Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mason Andrew Bentley Stillman

Psychiatry Physician in Berlin, VT · enumerated 2021.

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

National Provider Identifier

1346827078

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Registry record

Entity type Individual (Type 1)

Name Mason Andrew Bentley Stillman

Sex Male

Practice address 130 Fisher Rd, Berlin, VT, 05602

Phone (802) 371-4100

Enumeration date Mar 27, 2021

Last updated in NPPES Sep 1, 2023

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care · License R3753 (NH) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 042.0017159 (VT) Primary

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 Mason Stillman?

The National Provider Identifier (NPI) for Mason Stillman is 1346827078, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mason Stillman practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-09-01.