Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stacy L Walker, ARNP

Nurse Practitioner in Ottumwa, IA · enumerated 2006 · practices at Mercy Medical Center-Centerville.

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

National Provider Identifier

1821012188

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Stacy L Walker

Credential ARNP

Sex Female

Practice address 522 N Hancock St, Ottumwa, IA, 52501

Phone (641) 683-0800

Fax (641) 683-0801

Enumeration date Jul 27, 2006

Last updated in NPPES Jan 22, 2024

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License A087201 (IA) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License A087201 (IA) Primary

Other identifiers

Identifier	Type	State	Issuer
07389	Other	IA	WELLMARKIOWA
42146637605	Other	IA	RIVERVALLEYUHC
P00373615	Other	IA	RR MEDICARE

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 Stacy Walker?

Stacy Walker is registered in NPPES with the primary taxonomy of Nurse Practitioner. 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.

Other providers at this practice address

Browse all →

Susan Reynolds Family Nurse Practitioner · Ottumwa, IA NPI 1801889498 Robert Blommer Internal Medicine Physician · Ottumwa, IA NPI 1770569717 Peter Reiter Internal Medicine Physician · Ottumwa, IA NPI 1659350429 Brian Quinn Family Medicine Physician · Ottumwa, IA NPI 1023048626 Florita Henderson Internal Medicine Physician · Ottumwa, IA NPI 1770711939 Deborah Stephenson Family Nurse Practitioner · Ottumwa, IA NPI 1134443849 Chad Kelley Physical Therapist · Ottumwa, IA NPI 1528354974 Mary Henderson Family Nurse Practitioner · Ottumwa, IA NPI 1891079257

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-22.