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Dr. Erin Gwen Sieck, MD

Glaucoma Specialist (Ophthalmology) Physician in Saint Louis, MO · enumerated 2015 · practices at Mohamed Elsafi, DDS LLC.

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

National Provider Identifier

1649664129

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Registry record

Entity type Individual (Type 1)
Name Dr. Erin Gwen Sieck
Credential MD
Sex Female
Practice address 517 S Euclid Ave, Dept Opthalmology, 1st Fl, Saint Louis, MO, 63110
Phone (314) 362-3431
Fax (314) 362-6564
Enumeration date Mar 23, 2015
Last updated in NPPES Apr 17, 2025

Taxonomy & licenses

207WX0009X Glaucoma Specialist (Ophthalmology) Physician Allopathic & Osteopathic Physicians · License 2019014012 (MO) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
200069058 Medicaid MO -

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

Where does Erin Sieck practice?
The practice location on file with NPPES is in Saint Louis, MO. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Erin Sieck?
The National Provider Identifier (NPI) for Erin Sieck is 1649664129, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-17.