Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Sarah Elizabeth Mackinnon, OC(C), COMT

Orthoptist in Boston, MA · enumerated 2008.

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

National Provider Identifier

1295994317

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Registry record

Entity type Individual (Type 1)

Name Ms. Sarah Elizabeth Mackinnon

Credential OC(C), COMT

Sex Female

Practice address 300 Longwood Ave, Dept of Ophthalmology, Fegan 4, Boston, MA, 02115

Phone (617) 355-6845

Fax (617) 730-0392

Enumeration date Jun 4, 2008

Last updated in NPPES Jun 4, 2008

Taxonomy & licenses

156FX1900X Orthoptist Eye and Vision Services Providers 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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Sarah Mackinnon?

Sarah Mackinnon is registered in NPPES with the primary taxonomy of Orthoptist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-04.