Dr. Walker Elton Marsh Jr., PHD LMFT

Dr. Walker Elton Marsh Jr. is a Addiction (Substance Use Disorder) Counselor provider (Counselor) practicing in Slidell, LA, registered in the NPPES registry with NPI 1992895635 since 2006.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1992895635
Entity type	Individual (Type 1)
Name	Dr. Walker Elton Marsh Jr.
Credential	PHD LMFT
Sex	Male
Practice address	Slidell, LA, 70458
Phone	9856610560
Fax	9857815395
Enumeration date	2006-10-13
Last updated in NPPES	2025-09-11

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
101YA0400X	Addiction (Substance Use Disorder) Counselor	Primary	MFT-345	LA
101YM0800X	Mental Health Counselor	Secondary	MFT-345	LA
101YP1600X	Pastoral Counselor	Secondary	—	LA
106H00000X	Marriage & Family Therapist	Secondary	MFT-345	LA

Copy-ready billing details

Provider: Walker Marsh, PHD LMFT
NPI: 1992895635
Taxonomy: 101YA0400X (Addiction (Substance Use Disorder) Counselor)
Address: Slidell, LA, 70458

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1508807405	Gary Dragon	Individual	Physical Therapist	Slidell, LA
1114962917	Angie Deharde	Individual	Physical Therapist	Slidell, LA
1427084920	Superior Rehabilitation Services, LLC	Organization	Physical Therapy Clinic/Center	Slidell, LA
1689728958	Gertrude Parker	Individual	Occupational Therapist	Slidell, LA
1275731341	Parker Therapy Services, Inc.	Organization	Occupational Therapist	Slidell, LA
1780941559	Vicki Scanlan-Leishman	Individual	Clinical Social Worker	Slidell, LA
1093072761	Joy Naquin	Individual	Clinical Social Worker	Slidell, LA
1902235781	Alternative Practice Solutions LLC	Organization	Clinical Psychologist	Slidell, LA

Verify this record

Cross-check NPI 1992895635 against the authoritative CMS record: view Dr. Walker Elton Marsh Jr. on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

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.

What specialty is Walker Marsh?

Walker Marsh is registered in NPPES with the primary taxonomy of Addiction (Substance Use Disorder) Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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