Summary

Dr. Leonard Mermel is an internal medicine physician who specializes in infectious disease. He earned his medical degree from Des Moines University College of Osteopathic Medicine and completed his residency at St. Louis University Hospital. With 42 years of experience in medicine, Dr. Mermel brings extensive knowledge to his practice. He provides care to patients in English.

Dr. Mermel practices at multiple locations throughout Providence, Rhode Island, including Rhode Island Hospital, The Miriam Hospital, Roger Williams Medical Center, and Women and Infants Hospital of Rhode Island. His dual expertise in internal medicine and infectious disease allows him to diagnose and treat a wide range of conditions affecting adult patients. He focuses on managing complex infections and providing comprehensive internal medicine care.

Overview based on verified provider data

Quick Facts

  • 42 years of experience
  • speaks English
  • St Louis University Hospital
  • 3 specialties
  • 15 areas of expertise
  • 3 board certifications
  • 4 hospital affiliations
  • 4 office locations
  • Male

Office Locations

Dr. Leonard Mermel has 4 locations

Rhode Island Hospital

593 Eddy StProvidence, RI 02903

The Miriam Hospital

164 Summit AveProvidence, RI 02906

Roger Williams Medical Center

825 Chalkstone AveProvidence, RI 02908

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Dr. Leonard Mermel, DODr. Karen L. Garibaldi, MDDr. Austin Ritter, DODr. Lunia Collado, MD
Internal MedicineInternal MedicineInternal MedicineInternal Medicine
4.8 
42 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English Speaks English Speaks Spanish, English
Providence , RIProvidence , RIProvidence , RIProvidence , RI
Med School: Des Moines University College Of Osteopathic Medicine Med School: University Of Connecticut School Medicine
Current Profile
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Insurance Plans Accepted by Dr. Leonard Mermel

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Leonard Mermel has the following 3 specialties

Specialty Expertise

Dr. Leonard Mermel has the following 15 areas of expertise

  • AIDS/HIV (Acquired Immunodeficiency Syndrome)
  • Bacteremia
  • Fever
  • Fungemia
  • Hepatitis C
  • HIV Infections
  • Human Immunodeficiency Virus (HIV/AIDS)
  • Immunization
  • Infection
  • Infectious Disease
  • Lyme Disease
  • Other
  • Pneumonia
  • Tuberculosis
  • Vaccination

Certifications, License, & Education

42 Years Experience

Dr. Leonard Mermel holds an expired medical license in the state of Rhode Island.

Medical License

Doctor Of Osteopathy with an expired medical license in the state of Rhode Island that expired in 2026.

Education & Training

Residency

Completed their residency at St Louis University Hospital.

Medical School

Graduated from Des Moines University College Of Osteopathic Medicine in 1984.

NPI Number

Dr. Mermel's NPI number is 1225078421.

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Frequently Asked Questions

Is Dr. Leonard Mermel accepting new patients?
Dr. Leonard Mermel has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
What languages does Dr. Leonard Mermel speak?
Dr. Leonard Mermel speaks English.
Does Dr. Leonard Mermel accept my insurance?
You can see the insurance plans that Dr. Leonard Mermel accepts on their Vitals profile.
Which hospitals is Dr. Leonard Mermel affiliated with?
Dr. Leonard Mermel is affiliated with Rhode Island Hospital, The Miriam Hospital, Roger Williams Medical Center, and Women And Infants Hospital Of Rhode Island.
Where is Dr. Leonard Mermel's office located?
Dr. Leonard Mermel's office is located at 593 Eddy St, Providence, RI, 02903.

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