Our Story

Rheumatology Associates was founded in 1975 by Roy Fleischmann, M.D. We have since grown to a group of 18 physicians, Board Certified in Rheumatology.  Our group provides care to patients throughout the Dallas/ Fort Worth Metroplex with convenient locations in Arlington, Dallas, Duncanville, Frisco, Grapevine, Irving, Lewisville, North Richland Hills, Plano and Rockwall.

We treat a variety of rheumatic diseases including rheumatoid arthritis, lupus, osteoarthritis, gout, ankylosing spondylitis, osteoporosis, sarcoidosis, scleroderma, reactive arthritis, and psoriatic arthritis.

We are proud to offer in-house diagnostic services critical to rheumatology needs including; full service x-ray, bone densitometry, and a CLIA certified laboratory for hematology, chemistry, and immunology.

Our Team


Stanley Cohen, M.D.

Dallas, Irving

Sharad Lakhanpal, M.D.

Dallas, Irving

Jack Vine, M.D.

Dallas, Plano

Robert Jenkins, M.D., Ph.D

Dallas, Duncanville, Rockwall

Thomas Geppert, M.D.

Dallas, Grapevine

Talat Kheshgi, M.D.

Dallas, Plano

Imran Iqbal, M.D.

Dallas, Duncanville, Frisco

Richard Stern, M.D.

Dallas, Grapevine

Zoran Kurepa, M.D., Ph.D

Dallas, Lewisville

Catalina Orozco, M.D.


Virginia Reddy, M.D.

Dallas, Grapevine

Margarita Fallena M.D.

Dallas, Grapevine

Giovanni Geslani, D.O.

Dallas, Arlington

Joanna Geslani, D.O.

Dallas, Arlington

Padmapriya Sivaraman, M.D.

Dallas, North Richland Hills

Riteesha Reddy, M.D.


Li Jiang, M.D.


Stephanie Hennigan, M.D.


M. Scott Hogenmiller, M.D.


Brittany Ahmed, M.D.

North Richland Hills

Nurse Practitioners

Susan Chrostowski, DNP, APRN, ANP-C


Sheila Behimehr, MS, APRN, AGNP-C

Rockwall, Dallas, Duncanville

Neena Mathews, MSN, APRN, FNP-C

Dallas, Frisco, Duncanville

Physician Assistants

Janet Maffei, MPAS, PA-C


Janine Shinn, MPAS, PA-C


Jasmine McElhany MPAS, PA-C