Individual
FERGUS E MCKIERNAN
Active
Sole proprietor
No
Provider details
NPI number
Gender
Man
Credential
MD
Taxonomy
Speciality
Code
Description
License number
State
207R00000X
Internal Medicine Physician
Primary
28261
WI
207RR0500X
Rheumatology Physician
28261
WI
Other
Other identifiers
Code
Description
Identifier
Issuer
State
05
—
30804100
—
WI
Enumeration date
09/25/2006
Last updated
09/11/2025
Update your record
If you believe information in your NPPES record is inaccurate, or if you wish to update or deactivate your NPI, you can do so directly with CMS at https://nppes.cms.hhs.gov.
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