Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mary V Mason, MD

Q: What is the NPI number for Mary Mason?

The National Provider Identifier (NPI) for Mary Mason is 1093844540, a Type 1 (individual) record in the CMS NPPES registry.

General Practice Physician in Saint Louis, MO · enumerated 2007.

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

National Provider Identifier

1093844540

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Registry record

Entity type Individual (Type 1)

Name Dr. Mary V Mason

Credential MD

Sex Female

Practice address 4950 Childrens Pl, Wohl Medicine Clinic 5th Fl, Saint Louis, MO, 63110

Phone (314) 362-3500

Fax (314) 362-6959

Enumeration date Mar 2, 2007

Last updated in NPPES Jul 16, 2009

Taxonomy & licenses

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 106125 (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

What is the NPI number for Mary Mason?

The National Provider Identifier (NPI) for Mary Mason is 1093844540, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mary Mason practice?

The practice location on file with NPPES is in Saint Louis, MO. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-07-16.