Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Stephen P Cassis MD

Ophthalmology Physician in Charleston, WV · enumerated 2006 · authorized official Melisa Cassis, Office Manager.

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

National Provider Identifier

1770663866

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Registry record

Entity type Organization (Type 2)

Legal business name Stephen P Cassis MD

Practice address 301 49th St Se Ste A, Charleston, WV, 25304

Phone (304) 925-3937

Fax (304) 925-4336

Enumeration date Oct 16, 2006

Last updated in NPPES Oct 11, 2016

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers · License 2026-IOD1 (WV) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 12950 (WV) Primary

Authorized official

Name Melisa Cassis

Title Office Manager

Phone (304) 925-3937

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 is Stephen P Cassis MD located?

The practice location on file with NPPES is in Charleston, WV.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2016-10-11. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Andrew Cassis Optometrist · Charleston, WV NPI 1487103255

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-10-11.