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NPI profile

W. L. SIEFERT

NPI record status, taxonomy, official source timestamp, and OIG LEIE screening context.

NPI record foundexcludedNPI API source

Identity

NPI
1437188521
Entity type
NPI-1
Primary taxonomy
207LP2900X
NPI source updated
Oct 28, 2019
Enumeration date
Jul 01, 2006
Cache fetched
May 05, 2026

NPI does not validate licensure, credentialing, Medicare enrollment, or current practice authority.

OIG LEIE screening

excludedConfidence: high

Exact OIG exclusion match by NPI.

WILLIAM SIEFERTExact OIG exclusion match by NPI.

NPI addresses

NPI addresses from the official registry record
PurposeAddressPhone
MAILING5024306223
LOCATION5024306223
Screen a CSVNPI and OIG data notes

FAQ

Practical notes

Does an NPI record validate licensure?

No. NPI data does not validate licensure, credentialing, Medicare enrollment, or current practice authority.