Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David N Mayer, MD

Q: What is the NPI number for David Mayer?

The National Provider Identifier (NPI) for David Mayer is 1861465486, a Type 1 (individual) record in the CMS NPPES registry.

Anesthesiology Physician in Northampton, MA · enumerated 2006.

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

National Provider Identifier

1861465486

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Registry record

Entity type Individual (Type 1)

Name David N Mayer

Credential MD

Sex Male

Practice address 30 Locust St, Northampton, MA, 01060

Phone (413) 586-8443

Fax (413) 586-8443

Enumeration date Feb 13, 2006

Last updated in NPPES Mar 27, 2013

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 253202 (MA) Primary

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
253202	Other	MA	CONNECTICARE
122775	Other	MA	BMC HEALTHNET
07037741	Medicaid	CO	-
402861	Other	MA	TUFTS HEALTH PLAN
J50823	Other	MA	BCBS OF MASS
7258580	Other	MA	AETNA

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

What is the NPI number for David Mayer?

The National Provider Identifier (NPI) for David Mayer is 1861465486, a Type 1 (individual) record in the CMS NPPES registry.

Where does David Mayer practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-03-27.