Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

G. Eric Geslien, MD

Diagnostic Radiology Physician in Manchester, NH · enumerated 2006.

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

National Provider Identifier

1114964038

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Registry record

Entity type Individual (Type 1)

Name G. Eric Geslien

Credential MD

Sex Male

Practice address 100 Hitchcock Way, Manchester, NH, 03104

Phone (603) 629-1877

Fax (603) 695-2856

Enumeration date May 31, 2006

Last updated in NPPES Jun 21, 2011

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 7497 (NH) Primary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License G26867 (CA) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License ME86091 (FL) Secondary

2085U0001X Diagnostic Ultrasound Physician Allopathic & Osteopathic Physicians · License 216622 (MA) Secondary

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
80000547	Medicaid	NH	-

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

What specialty is G. Geslien?

G. Geslien is registered in NPPES with the primary taxonomy of Diagnostic Radiology 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 2011-06-21.