Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Spencer Lee Haller, M.D.

Internal Medicine Physician in Wilbraham, MA · enumerated 2007.

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

National Provider Identifier

1679787535

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Registry record

Entity type Individual (Type 1)

Name Dr. Spencer Lee Haller

Credential M.D.

Sex Male

Practice address 70 Post Office Park, Wilbraham, MA, 01095

Phone (413) 598-7770

Fax (413) 599-1399

Enumeration date May 10, 2007

Last updated in NPPES Mar 17, 2011

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 222039 (MA) Primary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 222039 (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
110079183A	Medicaid	MA	-

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 1679787535 active?

Yes, as of the latest NPPES snapshot, NPI 1679787535 is active (record last updated 2011-03-17).

How do I verify Spencer Haller's NPI record?

Cross-check NPI 1679787535 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 2011-03-17.