Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark A. Speyer, MD

Hospice and Palliative Medicine (Internal Medicine) Physician in Winfield, IL · enumerated 2007.

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

National Provider Identifier

1649464488

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Registry record

Entity type Individual (Type 1)

Name Mark A. Speyer

Credential MD

Sex Male

Practice address 25 N Winfield Rd, Winfield, IL, 60190

Phone (630) 933-4847

Fax (630) 933-3826

Enumeration date Sep 5, 2007

Last updated in NPPES Jan 24, 2024

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 036119500 (IL) Secondary

207RH0002X Hospice and Palliative Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 036119500 (IL) Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036119500 (IL) 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
F400446455	Other	IL	MEDICARE INDIVIDUAL
206147	Other	IL	MEDICARE GROUP

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 Speyer?

Mark Speyer is registered in NPPES with the primary taxonomy of Hospice and Palliative Medicine (Internal Medicine) Physician. 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 2024-01-24.