Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

George Frederick Sieffert, MD

Vascular Surgery Physician in Reno, NV · enumerated 2005.

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

National Provider Identifier

1598753725

Verified

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Registry record

Entity type Individual (Type 1)

Name George Frederick Sieffert

Credential MD

Sex Male

Practice address 1500 E 2nd Street, Suite 206, Reno, NV, 89502

Phone (775) 789-7000

Fax (775) 789-7040

Enumeration date Oct 11, 2005

Last updated in NPPES Nov 4, 2011

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 5079 (NV) Secondary

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 5079 (NV) 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
CC5338	Other	—	BCBS
XPY038360	Medicaid	CA	—
CC5338	Other	NV	ANTHEM BCBS
002016292	Medicaid	NV	—

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

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.

What specialty is George Sieffert?

George Sieffert is registered in NPPES with the primary taxonomy of Vascular Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-11-04.