NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

James Steven Demer, MD

Psychiatry Physician in Alexandria Bay, NY · enumerated 2005.

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

National Provider Identifier

1891779849

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name James Steven Demer
Credential MD
Sex Male
Practice address 4 Fuller St, Alexandria Bay, NY, 13607
Phone (315) 482-2511
Fax (315) 482-5553
Enumeration date Dec 2, 2005
Last updated in NPPES Jan 15, 2016

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 233591-1 (NY) Primary
2084P0804X Child & Adolescent Psychiatry Physician Allopathic & Osteopathic Physicians · License 233591-1 (NY) 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
01648605 Medicaid NY -

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 James Demer practice?
The practice location on file with NPPES is in Alexandria Bay, NY. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for James Demer?
The National Provider Identifier (NPI) for James Demer is 1891779849, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-15.