Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregg Kent Mullens, PHARM.D.; D.D.S.

Pharmacist in Greenfield, MA · enumerated 2005.

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

National Provider Identifier

1003812538

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregg Kent Mullens

Credential PHARM.D.; D.D.S.

Sex Male

Practice address 40 School St, Ste 6, Greenfield, MA, 01301

Phone (413) 773-7766

Fax (413) 773-3050

Enumeration date Jun 21, 2005

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 15868 (MA) Secondary

1223G0001X General Practice Dentistry Dental Providers · License 5233 (NE) Secondary

183500000X Pharmacist Pharmacy Service Providers · License 19437 (MA) Primary

PHARMD · Doctor of Pharmacy: A licensed pharmacist with a professional doctorate in pharmacy. About the PHARMD credential

Other identifiers

Identifier	Type	State	Issuer
XO8195	Other	MA	BLUE CROSS/BLUE SHIELD ID

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 Gregg Mullens's NPI record?

Cross-check NPI 1003812538 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1003812538 active?

Yes, as of the latest NPPES snapshot, NPI 1003812538 is active (record last updated 2025-09-11).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.