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Dr Craig S Gustafson LLC

Family Medicine Physician in Ayer, MA · enumerated 2007 · authorized official Craig Gustafson, Owner.

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

National Provider Identifier

1982737946

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Registry record

Entity type Organization (Type 2)
Legal business name Dr Craig S Gustafson LLC
Practice address 190 Groton Rd, Ayer, MA, 01432
Phone (978) 772-0698
Fax (978) 772-0024
Enumeration date Mar 13, 2007
Last updated in NPPES Feb 10, 2026

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 153873 (MA) Primary

Authorized official

Name Craig Gustafson
Title Owner
Phone (978) 772-0698

Other identifiers

Identifier Type State Issuer
9740091 Medicaid MA -

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 a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Dr Craig S Gustafson LLC?
Dr Craig S Gustafson LLC is registered in NPPES as a Family Medicine Physician (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-10.