NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christine A Mack, OT

Occupational Therapist in Frederick, MD · enumerated 2009.

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

National Provider Identifier

1558696807

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Christine A Mack
Credential OT
Sex Female
Practice address 184 Thomas Johnson Dr Ste 104, Frederick, MD, 21702
Phone (301) 694-8311
Fax (301) 694-3537
Enumeration date Oct 5, 2009
Last updated in NPPES Apr 15, 2022

Taxonomy & licenses

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 06137 (MD) Primary
OT · Occupational Therapist: A licensed therapist helping patients develop or recover skills for daily living and working. About the OT 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 Christine Mack practice?
The practice location on file with NPPES is in Frederick, MD. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Christine Mack?
The National Provider Identifier (NPI) for Christine Mack is 1558696807, 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 2022-04-15.