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

Dr. John Kenneth Mallen, MD

Q: What is the NPI number for John Mallen?

The National Provider Identifier (NPI) for John Mallen is 1427037951, a Type 1 (individual) record in the CMS NPPES registry.

Plastic Surgery Physician in Salem, NH · enumerated 2006.

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

National Provider Identifier

1427037951

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Registry record

Entity type Individual (Type 1)

Name Dr. John Kenneth Mallen

Credential MD

Sex Male

Practice address Salem, NH, 03079

Phone (603) 894-9898

Fax (603) 894-6270

Enumeration date Jan 12, 2006

Last updated in NPPES Sep 4, 2012

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

Taxonomy & licenses

208200000X Plastic Surgery Physician Allopathic & Osteopathic Physicians · License 10052 (NH) Primary

208200000X Plastic Surgery Physician Allopathic & Osteopathic Physicians · License 154434 (MA) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
0103459Y0NH01	Other	NH	BC
21296	Other	-	HARVARD
29841	Other	-	FALLON
07571390	Other	-	CIGNA
154434	Other	-	TUFTS
JIF258	Other	MA	BC

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 John Mallen practice?

The practice location on file with NPPES is in Salem, NH. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for John Mallen?

The National Provider Identifier (NPI) for John Mallen is 1427037951, 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 2012-09-04.