Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Konwiser, M.D.

Specialist in Englewood, FL · enumerated 2005.

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

National Provider Identifier

1316930092

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Registry record

Entity type Individual (Type 1)

Name Mark Konwiser

Credential M.D.

Sex Male

Practice address 900 Pine St, Bldg 1 Ste 122/123, Englewood, FL, 34223

Phone (941) 474-8811

Fax (941) 473-0058

Enumeration date Aug 26, 2005

Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

174400000X Specialist Other Service Providers · License ME00050766 (FL) Primary

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
22-0003555	Other	FL	RAIL ROAD MEDICARE
85944	Other	FL	OCCUPATIONAL LICENSE
65-0596347	Other	FL	FEDERAL TAX #
10D0295356	Other	FL	CLIA #
ME00050766	Other	FL	FL LIC NUMBER

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

What specialty is Mark Konwiser?

Mark Konwiser is registered in NPPES with the primary taxonomy of Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.