Dr. Ryan Joseph Duff , MD
Internal Medicine • San Antonio, TX
Professional Overview & Biography Verified Profile Summary
Dr. Ryan Duff, MD is a registered healthcare professional specializing in Internal Medicine in San Antonio, TX. Practice services are available at 3551 ROGER BROOKE DR under active NPI credentials.
Practice Location & Contact Primary Location
3551 Roger Brooke Dr
San Antonio, TX 782344504
Specialty Benchmarks & Practice Insights
Comparative analytics for Internal Medicine in San Antonio, TX
Practicing in San Antonio, TX (9538 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Medical Specialties & State Licenses
CMS Verified: 2026-06-19NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
NUCC Taxonomy Code: 208D00000X
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Internal Medicine
Doctor of Osteopathic Medicine (D.O.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine - Pulmonary Disease
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Osteopathic Medicine (D.O.)
Internal Medicine - Critical Care Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Registered at 3551 ROGER BROOKE DR, JBSA FT SAM HOUSTON, TX 782344504 (Tel: 2109162153)
General Practice (License #2022041862 in MO)
Internal Medicine (License #2022041862 in MO)
Registered at 3551 ROGER BROOKE DR, SAN ANTONIO, TX 782344504 (Tel: 2109162153)
Registered at 3551 ROGER BROOKE DR, SAN ANTONIO, TX 782344504 (Tel: 2109162153)
General Practice (License #2022041862 in MO)
NPI status registered as active in NPPES database
Registered at 9040 JACKSON AVE, TACOMA, WA 984310001 (Tel: 2539682462)
Registered at 9040 JACKSON AVE, TACOMA, WA 984310001 (Tel: 2539682462)
Recorded as RYAN DUFF, MD
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
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NPI Administrative Meta
Mailing Address
3551 Roger Brooke Dr
Jbsa Ft Sam Houston, TX 782344504
Phone: 2109162153
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