NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Walter Lin, MD, MBA

Internal Medicine Physician in Saint Louis, MO · enumerated 2006.

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

National Provider Identifier

1952481913

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Walter Lin
Credential MD, MBA
Sex Male
Practice address 11500 Olive Blvd, Suite 235, Saint Louis, MO, 63141
Enumeration date Oct 16, 2006
Last updated in NPPES Jan 26, 2016

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A89450 (CA) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 2014018787 (MO) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1952481913 active?
Yes, as of the latest NPPES snapshot, NPI 1952481913 is active (record last updated 2016-01-26).
How do I verify Walter Lin's NPI record?
Cross-check NPI 1952481913 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-01-26.