Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christopher M Geronsin, RPH

Pharmacist in Saint Louis, MO · enumerated 2009.

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

National Provider Identifier

1235371907

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Registry record

Entity type Individual (Type 1)

Name Christopher M Geronsin

Credential RPH

Sex Male

Practice address 7150 Natural Bridge Rd, Saint Louis, MO, 63121

Phone (314) 381-8600

Fax (314) 381-6844

Enumeration date Mar 27, 2009

Last updated in NPPES Mar 27, 2009

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 029703 (MO) Primary

RPH · Registered Pharmacist: A licensed pharmacist registered with a state board of pharmacy. About the RPH credential

Other identifiers

Identifier	Type	State	Issuer
600201206	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1235371907 active?

Yes, as of the latest NPPES snapshot, NPI 1235371907 is active (record last updated 2009-03-27).

How do I verify Christopher Geronsin's NPI record?

Cross-check NPI 1235371907 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-03-27.