winkel, MD	Houston, TX
Liliana Woo, MD	Tomball, TX

Affiliation comes from the CMS Doctors and Clinicians Facility Affiliation file, hospital rows only; name, address and type from the CMS Hospital General Information file. CMS does not publish an end-of-year archive of the affiliation file, so the current snapshot is applied to the latest data year. A clinician listed with several hospitals or groups appears on each of their pages. How hospital pages are built