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Ian R Neilson, M.D.

Pediatric Surgery Physician in Portland, ME · enumerated 2006.

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

National Provider Identifier

1447330410

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Registry record

Entity type Individual (Type 1)
Name Ian R Neilson
Credential M.D.
Sex Male
Practice address 887 Congress St, Suite 300, Portland, ME, 04102
Phone (207) 662-5555
Fax (207) 662-5526
Enumeration date Oct 16, 2006
Last updated in NPPES Nov 26, 2014

Taxonomy & licenses

2086S0120X Pediatric Surgery Physician Allopathic & Osteopathic Physicians · License 5423 (AK) Secondary
2086S0120X Pediatric Surgery Physician Allopathic & Osteopathic Physicians · License MD18028 (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
30208266 Medicaid NH -
433399099 Medicaid ME -
MD98332 Medicaid AK -

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

What specialty is Ian Neilson?
Ian Neilson is registered in NPPES with the primary taxonomy of Pediatric Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-11-26.