Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Christa F Massak, CRNP
Nurse Practitioner in Danville, PA · enumerated 2016.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1801340807
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Registry record
Entity type Individual (Type 1)
Name Christa F Massak
Credential CRNP
Sex Female
Practice address 100 N Academy Ave, Danville, PA, 17822
Phone (570) 271-6328
Fax (570) 271-6955
Enumeration date Aug 8, 2016
Last updated in NPPES Aug 31, 2020
Taxonomy & licenses
363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 26NJ00660100 (NJ) Secondary
363LG0600X Gerontology Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 26NJ00660100 (NJ) Secondary
363LP2300X Primary Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 26NJ00660100 (NJ) Secondary
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License SP016770 (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.
Frequently asked questions
Where does Christa Massak practice?
The practice location on file with NPPES is in Danville, PA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Christa Massak?
The National Provider Identifier (NPI) for Christa Massak is 1801340807, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-31.