NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christopher Douglas Mullin, LMSW

Clinical Social Worker in Port Huron, MI · enumerated 2007.

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

National Provider Identifier

1336328442

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Christopher Douglas Mullin
Credential LMSW
Sex Male
Practice address 1209 Richardson St, Port Huron, MI, 48060
Phone (810) 984-5156
Fax (810) 984-5228
Enumeration date Oct 25, 2007
Last updated in NPPES Sep 3, 2015

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers 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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Christopher Mullin's NPI record?
Cross-check NPI 1336328442 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1336328442 active?
Yes, as of the latest NPPES snapshot, NPI 1336328442 is active (record last updated 2015-09-03).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-09-03.