
Dr. William Johnson, MD
Saint Louis, MO
38 Years of Experience
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Johnson, Pediatric Allergist & Immunologist in Saint Louis, MO?
Dr. William Johnson, MD is a Pediatric Allergist & Immunologist, who primarily practices in Saint Louis, MO with 1 additional practice location. He has been practicing for over 38 years and is board certified. Dr. Johnson graduated from University of Missouri-Columbia School of Medicine and completed his residency at Phoenix Hosp Affil Pd Prog, Pediatrics. Dr. Johnson is fluent in English, and is currently seeing new patients. Dr. Johnson’s practice accepts Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Johnson’s office at (314) 421-0663.
Where did Dr. Johnson go to medical school and complete their residency?
Residency: Phoenix Hosp Affil Pd Prog, Pediatrics | Phoenix Affiliated Hospitals Phoenix, AZ | Phoenix Hosp Affil Pd Prog, Pediatrics | Phoenix Hospitals Phoenix AZ
Medical School: University of Mo, Columbia Sch of Med, Columbia Mo | University of Missouri-Columbia School of Medicine
Is Dr. Johnson board certified as a Pediatric Allergist & Immunologist?
Yes, Dr. William Johnson, MD is board certified by the American Board of Pediatrics , American Board of Internal Medicine
What languages does Dr. Johnson speak?
Dr. Johnson and their clinical team can communicate with patients in the following languages:
English
What conditions does a Pediatric Allergist & Immunologist like Dr. Johnson typically treat?
As a Pediatric Allergist & Immunologist, Dr. Johnson diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Johnson. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Hay Fever
- Pollen allergy
- Seasonal allergies
- Allergic rhinitis
ICD-10 Codes:
- J301: Allergic rhinitis due to pollen
Also known as:
- Moderate Persistent Asthma
- Mild Persistent Asthma
- Asthma
- Ongoing Moderate Asthma
- Regular Moderate Asthma
- Chronic Moderate Asthma
- Ongoing Mild Asthma
- Regular Mild Asthma
- Chronic Mild Asthma
ICD-10 Codes:
- J4540: Moderate persistent asthma, uncomplicated
- J4530: Mild persistent asthma, uncomplicated
Also known as:
- Routine Blood Pressure Check (Normal Findings)
- Vital Signs
- Normal BP reading
- Blood pressure screening, all clear
- Healthy blood pressure check
ICD-10 Codes:
- Z0130: Encounter for examination of blood pressure without abnormal findings
Also known as:
- Chronic Hives
- Hives
- Hives of unknown cause
- Spontaneous urticaria
- Persistent welts
ICD-10 Codes:
- L501: Idiopathic urticaria
What procedures does a Pediatric Allergist & Immunologist like Dr. Johnson typically perform?
As a Pediatric Allergist & Immunologist, procedures performed by Dr. William Johnson may include:
- Allergy Consultation
- Allergy Follow Up
- Allergy Shots
- Allergy Testing
- Insect Bite(s)
- Sinus Surgeon Consultation
- Sinus Surgeon Follow Up
- Sinus Surgery
Please contact Dr. Johnson's office directly to confirm care for your specific procedure, for more information, or to schedule a consultation.
Does Dr. Johnson accept my insurance?
Dr. Johnson accepts most major insurance plans. Important: Please call our office at (314) 421-0663 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Johnson accept in Saint Louis, MO?
Dr. Johnson in Saint Louis, MO accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Medicare
View All Insurances
Where is Dr. Johnson's office located?
Dr. William Johnson's Primary Practice
1 Childrens Pl
Saint Louis, MO 63110
(314) 421-0663
What hospitals are Dr. Johnson affiliated with?
Castle Connolly Top Hospital
This doctor is affiliated with a Castle Connolly Top Hospital.
Dr. Johnson has admitting privileges at the following hospitals:
What is Dr. Johnson's NPI number?A National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Johnson's National Provider Identifier (NPI) number is 1669476495.
What common questions do patients ask about Dr. Johnson?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Johnson
What is Dr. William Johnson's specialty?
Dr. Johnson is a Pediatric Allergist & Immunologist near Saint Louis, MO.
What does a Pediatric Allergist & Immunologist do?
A Pediatric Allergist & Immunologist is a physician who specializes in diagnosing and treating allergies, asthma, and immune system disorders in infants, children, and adolescents. These specialists address conditions such as food allergies, eczema, hay fever, allergic reactions, primary immunodeficiencies, and autoimmune diseases, providing comprehensive care tailored to the unique needs of younger patients. They also focus on education and prevention strategies to improve long-term health outcomes.
Is Dr. William Johnson affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Johnson is affiliated with Osf Healthcare Saint Francis Medical Center, St. Luke's Hospital - Chesterfield, Mo which are a Castle Connolly Top Hospitals. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
When to see a Pediatric Allergist & Immunologist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see a Pediatric Allergist & Immunologist. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Dr. William Johnson accepting new patients in Saint Louis, MO?
Yes, Dr. William Johnson is accepting new patients at this time.
Does Dr. William Johnson offer online booking?
Please contact Dr. Johnson's office at (314) 421-0663 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Dr. William Johnson?
Please contact Dr. Johnson's office at (314) 421-0663 to schedule an appointment.
Where is Dr. Johnson's office located?
Dr. Johnson's office is located in Saint Louis, MO.
Which board certifications does Dr. William Johnson have?
Dr. William Johnson is certified by the American Board of Pediatrics and American Board of Internal Medicine.
Other Pediatric Allergist & Immunologist Near Saint Louis, MO
AB
Pediatric Allergist & Immunologist
Dr. Avraham Beigelman, MD is a Pediatric Allergist & Immunologist, who primarily practices in Saint Louis, MO.
Saint Louis, MO

Pediatric Allergist & Immunologist
Dr. Ronald Rubenstein, MD is a Pediatric Allergist & Immunologist, who primarily practices in Saint Louis, MO with 1 additional practice location. He is board certified.
Saint Louis, MO
BP
Pediatric Allergist & Immunologist
Dr. Brooke Polk, MD is a Pediatric Allergist & Immunologist, who primarily practices in Saint Louis, MO with 2 additional practice locations.
Saint Louis, MO
