NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Sarah E Tonelli, M.D.

Dermatology Physician in Glen Mills, PA · enumerated 2013.

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

National Provider Identifier

1235576075

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Sarah E Tonelli
Credential M.D.
Sex Female
Practice address 500 Evergreen Dr Ste 20, Glen Mills, PA, 19342
Phone (484) 785-3376
Fax (610) 358-6913
Enumeration date Jun 3, 2013
Last updated in NPPES Aug 9, 2018

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License MD463877 (PA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

Where does Sarah Tonelli practice?
The practice location on file with NPPES is in Glen Mills, PA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Sarah Tonelli?
The National Provider Identifier (NPI) for Sarah Tonelli is 1235576075, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-08-09.