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MARK ALAN SIAR
NPI 1174476774
Counselor - Addiction (Substance Use Disorder) in Ridgeland, SC

Active since February 16, 2026
124 BOARDWALK DR STE A, RIDGELAND, SC 29936(843) 645-2770(843) 645-2771 Get Directions Write a Review

NPPES record last updated: February 16, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Mark Alan Siar NPPES

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

MARK ALAN SIAR (NPI 1174476774) is an individual addiction (substance use disorder) provider in Ridgeland, South Carolina and active in the NPI registry since February 2026.

NPPES Registry Identity

NPI1174476774
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameMARK ALAN SIAR
Location Address124 BOARDWALK DR STE ARidgeland, SC 29936-7994
Mailing Address124 Boardwalk Dr Ste ARidgeland, SC 29936-7994 · (843) 645-2770 · Fax (843) 645-2771
Phone(843) 645-2770
Fax(843) 645-2771
Sole ProprietorNo
Enumeration DateFebruary 16, 2026
NPPES CertifiedFebruary 16, 2026
✔ NPI 1174476774 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code101YA0400X
124 BOARDWALK DR STE A, Ridgeland, SC 29936
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Other Providers at the Same Location NPPES 8

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

DAVID GRAY CACP
Counselor (Addiction (Substance Use Disorder))
124 BOARDWALK DR STE A
RIDGELAND, SC 29936
Jasper County (843) 645-2770
SHEILA ANNE MCGRATH
Pharmacist
124 BOARDWALK DR STE A
RIDGELAND, SC 29936
Jasper County (843) 645-2770
SOUTH CAROLINA CTC, LLC
Clinic/Center (Methadone)
124 BOARDWALK DR STE A
RIDGELAND, SC 29936
Jasper County (760) 710-0968
KATHRYN VICTORIA FOLDS CO60904245
Counselor (Addiction (Substance Use Disorder))
124 BOARDWALK DR STE A
RIDGELAND, SC 29936
Jasper County (843) 645-2770
MRS. JESSICA CRUZ LPN
Licensed Practical Nurse
124 BOARDWALK DR STE A
RIDGELAND, SC 29936
Jasper County (843) 645-2770
RECOVERY CONCEPTS LLC
Clinic/Center (Methadone)
124 BOARDWALK DR STE A
RIDGELAND, SC 29936
Jasper County (843) 645-2770
MARCELLA MORALES
Counselor (Addiction (Substance Use Disorder))
124 BOARDWALK DR STE A
RIDGELAND, SC 29936
Jasper County (843) 645-2770
JARCELLA BURDEN
Counselor (Addiction (Substance Use Disorder))
124 BOARDWALK DR STE A
RIDGELAND, SC 29936
Jasper County (843) 645-2770

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Siar's NPI number?

The NPI number for Mark Siar is 1174476774. It was assigned to this individual provider in the NPPES registry on February 16, 2026.

Where is Mark Siar located?

Mark Siar practices at 124 Boardwalk Dr Ste A, Ridgeland, SC 29936. The listed phone number is (843) 645-2770.

What is Mark Siar's specialty?

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

When was this NPI record last updated?

The NPPES record for Mark Siar was last updated on February 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.