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Nathan Seigrist, DO
NPI 1780382465 · on the registry since 2023 · sole proprietor
Practice
- Address
- 3 Saint Elizabeth Blvd Ste 4000
O Fallon, IL 62269 - Phone
- (618) 256-9355
- Fax
- (618) 206-2332
- Organisation at this address
- Urology Of St. Louis, Inc.
Southern Illinois Healthcare Foundation Inc
St Elizabeths Hospital Of The Hospital Sisters Of The Third OrderInferred from a shared address, not stated in the registry. - Clinicians at this address
- 105
Registry record
- Primary taxonomy
- General Practice Physician
208D00000X
- Also registered as
- Military Health Care Provider
Student in an Organized Health Care Education/Training Program - Licence states on file
- IL, FL
From the registry's licence fields, which are often incomplete.
- Sex
- Male
- Record last updated
- 2026-06-24
Source: CMS National Plan and Provider Enumeration System. Registration is not the same as practising, and the registry records no retirement — some people listed here no longer practise. More in Illinois