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Sierra Schaller-Mahl, CRNP

Primary Care Nurse Practitioner in Johnstown, PA · enumerated 2022 · practices at Kristina M. Wolf, Dmd, PC.

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

National Provider Identifier

1649927005

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Registry record

Entity type Individual (Type 1)
Name Sierra Schaller-Mahl
Credential CRNP
Sex Female
Practice address 100 Hostetler Rd, Johnstown, PA, 15904
Phone (814) 240-3432
Enumeration date Mar 7, 2022
Last updated in NPPES Mar 7, 2022

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License SP025431 (PA) Secondary
363LP2300X Primary Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License SP025431 (PA) Primary

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.

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Frequently asked questions

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Sierra Schaller-Mahl?
Sierra Schaller-Mahl is registered in NPPES with the primary taxonomy of Primary Care Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-03-07.