NPI Portal NPI Lookup & Verification

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

Mr. William Mark Schwing, C.P.O.

Prosthetic/Orthotic Supplier in Smithtown, NY · enumerated 2007 · practices at Dr Michael Kaplan Do PC.

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

National Provider Identifier

1326198441

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Registry record

Entity type Individual (Type 1)
Name Mr. William Mark Schwing
Credential C.P.O.
Sex Male
Practice address Smithtown, NY, 11787
Phone (631) 360-6400
Fax (631) 360-6449
Enumeration date Jan 11, 2007
Last updated in NPPES Jul 9, 2007

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

Taxonomy & licenses

335E00000X Prosthetic/Orthotic Supplier Suppliers Primary

Other identifiers

Identifier Type State Issuer
02192501 Medicaid NY -
A2669088 Other NY OXFORD PROVIDER ID
165811 Other NY VYTRA PROVIDER ID.
3C7870 Other NY HEALTHNET PROVIDER ID

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.

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Frequently asked questions

Where does William Schwing practice?
The practice location on file with NPPES is in Smithtown, NY. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Schwing?
The National Provider Identifier (NPI) for William Schwing is 1326198441, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.