Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory Scott Marmaduke, LBP

Counselor in Norman, OK · enumerated 2007.

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

National Provider Identifier

1609996743

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Registry record

Entity type Individual (Type 1)

Name Gregory Scott Marmaduke

Credential LBP

Sex Male

Practice address 900 E Main St Bldg 52, Norman, OK, 73071

Phone (405) 424-7711

Enumeration date Mar 30, 2007

Last updated in NPPES Oct 25, 2021

Taxonomy & licenses

171M00000X Case Manager/Care Coordinator Other Service Providers · License 0196 (OK) Secondary

101Y00000X Counselor Behavioral Health & Social Service Providers · License 0196 (OK) Primary

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 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 Gregory Marmaduke?

Gregory Marmaduke is registered in NPPES with the primary taxonomy of Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Scott Martinson Professional Counselor · Norman, OK NPI 1891961132 Shawn Templin Mental Health Counselor · Norman, OK NPI 1073764049 Melinda Lim Case Manager/Care Coordinator · Norman, OK NPI 1609297720 Tiffany Warrior Case Manager/Care Coordinator · Norman, OK NPI 1083000509 Michelle Stewart Licensed Practical Nurse · Norman, OK NPI 1629599204 Jazzmyn Roberts Mental Health Counselor · Norman, OK NPI 1861952012 Ekaette Atakpo Mental Health Counselor · Norman, OK NPI 1619530813 Deanna Cobbs Nurse's Aide · Norman, OK NPI 1972151413

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-25.