William L. Johnson, MD
Listed as a pediatric allergist, with a practice address in Saint Louis, Missouri.
This record may be out of date. The doctor’s record in the national provider registry hasn’t been updated since 2018, and they don’t appear in current Medicare records. They may have moved or retired. Call before you go.
Practice location 1
1 Childrens Pl
Saint Louis, MO 63110
From the records
- Specialty
- Pediatric allergist
- Records
- National provider registry only, not updated since 2018. May have moved or retired.
- Registry record
- Last updated January 2018
- NPI
- 1669476495 (national provider registry)
A listing isn’t a check of a license or board certification, and it doesn’t tell you whether a doctor is taking new patients or accepts your insurance. Call the practice. How we list doctorsChecking your insurance
Is this your listing?
If you’re this doctor or work at their practice, claim the listing to add details such as languages, a website and a booking link. It’s free, and it never changes where a doctor appears in our lists.
From CMS’s Doctors and Clinicians file (October 2026) and the national provider registry, NPPES (October 2026). Listings are free and in alphabetical order; we don’t rate or recommend doctors. How we list doctors