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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Catherine Ann Miller-Simington, M.D.

Neurological Surgery Physician in Dubuque, IA · enumerated 2010.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1114244720

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Registry record

Entity type Individual (Type 1)
Name Dr. Catherine Ann Miller-Simington
Credential M.D.
Sex Female
Practice address Dubuque, IA, 52001
Phone (563) 557-5971
Fax (563) 557-5973
Enumeration date Apr 23, 2010
Last updated in NPPES Aug 25, 2022

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License A145218 (CA) Secondary
207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License 49883 (IA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What is the NPI number for Catherine Miller-Simington?
The National Provider Identifier (NPI) for Catherine Miller-Simington is 1114244720, a Type 1 (individual) record in the CMS NPPES registry.
Where does Catherine Miller-Simington practice?
The practice location on file with NPPES is in Dubuque, IA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-25.