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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

John F Walker, RPH

Pharmacist in Brockton, MA · enumerated 2013 · practices at Theodoss Multi Services and Investments LLC.

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

National Provider Identifier

1639410111

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Registry record

Entity type Individual (Type 1)
Name John F Walker
Credential RPH
Sex Male
Practice address Brockton, MA, 02302
Phone (085) 886-8005
Enumeration date Mar 8, 2013
Last updated in NPPES Nov 2, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 0405547 (NY) Secondary
183500000X Pharmacist Pharmacy Service Providers · License PH239819 (MA) Secondary
183500000X Pharmacist Pharmacy Service Providers · License RP043707R (PA) Secondary
183500000X Pharmacist Pharmacy Service Providers · License A1-0005377 (DE) Primary
RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH 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.

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Frequently asked questions

Where does John Walker practice?
The practice location on file with NPPES is in Brockton, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Walker?
The National Provider Identifier (NPI) for John Walker is 1639410111, 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 2020-11-02.