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Dr. David N Markellos, M.D.

Orthopaedic Surgery Physician in Biddeford, ME · enumerated 2006.

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

National Provider Identifier

1285678789

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Registry record

Entity type Individual (Type 1)
Name Dr. David N Markellos
Credential M.D.
Sex Male
Practice address 10 Wellspring Road, Biddeford, ME, 04005
Phone (207) 283-1126
Enumeration date Jun 15, 2006
Last updated in NPPES Nov 27, 2012

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 011960 (ME) Secondary
207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 011960 (ME) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
316980099 Medicaid ME -
1285678789 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

Where does David Markellos practice?
The practice location on file with NPPES is in Biddeford, ME. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for David Markellos?
The National Provider Identifier (NPI) for David Markellos is 1285678789, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-11-27.