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1012 Campbell Rd,
Houston, TX 77055
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(832) 460-6468
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The Campbell Medical Team

Dr. Cheryl Johnson, MD

A graduate of the University of Texas Health Science Center, Dr. Cheryl Johnson has been a family practice physician for over 18 years. She is excited to be a supervising medical director for Campbell Medical Group and is absolutely passionate about patient care. She is excited to be working in a multidisciplinary environment where conservative methods for chronic conditions are offered.


Dr. Suhyun An, DC, MSN, NP-C.

Dr. Suhyun AnDr. An is a cum laude graduate of the prestigious Parker College of Chiropractic. A long time resident of Houston, she majored in biochemistry and biophysical science at the University of Houston. After working at the MD Anderson Cancer center, she chose the career of chiropractic to help patients lead healthy and wellness lifestyle. She was the highest trained Chiropractic Biophysics practitioner in Houston, has been a guest speaker to the Houston Energy Football team, Memorial Drive Methodist Church, numerous other organizations.

She is currently enrolled in Fellowship program in Stem Cell Therapy with the American Academy of Anti-aging. Dr. An is also a published author. Her works include “The Pain Free Knee” (available on Amazon) and “Stem Cell Therapy,” scheduled to be available the first week of February. Dr. An frequently travels across the country to bring the latest technology and treatment to Campbell Medical Group and network with top doctors around the country and often consults other clinics and doctors on regenerative medicine.

Fueled by her desire to expand the scope of practice, Dr. An finished her bachelor’s degree in nursing and master’s degree in family nurse practitioner. When she’s not working, she enjoys hiking with her dog and cycling.


Dr. Shahram Shakeri, DC

Shahram ShakeriOriginally a civil engineer, Dr. Shakeri was motivated to pursue a medical career by a deep commitment to community service. He obtained a bachelor’s degree in biology and chemistry at the University of Houston and graduated from Texas Chiropractic College as a doctor of chiropractic. Since graduating, he has accumulated vast experience as a chiropractor and has become a highly sought after as a professional clinician. During his time off, Dr. Shakeri enjoys spending time with his wife and two young daughters.


Dr. Sarah Nieves

Dr Sarah NievesDr. Sarah Nieves is a native of Puerto Rico. She attended the University of Illinois at Urbana-Champaign, where she graduated with a Bachelor of Science Degree in Pre-Chiropractic Kinesiology. She then moved to Davenport, Iowa, to pursue a career in Chiropractic and graduated in 2009 with a Doctor of Chiropractic degree. Through the International Chiropractic Pediatric Association, she furthered her prenatal care and pediatrics studies and became a doula and a natural childbirth educator through Bradley Method, Inc.

Dr. Nieves operated her own clinic in Iowa and Illinois and helped hundreds of patients gain better health through chiropractic and nutrition. She loves the warm Texas weather and the southern hospitality.

In her spare time, Dr. Nieves loves to spend time with her family, her 2 daughters and fiance. She also enjoys cooking, yoga, and gardening.

  • Activator Methods Certified
  • Extremity Adjustment Certified
  • Thompson Drop Technique Certified
  • Webster Technique Certified
How Do Our Patients Feel About Us?
"Excellent Clinic! The staff were very helpful and polite from my initial phone call to every appointment day. All the doctors are friendly and knowledgeable. They took the time to explain my condition and my treatment options. Glad to find this clinic who can finally end my back pain!" Susan B.
"Dr. An is great and so is her staff. I saw her about 24 hours after an ankle injury - she recommended PRP injections. Now it's 3 days after the PRP treatment and I'm back to teaching and practicing yoga. I highly recommend Campbell Medical Group." Hope W.
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