NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

John P Marino MD LLC

Internal Medicine Physician in Saint Louis, MO · enumerated 2010 · authorized official John Marino, Owner.

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

National Provider Identifier

1124359237

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name John P Marino MD LLC
Practice address 6651 Chippewa St, Suite 301, Saint Louis, MO, 63109
Phone (314) 842-5670
Fax (314) 842-2889
Enumeration date Jan 29, 2010
Last updated in NPPES Jan 29, 2010

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License R2C27 (MO) Primary

Authorized official

Name John Marino
Title Owner
Phone (314) 842-5670

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

Who is the authorized official for John P Marino MD LLC?
NPPES lists John Marino (Owner) as the authorized official for this organization.
What is the NPI number for John P Marino MD LLC?
The NPI for John P Marino MD LLC is 1124359237, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-01-29.