Johnson Haynes, Jr., M.D., Comprehensive Sickle Cell Center

The Johnson Haynes, Jr., M.D., Comprehensive Sickle Cell Center at the University of South Alabama provides consultation for the diagnosis, management, and treatment of children and adults with sickle cell disease.

Our mission is to improve the lives of persons affected by this disease through clinical care, basic and clinical research, and through patient and professional education, proving that there is: Life After Birth with Sickle Cell!


TRISICKLE for Sickle Cell: Take the Sickle Cell Pledge

Trisickle for Sickle Cell Banner 
A Fundraiser to Support The PACT Program

  • Take the pledge to TRISICKLE for Sickle Cell! See how far you can ride and video yourself riding a tricycle.
  • Don’t forget to share your video on social media with the tag #TriSickleForSickleCell and invite a friend to try!
  • Pledge $1 per foot and help us raise awareness and funds for Sickle Cell Disease.

Why are we raising funds for the PACT program?

The Johnson Haynes, Jr., M.D., Comprehensive Sickle Cell Center created Pediatric to Adult Care Transition Program (PACT) to help the adolescents and young adults with sickle cell disease transition from pediatric care to adult care. The funds generated from this campaign will be used to help provide the care and education needed.


Dr. Felicia Wilson presents “Gene Therapy: The Promise of a Cure..."


Meeting of the SCDAA Mobile Chapter


FOX10 News profile of Children's Miracle Champion Landen Sylvester


▼   Sickle Cell Programs/Services

Adult Care

Adult outpatient care for patients with sickle cell disease are held every Monday, Tuesday, Thursday, and Friday at the USA Mastin Physicians Office. This clinic is directed by Dr. Johnson Haynes, Jr., and staffed by a team comprised of nurse practitioners, a registered nurse and a social worker. In-hospital treatment of adult sickle cell patients is provided at USA Health University Hospital.

Pediatric Care

Outpatient care for children and adolescents with sickle cell disease is held every Tuesday at the USA Strada Patient Care Center. In-hospital services for patients are provided at USA Children's & Women's Hospital and are attended by Dr. Felicia Wilson and Dr. Hamayun Imran. The specialized sickle cell staff includes nurse practitioners, a registered nurse and a social worker.

Clinical Studies

The GBT HOPE (Hemoglobin Oxygen Affinity Modulation to Inhibit HbS PolymErization) study is a global clinical research study that will evaluate whether GBT440 will be safe and effective in reducing anemia, pain crises, fatigue and other day-to-day symptoms in adults and adolescents with sickle cell disease. It will also study the effects of different doses of GBT440 to determine the best dose to give to adolescents and adults with sickle cell disease. View the information sheet [PDF].


To refer a patient to the Johnson Haynes, Jr., M.D., Comprehensive Sickle Cell Center, or to arrange a consultation, call us at 1-800-388-8721. We are eager to share information about the latest sickle cell treatment and research. We welcome physician consults and referrals.

▼   What is Sickle Cell Disease?

Sickle Cell Disease is an inherited disorder which causes red blood cells to lose their ability to carry oxygen. While the normal red blood cell is shaped like a smooth and flexible disc, the sickle red blood cell becomes sickle shaped after oxygen is released from its hemoglobin. This sickle shaped red blood cell is hard and sticky and forms blockages in small blood vessels. These blockages lead to repeated acute and chronic tissue damage, chronic anemia and severe painful episodes.

Episodic pain events, infection and lung complications are the more common problems caused by sickle cell disease. Complications may include stroke, kidney failure, damage to joints, and other debilitating or life threatening conditions.

▼   Dr. Cecil L. Parker, Jr. Sickle Cell Disease Distinguished Endowed Lectureship

Dr. Cecil L. Parker, Jr. Sickle Cell Disease Distinguished Endowed Lectureship

From left: Dr. Hamayun Imran; Dr. Felicia Wilson; Dr. Johnson Haynes, Jr.; Dr. Hafeez Siddiqui; Dr. Cecil L. Parker, Jr.; Karen Marlowe, PharmD; Marilyn Chancellor, Coordinator; Ardie Pack-Mabien, CRNP, and Dr. Jane S. Hankins

The Dr. Cecil L. Parker, Jr. Sickle Cell Disease Distinguished Endowed Lectureship was established in 2008 to support sickle cell education for patients, physicians and allied health professionals in Mobile and surrounding counties, in perpetuity. The University of South Alabama chose to name this endowment to honor Dr. Parker for his service to USA and for his extensive and lengthy medical career of caring for adult patients affected with sickle cell disease. In 1986, Dr. Parker started his private practice in Mobile in Internal Medicine. Shortly thereafter, he was named the Director of the USA Adult Sickle Cell Center and served in this position for nine years. Even after resigning his post as Director, Dr. Parker continues to support the Johnson Haynes, Jr., M.D., Comprehensive Sickle Cell Center.

The mission of the Comprehensive Sickle Cell Center is to improve the lives of persons affected by sickle cell disease through state-of-the-art clinical care, clinical research and education. The establishment of the endowment is a critical component in realizing the mission of the Center. As a result, we have been able to assure the necessary educational outreach is and will always be in place to serve our patients and healthcare professionals. Ultimately, a well-informed healthcare community translates to optimum patient care and outcomes. Over the past several years, the Dr. Cecil L. Parker, Jr. Sickle Cell Disease Distinguished Endowed Lectureship, which is a component of the annual University of South Alabama Sickle Cell Regional Conference, has provided a platform to educate and equip over 1,200 healthcare providers with the knowledge to effectively assess, manage and assist patients who are affected by sickle cell disease.

None of this would be possible without the grass roots community efforts of individual and corporate donors. With the assistance of our supporters, we have raised over $130,000 to support our patients and their families as they struggle to cope with sickle cell disease. There are not enough words to thank those that have supported the endowment.

As we look toward the future, it is imperative to offer increased support to our patients and to assure the healthcare community is well informed about the most current clinical practices available in the care of patients with sickle cell disease. Please consider how you might reinforce our efforts to improve the lives of those persons affected by sickle cell disease. Join the USA faculty, staff, alumni, and friends to honor Dr. Parker by making a gift today to the Dr. Cecil L. Parker, Jr. Sickle Cell Disease Distinguished Endowed Lectureship [PDF].

All contributions are tax deductible.

▼   Contact Us

Johnson Haynes, Jr., M.D. 
Professor of Medicine
Director, Comprehensive Sickle Cell Center
(251) 470-5893 

Marilyn Chancellor
Secretary V
Administrative Office
(251) 470-5893
Fax: (251) 470-5895 

Felicia Wilson, M.D.
Professor of Medicine
Division Director, Pediatric Hematology / Oncology
Director, Children Youth Sickle Network
(251) 405-5115
Fax: (251) 405-5120 

Hamayun Imran, M.D., MSc.
Associate Professor of Pediatrics and 
Physician Assistant Studies
Medical Director, Pediatrics Hematology/Oncology
(251) 405-5115 

Ardie Pack Mabien, C.R.N.P.
Nurse Practitioner
(251) 470-5889 

Jessica L. King, C.R.N.P.
Nurse Practitioner
(251) 445-9159 

T'Shemika Perryman, R.N.
Sickle Cell Nurse
(251) 470-5875 

Sickle Cell Social Worker
(251) 432-0301
Fax: (251) 432-3347