Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gwendolyn Merchant, CRNP-PMH

Psychiatric/Mental Health Nurse Practitioner in Crofton, MD · enumerated 2011 · practices at Arundel Mental Health Professionals LLC.

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

National Provider Identifier

1578844601

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Registry record

Entity type Individual (Type 1)

Name Gwendolyn Merchant

Credential CRNP-PMH

Sex Female

Practice address 1662 Village Grn Ste 100, Crofton, MD, 21114

Phone (410) 757-2077

Enumeration date Sep 2, 2011

Last updated in NPPES Mar 12, 2025

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License RN578488 (PA) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License SP011515 (PA) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License SP011515 (PA) Secondary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License SPO27315 (PA) Secondary

363LP2300X Primary Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License SP011515 (PA) Secondary

363LP0808X Psychiatric/Mental Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License R263556 (MD) Primary

Other identifiers

Identifier	Type	State	Issuer
232212638	Medicaid	PA	-

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.

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Frequently asked questions

Is NPI 1578844601 active?

Yes, as of the latest NPPES snapshot, NPI 1578844601 is active (record last updated 2025-03-12).

How do I verify Gwendolyn Merchant's NPI record?

Cross-check NPI 1578844601 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Louis Woolard Clinical Social Worker · Crofton, MD NPI 1811971617 Andrea Griffin Psychologist · Crofton, MD NPI 1669630042 Delores Burrill Clinical Social Worker · Crofton, MD NPI 1750532461 Tarek Kronfli Psychologist · Crofton, MD NPI 1144575804 Tamela Pratt Psychiatric/Mental Health Nurse Practitioner · Crofton, MD NPI 1093051716 Tonya Logan Clinical Social Worker · Crofton, MD NPI 1538536149 Sarah Langham Psychiatric/Mental Health Nurse Practitioner · Crofton, MD NPI 1942668785 Michele Buchanan-Tyler Clinical Social Worker · Crofton, MD NPI 1255788691

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-12.