NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Stephen O Chastain MD PC

Adult Medicine Physician in Methuen, MA · enumerated 2007 · authorized official Stephen Chastain, President.

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

National Provider Identifier

1053502153

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Stephen O Chastain MD PC
Practice address 33 Lawrence St, Methuen, MA, 01844
Phone (978) 683-3023
Fax (978) 691-5139
Enumeration date Aug 5, 2007
Last updated in NPPES Aug 5, 2007

Taxonomy & classification

207QA0505X Adult Medicine Physician Allopathic & Osteopathic Physicians · License 45089 (MA) Primary

Authorized official

Name Stephen Chastain
Title President
Phone (978) 683-4314

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 Stephen O Chastain MD PC?
NPPES lists Stephen Chastain (President) as the authorized official for this organization.
What is the NPI number for Stephen O Chastain MD PC?
The NPI for Stephen O Chastain MD PC is 1053502153, 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 2007-08-05.