Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexander Halstead Massey, M.D.

Pulmonary Disease Physician in Placerville, CA · enumerated 2006.

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

National Provider Identifier

1851463343

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Registry record

Entity type Individual (Type 1)

Name Alexander Halstead Massey

Credential M.D.

Sex Male

Practice address 1004 Fowler Way, Ste 4, Placerville, CA, 95667

Phone (530) 626-9488

Fax (530) 748-0320

Enumeration date Nov 14, 2006

Last updated in NPPES Feb 15, 2012

Taxonomy & licenses

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License G78874 (CA) Primary

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License G78874 (CA) Secondary

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

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1851463343 active?

Yes, as of the latest NPPES snapshot, NPI 1851463343 is active (record last updated 2012-02-15).

How do I verify Alexander Massey's NPI record?

Cross-check NPI 1851463343 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-15.