Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Argyro Sylvia Hatseras, M.D.

Critical Care Medicine (Internal Medicine) Physician in Milwaukee, WI · enumerated 2006.

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

National Provider Identifier

1194791871

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Registry record

Entity type Individual (Type 1)

Name Dr. Argyro Sylvia Hatseras

Credential M.D.

Sex Female

Practice address 945 N 12th St, Milwaukee, WI, 53233

Phone (414) 219-2000

Fax (414) 219-6161

Enumeration date Feb 23, 2006

Last updated in NPPES Nov 12, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036104244 (IL) Secondary

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 036104244 (IL) Secondary

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 036104244 (IL) Secondary

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 56385 (WI) 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
036104244	Medicaid	IL	-
P00446529	Other	IL	RR INDIVIDUAL
100017810	Medicaid	WI	-
833120	Other	IL	MEDICARE GROUP #
CA2264	Other	IL	RR GROUP
IL2613	Other	-	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1194791871 active?

Yes, as of the latest NPPES snapshot, NPI 1194791871 is active (record last updated 2024-11-12).

How do I verify Argyro Hatseras's NPI record?

Cross-check NPI 1194791871 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-11-12.