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Learn more about the medical team at Internal Medicine Faculty Associates:

Physicians Located in Suite 350:

Sophia Casely-Hayford, MD

Sophia Casely-Hayford, MD
Board Certification: Internal Medicine
Specialty: Internal Medicine
Medical Education: Columbia University

Dr. Casely-Hayford was excellent to work with. She took the time to get to know me and my health history, and I felt very at ease through the visit.

Patient of Sophia Casely-Hayford, MD
Stanley Fiel, MD

Stanley B. Fiel, MD, FACP, FCCP
Board Certification: Internal Medicine, Pulmonary Medicine
Specialties: Executive Health, Pulmonary Medicine
Medical Education: Medical College of Pennsylvania, Temple University Hospital; Hospital of the University of Pennsylvania

M. Patricia Harris, MD, FACP

M. Patricia Harris, MD, FACP
Board Certification: Internal Medicine
Specialty: Internal Medicine
Medical Education: University of Massachusetts

Brenda Matti, MD, FACP

Brenda Matti-Orozco, MD, FACP
Board Certification: Internal Medicine, Palliative Medicine
Specialty: Internal Medicine, Palliative Medicine
Medical Education: University of Santo Tomas, Philippines

Rafael Pajaro, MD

Rafael Pajaro, MD
Board Certification: Internal Medicine
Specialty: Internal Medicine
Medical Education: New York Medical College

Kathleen Pergament, DO

Kathleen Pergament, DO
Board Certification: Internal Medicine
Specialty: Internal Medicine
Medical Education: Lake Erie College of Osteopathic Medicine

Dr. Pergament is warm and wonderful! She listened to my concerns and did not minimize my questions. The staff members are extremely helpful! The best!

Patient of Kathleen Pergament, DO

Physicians Located in Suite 210:

Michael Barth, MD

Michael Barth, MD
Board Certification: Internal Medicine
Specialty: Internal Medicine
Medical Education: Ross University School of Medicine

Jason Kessler, MD, MPH

Jason Kessler, MD, MPH
Board Certification: Internal Medicine, Infectious Disease
Specialty: Infectious Disease
Medical School: SUNY Downstate
Residency: University of Pennsylvania
Fellowship: Columbia University Medical Center

Brenda Matti-Orozco, MD, FACP

Brenda Matti-Orozco, MD, FACP
Board Certification: Internal Medicine, Palliative Medicine
Specialty: Internal Medicine, Palliative Medicine
Medical Education: University of Santo Tomas, Philippines

Earl Nielsen, MD, FACP

Earl F. Nielsen, MD, FACP
Board Certification: Internal Medicine
Specialty: Nephrology
Medical Education: University of Vermont College of Medicine   

First time I met Dr. Barth. Virtual visit. He properly diagnosed my issue and prescribed the right medication. I really enjoyed speaking to him. Very easy and pleasant.

Patient of Michael Barth, MD
Anna Raska, MD

Anna M. Raska, MD
Board Certification: Internal Medicine
Specialty: Internal Medicine
Medical Education: Johns Hopkins University School of Medicine

Elsa Thomas, MD

Elsa Thomas, MD
Board Certification: Internal Medicine
Specialty: Internal Medicine
Medical Education: MCP Hahnemann University School of Medicine

Judith Tiongco, MD
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Judith P Tiongco, MD
Board Certification: Internal Medicine
Medical Education: University of the Philippines
Residency: Einstein Medical Center

Jessica Petilla, MD
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Jessica Petilla, MD
Board Certification: Geriatric Medicine, Internal Medicine
Specialty: Geriatric Medicine, Internal Medicine
Medical Education: University of the East R M Memorial Medical Center
Residency: Saint Luke's-Roosevelt Hospital

Patricia Gonzalez, APN

Patricia Gonzalez, APN
Board Certification: Family Nurse Practitioner
Specialty: Internal Medicine, Geriatric Medicine
Medical Education: Rutgers College of Nursing 

Irina Mandel, APN

Irina Mandel, APN
Specialty: Internal Medicine
Medical Education: William Paterson University

Dr. Petilla and her team are always very professional, caring and courteous. She always encourages questions and is willing to explain all her answers.

Patient of Jessica Petilla, MD

Our physicians see patients at Morristown Medical Center. They are affiliated with Atlantic Medical Group and are participating providers of Atlantic Accountable Care Organization.

We proudly serve as a training site for physicians in the specialty of internal medicine. As an academic facility, our mission is to provide high-quality medical education to our learners and compassionate, cost-effective services to patients and families consistent with the latest medical evidence.


Meet our residents >

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Internal Medicine Faculty Associates Locations

Morristown - Suite 210

435 South Street

Morristown, NJ 07960

973-971-7165

FAX 973-290-7675

Monday to Friday, 8:30am to 4:30pm

Morristown - Suite 350

435 South Street

Morristown, NJ 07960

973-971-6700

FAX 973-290-7480

Monday, Wednesday and Friday: 9:00am to 5:00pm Tuesday and Thursday: 9:00am to 7:00pm