Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Charles Frey Jr., DO

Individual provider Allergy & Immunology Physician · NPI 1356321244

Charles Frey Jr., DO is an Allergy & Immunology Physician in Rockford, Illinois. Licensed in Illinois. Registered with an NPI since 2006.

Licensed in
IL
In the registry since
2006
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

698 Featherstone Rd
Rockford, IL 61107-6303
Phone: (815) 398-3277
Fax: (815) 484-7001
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Allergy & Immunology Physician (primary) Taxonomy 207K00000X · Licence 036063367 (IL)
Pediatric Allergy/Immunology Physician Taxonomy 2080P0201X · Licence 036063367 (IL)

Record details

NPI number1356321244
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJanuary 18, 2006
Last updated in NPPESSeptember 21, 2011

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