Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Gretchen L Trendel, APRN

Psychiatric/Mental Health Clinical Nurse Specialist in Ottawa, KS · enumerated 2005.

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

National Provider Identifier

1336133032

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Registry record

Entity type Individual (Type 1)

Name Ms. Gretchen L Trendel

Credential APRN

Sex Female

Practice address 2537 Eisenhower Rd, Ottawa, KS, 66067

Phone (785) 242-3780

Fax (785) 242-6397

Enumeration date Sep 8, 2005

Last updated in NPPES Apr 5, 2012

Taxonomy & licenses

364SP0808X Psychiatric/Mental Health Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License APRN 53-74781-071 (KS) Primary

APRN · Advanced Practice Registered Nurse: An umbrella credential covering NPs, CRNAs, CNMs, and clinical nurse specialists. About the APRN credential

Other identifiers

Identifier	Type	State	Issuer
160705	Other	KS	MEDICARE
100422100A	Medicaid	KS	-

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 Gretchen Trendel?

Gretchen Trendel is registered in NPPES with the primary taxonomy of Psychiatric/Mental Health Clinical Nurse Specialist. 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

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Robin Burgess Clinical Social Worker · Ottawa, KS NPI 1235162496 Elizabeth Layton Center, Inc. Mental Health Clinic/Center (Including Community Mental Health Center) · Ottawa, KS NPI 1649296757 Gerald Gambrill Psychiatry Physician · Ottawa, KS NPI 1982620019 Shani Mccurry Mental Health Counselor · Ottawa, KS NPI 1063438802 Peggy Southard Marriage & Family Therapist · Ottawa, KS NPI 1558389908 Jacqueline Cunningham Psychiatric/Mental Health Nurse Practitioner · Ottawa, KS NPI 1851310767 Diane Drake Psychiatric/Mental Health Clinical Nurse Specialist · Ottawa, KS NPI 1780786533 John Troutman Clinical Social Worker · Ottawa, KS NPI 1154411361

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-04-05.