MARK DEWITT LANYON PHD
NPI 1417008137
Counselor - Addiction (Substance Use Disorder) in Wilmington, DE

Q: What is Mark Lanyon's NPI number?

The NPI number for Mark Lanyon is 1417008137. It was assigned to this individual provider in the NPPES registry on January 16, 2007.

Q: What is Mark Lanyon's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

Q: Is Mark Lanyon enrolled in Medicare?

No. Mark Lanyon has opted out of Medicare through June 22, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

Q: When was this NPI record last updated?

The NPPES record for Mark Lanyon was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since January 16, 2007Opted out of Medicare · through Jun 22, 2028

2814 W 2ND ST, WILMINGTON, DE 19805(302) 472-0381(302) 472-0392 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: September 20, 2026.

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About Mark Dewitt Lanyon Phd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARK DEWITT LANYON PHD (NPI 1417008137) is an individual addiction (substance use disorder) provider in Wilmington, Delaware and active in the NPI registry since January 2007. He has opted out of Medicare through June 22, 2028.

NPPES Registry Identity

NPI1417008137

Entity TypeIndividualMale

Primary Taxonomy101YA0400X

Provider Legal NameMARK DEWITT LANYONCredential: PHD

Location Address2814 W 2ND STWilmington, DE 19805-1807

Mailing Address2814 W 2nd StWilmington, DE 19805-1807 · (302) 472-0381 · Fax (302) 472-0392

Phone(302) 472-0381

Fax(302) 472-0392

Sole ProprietorNo

Enumeration DateJanuary 16, 2007

Last NPPES UpdateSeptember 11, 2025

✔ NPI 1417008137 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers

Taxonomy Code101YA0400X

Also ListedPsychologist · Cognitive & BehavioralTaxonomy 103TB0200X

2814 W 2ND ST, Wilmington, DE 19805

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Other Identifiers 2

Medicaid1000024329DE

OtherPC002510PA · Prof Counselor License#

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Mark Dewitt Lanyon Phd has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from June 22, 2026 through June 22, 2028.

Opt-Out Effective DateJune 22, 2026

Opt-Out In Effect ThroughJune 22, 2028Opt-out affidavits renew automatically every two years unless cancelled

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JOSHUA M ELLOW

Counselor (Addiction (Substance Use Disorder))