Gretchen Harmon, MD
Listed as a pediatric allergist, with a practice address in Wilmington, Delaware.
This record may be out of date. The doctor’s record in the national provider registry hasn’t been updated since 2016, and they don’t appear in current Medicare records. They may have moved or retired. Call before you go.
Practice location 1
1600 Rockland Rd
Wilmington, DE 19803
From the records
- Specialty
- Pediatric allergist
- Records
- National provider registry only, not updated since 2016. May have moved or retired.
- Registry record
- Last updated August 2016
- NPI
- 1497156061 (national provider registry)
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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