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

Dr. Mark E. Elkinson, OD PA

Optometrist in South Portland, ME · enumerated 2006 · practices at Mark E. Elkinson, Od, PA.

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

National Provider Identifier

1336233931

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark E. Elkinson

Credential OD PA

Sex Male

Practice address South Portland, ME, 04106

Phone (207) 761-9054

Fax (207) 879-9003

Enumeration date Oct 3, 2006

Last updated in NPPES Nov 9, 2012

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

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License OPT758 (ME) Primary

Other identifiers

Identifier	Type	State	Issuer
120910000	Medicaid	ME	-

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 NPI 1336233931 active?

Yes, as of the latest NPPES snapshot, NPI 1336233931 is active (record last updated 2012-11-09).

How do I verify Mark Elkinson's NPI record?

Cross-check NPI 1336233931 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Mark E. Elkinson, Od, PA Optometrist · South Portland, ME NPI 1124364765

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-11-09.