Individual
DR. WILLIAM J RIESEN
Active
Sole proprietor
No
Provider details
NPI number
Gender
Man
Credential
MD
Contact information
Practice address
1010 4TH ST SW STE 305, MASON CITY, IA 50401-2801
(641) 428-5700
(641) 428-2515
Mailing address
621 S ILLINOIS AVE, SUITE 103, MASON CITY, IA 50401-5489
(641) 494-3041
(641) 494-3059
Taxonomy
Speciality
Code
Description
License number
State
207R00000X
Internal Medicine Physician
Primary
31260
IA
Other
Other identifiers
Code
Description
Identifier
Issuer
State
05
—
4137984
—
IA
01
—
46081
WELLMARK
IA
Enumeration date
08/23/2006
Last updated
07/14/2025
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