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Individual
WILLIAM M KLEIN
Active
Individual
WILLIAM M KLEIN
Active
Sole proprietor
No
Provider details
NPI number
Gender
Man
Credential
MD
Taxonomy
Speciality
Code
Description
License number
State
207R00000X
Internal Medicine Physician
Primary
205508
NY
Other
Other identifiers
Code
Description
Identifier
Issuer
State
01
—
136958
VYTRA
—
01
—
205508
HIP
—
01
—
2594094
GHI
—
01
—
3651757
CIGNA
—
01
—
4C4799
HEALTHNET
—
01
—
A28929
1199
—
01
—
P3695174
OXFORD
—
01
—
WK07R53510
BLUE SHIELD
NY
Enumeration date
01/03/2006
Last updated
08/06/2026
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