NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Margaret H Fruhbauer, DO

Internal Medicine Physician in Buffalo Grove, IL · enumerated 2008.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1851557102

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Margaret H Fruhbauer
Credential DO
Sex Female
Practice address 15 S Mchenry Rd Fl 2, Buffalo Grove, IL, 60089
Phone (847) 618-0351
Fax (847) 618-0766
Enumeration date Aug 5, 2008
Last updated in NPPES May 10, 2022

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036127394 (IL) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
036127394 Other IL STATE LICENSE

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Margaret Fruhbauer?
The National Provider Identifier (NPI) for Margaret Fruhbauer is 1851557102, a Type 1 (individual) record in the CMS NPPES registry.
Where does Margaret Fruhbauer practice?
The practice location on file with NPPES is in Buffalo Grove, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-10.