Internal Medicine

Call us: 877-600-0346 ext. 965

Internal medicine is the diagnosis and treatment of a wide variety of adult medical problems. Some internal medicine specialists complete advanced education and training in another specialty as well. An internal medicine physician can serve as your primary healthcare provider or family doctor.

All FHN providers are either board-certified or board-eligible specialists in internal medicine. Med/Peds providers are board-certified or board-eligible specialists in pediatrics as well as internal medicine, and can care for people of all ages.

FHN family practice providers also provide internal (adult) medicine services.

Our Providers




Renu Dosi MD

Board Certification: Internal Medicine
Location: FHN Family Healthcare Center – Burchard Hills

Contact Information:
Phone: 1-815-599-7740
Fax: 815-599-7650



Timothy Laurie DO, FACP

Board Certification: Gastroenterology
Location: FHN Family Healthcare Center – Mt. Carroll, FHN Memorial Hospital, FHN Specialty Care – Stephenson Street

Contact Information:
Phone: 1-815-599-7715
Fax: 815-599-7107



Diana C. McNulty MD

Board Certification: Internal Medicine
Location: FHN Family Healthcare Center – Burchard Hills

Contact Information:
Phone: 1-815-599-7740
Fax: 815-599-7667



M. J. Merry MD

Board Certification: Internal Medicine, Pediatrics
Location: FHN Family Healthcare Center – Burchard Hills, FHN Memorial Hospital

Contact Information:
Phone: 1-815-599-7790
Fax: 815-599-7656



Lynda Shiro MS, FNP-BC

Board Certification: Nurse Practitioner
Location: FHN Family Healthcare Center – Burchard Hills

Contact Information:
Phone: 1-815-599-7740
Fax: 815-599-7650



Rovinder S. Singh Saini MD

Board Certification: Internal Medicine, Rheumatology, Clinical Densitometrist
Location: FHN Family Healthcare Center – Burchard Hills

Contact Information:
Phone: 1-815-599-7740
Fax: 815-599-7650




Need help? Finding the right providers for you and your family is an important step in ensuring your best health. If you need help finding a provider, please call us at 1-877-6000-FHN, 1-877-600-0346 ext 965, or you can download the FHN Location/Provider Directory.

Many of our specialty care offices require a referral from primary care for your initial visit, so if you're already an FHN patient, you may need to contact your primary care provider for more information. If you're new to FHN, or don't have a primary care provider, call the number above and you'll have a primary care appointment before you hang up the phone!* Thank you for choosing FHN!

*Restrictions or requirements of health insurance carriers may apply; eligibility will be confirmed during our conversation with you.