Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mathilda Macmillan, LAC

Acupuncturist in Thousand Oaks, CA · enumerated 2024.

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

National Provider Identifier

1861261844

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mathilda Macmillan

Credential LAC

Sex Female

Practice address Thousand Oaks, CA, 91362

Phone (805) 603-4388

Enumeration date Jan 1, 2024

Last updated in NPPES Jan 1, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

171100000X Acupuncturist Other Service Providers · License AC19955 (CA) Primary

LAC · Licensed Acupuncturist: A practitioner licensed to perform acupuncture. About the LAC 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

How do I verify Mathilda Macmillan's NPI record?

Cross-check NPI 1861261844 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1861261844 active?

Yes, as of the latest NPPES snapshot, NPI 1861261844 is active (record last updated 2024-01-01).

Other providers at this practice address

Browse all →

Bruce Pendleberry Acupuncturist · Thousand Oaks, CA NPI 1841214707 Olivia Macmillan Acupuncturist · Thousand Oaks, CA NPI 1336971498

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-01.