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Southern Nevada Internal Medicine Specialists 

Remember when the doctor remembered your name or spent time with you? Well, now it's time to reacquaint you to the heart of healing with Internal Medicine Specialists of Southern Nevada (IMS). Our full-service medical practice is devoted to treating acute and chronic conditions as well as focusing on the most important element in the health equation: You!


Internal Medicine Specialists has earned a respected reputation from colleagues and patients for providing exceptional internal medicine services. Owned and operated by the physicians—each with a unique style—the philosophy that wellness is the way to well-being is collectively embraced. The IMS team delivers comprehensive care including weight management, dietary counsel and stress reduction, as well as treating chronic conditions like heart disease, diabetes, hypertension and cancer. With most insurance accepted as well as on-site x-ray, cardiac testing, labs and ultrasound, IMS prioritizes your convenience.  IMS also understands that many delay medical care because of lack of insurance; that's why there are cash pay programs available.  IMS is poised and prepared to provide you exceptional internal medicine services. Be happy. Be healthy. Be well.


Babak Ghadishah from Internal Medicine Specialists

Babak Ghadishah, DO

Dr. Ghadishah earned two undergraduate degrees magna cum laude from UCLA, then went on to complete medical school at Touro University. He believes the best part of his profession is helping people feel better and he works hard to ensure good health for all his patients. He has won many awards for his patient care including his skill as a cosmetic injector.  Dr. Ghadishah is also a talented pianist and the married father of three young—and very loved—children. 

Gary Grossman from Internal Medicine Specialists

Gary Grossman, MD

Dr. Grossman is a long-time resident of Nevada and graduated with honors from the University of Nevada School of Medicine.  Dr. Grossman's meticulous and thorough style has resulted in a respected reputation amongst his peers and the gratitude of countless patients. While he works long hours to ensure his patient's well-being, he makes sure he attends his sons' lacrosse games. One of Dr. Grossman's guilty pleasures is eating pizza and watching re-runs of Seinfe

Dr David Rosenstein is a board certified Internal Medicine Specialist

David Rosenstein, MD

Dr. Rosenstein is an esteemed graduate of Boston University School of Medicine. After many years exclusively as a hospitalist, Dr. Rosenstein is pleased to also see patients in his office. Dr. Rosenstein is very active in medical education and served as Assistant Professor of Medicine for the University of Nevada School of Medicine and is also an Adjunct Assistant Professor of Internal Medicine for Touro University. Dr. Rosenstein enjoys practicing addiction medicine and helps his patients with Suboxone for opioid addiction. A single father with one child, he and his family enjoy camping and travel. 

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Matthew Pham, MD

Dr. Matthew Pham, MD grew up in Los Angeles, California.  Attended UCLA undergrad and trained at University of Nevada, School of Medicine. Spent most of his career working as the Chief of Medicine/Hospitalist at Desert Springs Hospital.  He transitioned into ambulatory, primary care April 2023 after Desert Springs Hospital relocated to West Henderson.  Having experienced the inpatient side of the care continuum, his focus now is to prevent unnecessary admissions to the inpatient by advocating preventative care.  On his free time, he likes to spend time with his family on the SoCal coastline and watch sports.

Dr Rebecca Sinai is a board certified Internal Medicine Specialist

Rebecca Sinai, DO

Dr. Rebecca Sinai has been part of Internal Medicine Specialists since 2017. She is board certified in Internal Medicine and has research publications to her credit. After obtaining her bachelors with Honors Cum Laude from Villanova University in Pennsylvania, Dr. Sinai attended medical school at Philadelphia College of Osteopathic Medicine. Her internships and residency were both in Las Vegas, Nevada at Lake Mead Hospital and University Medical Center, respectively. Dr. Sinai uses her keen mind to problem solve persistent patient challenges and delivering solutions with a heaping dose of TLC. A founding board member of Nevada Hospitalist Group, Dr. Sinai likes to spend her free time with her husband and their dogs on the beach in Laguna, California.

Physicians Assistant Dacia Taylor

Dacia Taylor, PA-C

Ms. Dacia Taylor is a nationally certified Physicians Assistant (PA-C) who obtained a Master's degree in Physician Assistant Studies from Touro University Nevada. Starting her medical career first as a Nursing Assistant and Patient Care Experience intern, she then went on to gain further experience working as a medical assistant in a primary care clinic. Dacia loves taking care of patients and each of their unique medical needs. She is happy to now continue caring for patients in the primary care setting as a PA-C. Ms. Taylor has continued to obtain additional certifications in smoking cessation, suicide prevention and helping individuals dealing with addiction and trauma. A native of Utah, Dacia loves visiting the mountains, hiking, traveling, playing with her Labrador dog, and trying new foods and activities.

Marlee Beauchamp, PA-C

Marlee Beauchamp, PA-C

Ms. Marlee Beauchamp received her Bachelor of Science in Applied Health Sciences from Point Loma Nazarene University in San Diego, California, graduating Magna Cum Laude. Her academic excellence propelled her to North Arizona University to obtain her Master of Physician Assistant Studies. Now a certified Physicians Assistant, Ms. Beauchamp uses her years of experience treating underserved minority populations in understanding the unique needs of IMS' young and mature patients. Ms. Beauchamp is an esteemed member of the American Academy of Physician Assistants and Nevada Academy of Physician Assistants. Her specialty in Internal Medicine allows her to help patients as both clinician and Health Coach. Ms. Beauchamp enjoys experimenting with new recipes, running and hiking with her husband and puppy Winston.

Jennifer Cribb, CNP

Jennifer Cribb, CNP

Ms. Jennifer Cribb has  been a Nurse Practitioner in Primary Care since 2005.  She is committed to providing comprehensive and attentive care to each patient. She embraces a holistic approach to  health, taking into account physical health, mental health, and lifestyle.  Delivering care with compassion and understanding is her top priority.  Prior to becoming a Nurse Practitioner, she worked in Critical Care and as a Flight Nurse for Flight For Life.  She is happy to have shifted into an area of healthcare where she can focus more on preventtion and early detection instead of crisis management.  When not working to improve pateint's health and well being, she enjoys playing tennis, reading, cooking with her husband, and playing with her three beautiful huskies.

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