
Overview
I am an allergist and immunologist who cares for children and adults. I manage patients with primary immunodeficiency and different allergic diseases. This includes managing patients with recurrent infections, allergic rhinitis, asthma, food allergy, drug allergy, stinging insect hypersensitivity, urticaria/ angioedema, and allergic skin disease. I also see patients with abnormal severe combined immunodeficiency newborn screen results.
Dr. Mousallem is rated as an Experienced provider by MediFind in the treatment of Severe Combined Immunodeficiency (SCID). His top areas of expertise are Angioedema, Severe Combined Immunodeficiency (SCID), X-Linked Severe Combined Immunodeficiency, and Omenn Syndrome.
Insurance
Accepted insurance can change. Please verify directly with the provider.
Accepted insurance plans:
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- PPO
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- POS
- PPO
- HMO
- POS
- PPO
- EPO
- HMO
- PPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- PPO
- HMO
- INDEMNITY
- POS
- PPO
- EPO
- POS
- PPO
- OTHER MANAGED MEDICAID
- OTHER MEDICAID
- STATE MEDICAID
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE PART D
- HMO
- POS
- INSURANCE PLAN
- MEDICARE MAPD
- OTHER COMMERCIAL
- PPO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE ASSISTANCE PROGRAM
- MEDICARE MAPD
- MEDICARE SNP
- OTHER COMMERCIAL
- OTHER MEDICARE
- OTHER MEDICARE PART D
- EPO
- HMO
- OTHER COMMERCIAL
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- EPO
- HMO
- POS
- PPO
- EPO
- HMO
- INSURANCE PLAN
- MANAGED MEDICAID PLAN
- MEDICARE MAPD
- MEDICARE PDP
- MEDICARE SNP
- MEDICARE-MEDICAID PLAN
- OTHER MEDICARE
- OTHER MEDICARE PART D
Locations
40 Duke Medicine Cir, Durham, NC 27710
2351 Erwin Rd, Durham, NC 27705
2301 Erwin Rd, Durham, NC 27705
Duke Children's Health Center Allergy And Immunology Clinic
John Sleasman is an Allergy and Immunologist in Durham, North Carolina. Dr. Sleasman has been practicing medicine for over 44 years and is rated as an Advanced provider by MediFind in the treatment of Severe Combined Immunodeficiency (SCID). His top areas of expertise are Severe Combined Immunodeficiency (SCID), HIV/AIDS, Infantile Neutropenia, and DiGeorge Syndrome.
Duke Children's Allergy And Immunology Creekstone
As an allergist and immunologist, and the spouse of someone with a food allergy, I bring both professional expertise and personal insight to my work. I am passionate about improving the quality of life for those with asthma, eczema, and food and environmental allergies. Having firsthand experience with the real-world challenges of managing allergic conditions, I take a collaborative approach to care, partnering with families to develop treatment plans that are not only effective, but also practical and aligned with their goals. I also have the privilege of caring for children with primary immunodeficiencies, including severe combined immunodeficiency and congenital athymia. My research focuses on optimizing newborn screening guidelines for these conditions, particularly in premature infants. I am committed to advancing treatment strategies and providing compassionate support to families navigating these complex conditions. Outside of work, I cherish time with my spouse and two children and take every opportunity to enjoy the outdoors. Dr. Hall is rated as an Advanced provider by MediFind in the treatment of Severe Combined Immunodeficiency (SCID). His top areas of expertise are Severe Combined Immunodeficiency (SCID), Infantile Neutropenia, Leukocyte Adhesion Deficiency Type 1, and Paroxysmal Nocturnal Hemoglobinuria (PNH).
Mary Markert is an Allergy and Immunologist and a Pediatrics provider in Durham, North Carolina. Dr. Markert is rated as a Distinguished provider by MediFind in the treatment of Severe Combined Immunodeficiency (SCID). Her top areas of expertise are Immune Defect due to Absence of Thymus, Pignata Guarino Syndrome, DiGeorge Syndrome, and Congenital Athymia.
Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
- Experienced
- Allergic RhinitisDr. Mousallem isExperienced. Learn about Allergic Rhinitis.
- AngioedemaDr. Mousallem isExperienced. Learn about Angioedema.
- Chronic Spontaneous Urticaria (CSU)Dr. Mousallem isExperienced. Learn about Chronic Spontaneous Urticaria (CSU).
- HivesDr. Mousallem isExperienced. Learn about Hives.
- Nonallergic RhinopathyDr. Mousallem isExperienced. Learn about Nonallergic Rhinopathy.
- Omenn SyndromeDr. Mousallem isExperienced. Learn about Omenn Syndrome.

