Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Cathy E Nieman, MD Inc

Organization Internal Medicine Physician · NPI 1588868327

Cathy E Nieman, MD Inc is an Internal Medicine Physician in Stillwater, Oklahoma. Licensed in Oklahoma. Registered with an NPI since 2007.

Licensed in
OK
In the registry since
2007
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

821 S Walnut St
Stillwater, OK 74074-4226
Phone: (405) 372-4646
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 20253 (OK)

Record details

NPI number1588868327
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Cathy Nieman — Medical Doctor · (405) 372-4646
Other names Cathy E Nieman, Md
NPI enumeratedJune 14, 2007
Last updated in NPPESNovember 3, 2008
Mailing address821 S Walnut St, Stillwater, OK 74074-4226

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