Dr. Aaron Lee Haag , DO
Internal Medicine • Hershey, PA
Professional Overview & Biography Verified Profile Summary
Dr. Aaron Haag, DO is a registered healthcare professional specializing in Internal Medicine in Hershey, PA. Practice services are available at 500 UNIVERSITY DR under active NPI credentials.
Practice Location & Contact Primary Location
500 University Dr
Hershey, PA 170332360
Specialty Benchmarks & Practice Insights
Comparative analytics for Internal Medicine in Hershey, PA
Practicing in Hershey, PA (7609 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Medical Specialties & State Licenses
CMS Verified: 2026-06-23NUCC 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.
Secondary Practice Locations
4727 Friendship Ave Ste 200
Pittsburgh, PA 152241778
Phone: 4122355810
1307 Federal St Ste B300
Pittsburgh, PA 152124775
Phone: 4123593751
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Surgery - Vascular Surgery
Doctor of Medicine (M.D.)
Pediatrics - Pediatric Endocrinology
Bachelor of Medicine, Bachelor of Surgery (M.B.B.S.)
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Internal Medicine - Hematology & Oncology
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Physical Therapist
Physical Therapist, Doctor of Physical Therapy
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
Registered at 500 UNIVERSITY DR, HERSHEY, PA 170332360 (Tel: 8002431455)
Registered at 500 UNIVERSITY DR, HERSHEY, PA 170332360 (Tel: 8002431455)
Registered at 1307 FEDERAL ST STE B300, PITTSBURGH, PA 152124775 (Tel: 4123593751)
Registered at 1307 FEDERAL ST STE B300, PITTSBURGH, PA 152124775 (Tel: 4123593751)
Internal Medicine (License #OS022136 in PA)
NPI status registered as active in NPPES database
Registered at 320 E NORTH AVE, PITTSBURGH, PA 152124756 (Tel: 4123594971)
Registered at 320 E NORTH AVE, PITTSBURGH, PA 152124772 (Tel: 4123594971)
Recorded as AARON HAAG, DO
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
500 University Dr
Hershey, PA 170332360
Phone: 8002431455
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