Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine E Oconnor, MD

Surgery Physician in Lewiston, ME · enumerated 2006.

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

National Provider Identifier

1134189434

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Registry record

Entity type Individual (Type 1)

Name Catherine E Oconnor

Credential MD

Sex Female

Practice address 99 Campus Ave., Suite 401, St Mary'S Surgical Associates, Lewiston, ME, 04240

Phone (207) 777-8650

Fax (207) 777-8641

Enumeration date Mar 23, 2006

Last updated in NPPES Sep 29, 2025

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 60277802 (NY) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 76180 (MA) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 036158770 (IL) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License MD17051 (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
76180	Other	MA	MEDICAL LICENSE
017051	Other	ME	MEDICAL LICENSE
60277802	Other	NY	MEDICAL LICENSE

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 Catherine Oconnor?

Catherine Oconnor is registered in NPPES with the primary taxonomy of 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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-29.