Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mainestream Health Co. LLC

Q: What type of organization is Mainestream Health Co. LLC?

Mainestream Health Co. LLC is registered in NPPES as a Chiropractor (its primary provider taxonomy).

Chiropractor in Gray, ME · enumerated 2023 · authorized official William Bartlett, Owner.

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

National Provider Identifier

1578347373

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Mainestream Health Co. LLC

Practice address 15 Main St Ste 6, Gray, ME, 04039

Phone (207) 317-6770

Enumeration date Aug 22, 2023

Last updated in NPPES Aug 22, 2023

Taxonomy & classification

111N00000X Chiropractor Chiropractic Providers Primary

171100000X Acupuncturist Other Service Providers Secondary

Authorized official

Name William Bartlett

Title Owner

Phone (207) 317-6770

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 type of organization is Mainestream Health Co. LLC?

Mainestream Health Co. LLC is registered in NPPES as a Chiropractor (its primary provider taxonomy).

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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-22.