Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nancy Collins O'Brien, MD

Pediatric Hematology & Oncology Physician in Ottumwa, IA · enumerated 2005.

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

National Provider Identifier

1770576373

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Registry record

Entity type Individual (Type 1)

Name Nancy Collins O'Brien

Credential MD

Sex Female

Practice address Ottumwa Pediatrics, 931 Pennsylvania Ave, Ottumwa, IA, 52501

Phone (641) 684-3000

Fax (641) 684-2469

Enumeration date Aug 30, 2005

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 29316 (IA) Secondary

2080P0207X Pediatric Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 29316 (IA) 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
42068106032	Other	IA	JOHN DEERE HEALTH
0098012	Medicaid	IA	-
G004	Other	IA	TRIWEST
37875	Other	IA	IOWA HEALTH SOLUTIONS
51222	Other	IA	WELLMARK INC BCBS OF IA

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

Is NPI 1770576373 active?

Yes, as of the latest NPPES snapshot, NPI 1770576373 is active (record last updated 2025-09-11).

How do I verify Nancy O'Brien's NPI record?

Cross-check NPI 1770576373 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.