0 reviews
Summary
Dr. Robert Theiss is an internal medicine physician who earned his medical degree from Ross University School of Medicine. With 13 years of experience in internal medicine, he focuses on the comprehensive care of adult patients. Dr. Theiss speaks English and provides medical care with expertise built over more than a decade of practice.
Dr. Theiss is affiliated with several respected healthcare facilities including ECU Health Medical Center, Lehigh Valley Hospital Muhlenberg, and Good Shepherd Specialty Hospital. He practices in Bethlehem, Pennsylvania, where he treats patients with abdominal disorders and blocked arteries. His clinical focus includes managing chronic diseases and providing physical exams and preventive care to help patients maintain their health.
Dr. Theiss is affiliated with several respected healthcare facilities including ECU Health Medical Center, Lehigh Valley Hospital Muhlenberg, and Good Shepherd Specialty Hospital. He practices in Bethlehem, Pennsylvania, where he treats patients with abdominal disorders and blocked arteries. His clinical focus includes managing chronic diseases and providing physical exams and preventive care to help patients maintain their health.
Overview based on verified provider data
Quick Facts
- accepting new patients
- 13 years of experience
- speaks English
- Ross University School Of Medicine
- 1 specialty
- 6 areas of expertise
- 1 board certification
- 5 hospital affiliations
- 1 office location
- Male
Office Location
LVPG Internal Medicine-Muhlenberg
2649 Schoenersville Rd Ste 201Bethlehem, PA 18017 Tel: (484) 884-8110
Mon7:00 am - 7:00 pm
Tue7:00 am - 7:00 pm
Wed7:00 am - 7:00 pm
Thu7:00 am - 7:00 pm
Fri7:00 am - 6:00 pm
Sat8:00 am - 12:00 pm
SunClosed
Compare with Similar Doctors
![]() | ![]() | ![]() | ![]() |
| Robert M. Theiss, MD | Dr. Jenny Liu, MD, MS, LD | Adam Adika | Dr. Michael Knolle, DO |
| Internal Medicine | Internal Medicine | Internal Medicine | Internal Medicine |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | Accepts New Patients |
| 13 Years of Experience | 29 Years of Experience | 6 Years of Experience | 23 Years of Experience |
| No Virtual Visit Option | No Virtual Visit Option | No Virtual Visit Option | Virtual Visit Available |
| Speaks English | Speaks Spanish, Chinese, English | Speaks English | |
| Bethlehem , PA | WARREN , NJ | Philadelphia , PA | Elizabethtown , PA |
| Med School: Ross University School Of Medicine | Med School: Guangdong Pharmaceutical University | Med School: Lewis Katz School Of Medicine At Temple University | Med School: Lake Erie College of Osteopathic Medicine |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Robert M. Theiss
Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.
Medical Specialties
Robert M. Theiss has the following specialty
Specialty Expertise
Robert M. Theiss has the following 6 areas of expertise
Certifications, License, & Education
13 Years Experience
Robert M. Theiss holds an active medical license in the state of Pennsylvania.
Medical License
Medical Doctor with an active medical license in the state of Pennsylvania that expires in 2026.
Education & Training
Medical School
Graduated from Ross University School Of Medicine in 2013.
NPI Number
Robert M. Theiss' NPI number is 1699174680.
Similar doctors
Frequently Asked Questions
- What languages does Robert Theiss speak?
- Robert Theiss speaks English.
- Which hospitals is Robert Theiss affiliated with?
- Robert Theiss is affiliated with Ecu Health Medical Center, Lehigh Valley Hospital Muhlenberg, Good Shepherd Specialty Hospital, LEHIGH VALLEY HOSPITAL HECKTOWN OAKS, and Lehigh Valley Hospital Macungie.
- Does Robert Theiss accept virtual/telehealth appointments?
- Robert Theiss has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
- How can I make an appointment with Robert Theiss?
- You can find contact information for Robert Theiss here on Vitals.
- Does Robert Theiss accept my insurance?
- You can see the insurance plans that Robert Theiss accepts on their Vitals profile.
Ensuring Data Transparency and Trust: A Guide to Vitals Doctor Listings and Reviews
Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.
Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.
Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.








