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

Robert Allan Calhoun, MD

Specialist in Saratoga Springs, NY · enumerated 2006.

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

National Provider Identifier

1558423855

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Registry record

Entity type Individual (Type 1)

Name Robert Allan Calhoun

Credential MD

Sex Male

Practice address Saratoga Springs, NY, 12866

Phone (518) 583-8442

Enumeration date Dec 14, 2006

Last updated in NPPES Oct 16, 2007

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

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 133135-1 (NY) Primary

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

Where does Robert Calhoun practice?

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

What is the NPI number for Robert Calhoun?

The National Provider Identifier (NPI) for Robert Calhoun is 1558423855, 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 2007-10-16.