MARK JAMAL SAHYOUNI DO
NPI 1487458543
Internal Medicine in Columbia, SC

Q: What is the provider's specialty?

The provider's specialty is Internal Medicine with taxonomy code 207R00000X.

Active since April 01, 2025PECOS Enrolled

1801 SUNSET DR, COLUMBIA, SC 29203(803) 434-4153 Get Directions Write a Review

NPPES record last updated: July 17, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.

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About Mark Jamal Sahyouni Do NPPES

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

MARK JAMAL SAHYOUNI DO (NPI 1487458543) is an individual internal medicine provider in Columbia, South Carolina, licensed in South Carolina (LL93943) and active in the NPI registry since April 2025. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1487458543

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameMARK JAMAL SAHYOUNICredential: DO

Location Address1801 SUNSET DRColumbia, SC 29203-6803

Mailing Address1801 Sunset DrColumbia, SC 29203-6803

Phone(803) 434-4153

Sole ProprietorYes

Enumeration DateApril 1, 2025

Last NPPES UpdateJuly 17, 2025

NPPES CertifiedJuly 17, 2025

✔ NPI 1487458543 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in SC · LL93943

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

1801 SUNSET DR, Columbia, SC 29203

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark Jamal Sahyouni Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 29203 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$124.04 typical visit price

range $53.57 – $163.84

Typical copayment $31.01 (range $13.39 – $40.96)

Most-billed visit code 99204

Established Patient

$95.12 typical visit price

range $16.96 – $133.52

Typical copayment $23.78 (range $4.24 – $33.38)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.