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Derek N Walcker, PMHNP

Psychiatric/Mental Health Nurse Practitioner in Columbia, MD · enumerated 2019.

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

National Provider Identifier

1285286831

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Registry record

Entity type Individual (Type 1)
Name Derek N Walcker
Credential PMHNP
Sex Male
Practice address 5850 Waterloo Rd Ste 140, Columbia, MD, 21045
Phone (410) 988-2503
Fax (410) 343-7899
Enumeration date Jul 14, 2019
Last updated in NPPES Aug 16, 2020

Taxonomy & licenses

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License APRN.CNP.025119 (OH) Secondary
363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License R189093 (MD) 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

Where does Derek Walcker practice?
The practice location on file with NPPES is in Columbia, MD. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Derek Walcker?
The National Provider Identifier (NPI) for Derek Walcker is 1285286831, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-16.