1. Home
  2. Directory
  3. South Carolina
  4. Charleston
  5. Family Medicine
  6. NPI Profile

ROSS MARNOCK DO
NPI 1154165488
Family Medicine in Charleston, SC

Active since June 21, 2024PECOS Enrolled
650 ELLIS OAK DR, CHARLESTON, SC 29412(843) 876-7080 Get Directions Write a Review

NPPES record last updated: December 8, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 8, 2025, Jun 21, 2024 (2 updates tracked since 2024).

About Ross Marnock Do NPPES

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

ROSS MARNOCK DO (NPI 1154165488) is an individual family medicine provider in Charleston, South Carolina, licensed in South Carolina (LL92472) and active in the NPI registry since June 2024. He is enrolled in Medicare PECOS and is a graduate of Other (2024).

NPPES Registry Identity

NPI1154165488
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameROSS MARNOCKCredential: DO
Location Address650 ELLIS OAK DRCharleston, SC 29412-3089
Mailing Address169 Ashley Avenuie Room 202 Main Hospital Msc 333Charleston, SC 29425-0001
Phone(843) 876-7080
Sole ProprietorNo
Medical School CMSOtherGraduated 2024
Enumeration DateJune 21, 2024
Last NPPES UpdateDecember 8, 20252 updates tracked since enumeration
NPPES CertifiedDecember 8, 2025
✔ NPI 1154165488 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in SC · LL92472
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Also ListedGeneral PracticeTaxonomy 208D00000X · License 92472 (SC)
650 ELLIS OAK DR, Charleston, SC 29412
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ross Marnock Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5799266680
PECOS Enrollment IDI20260227003492
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.

Medicare Billing Reassignment

Medicare enrollment records show Ross Marnock reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Signify Health Medical Associates, PLLC
981 mi
General Practice
4055 VALLEY VIEW LN STE 700
Dallas, TX 75244
  • Reassigned Medicare billing, South Carolina enrollment
  • 311 clinicians in this Medicare group
NPI 1750845863 (972) 715-3800

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 29412 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
$83.18 typical visit price
range $53.57 – $163.84
Typical copayment $20.79 (range $13.39 – $40.96)
Most-billed visit code 99203
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.

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.

MRS. SARAH AMY FOX MAURER
Physical Therapist (Orthopedic)
650 ELLIS OAK DR
CHARLESTON, SC 29412
Charleston County (843) 266-1540
HUYEN BUI MD
Family Medicine
650 ELLIS OAK DR
CHARLESTON, SC 29412
Charleston County (843) 792-3451
MARGARET ULMER GEE PT, MS
Specialist
650 ELLIS OAK DR
CHARLESTON, SC 29412
Charleston County (843) 266-1540
HANNAH LEIGH CHALFANT SMITH DO
Family Medicine
650 ELLIS OAK DR
CHARLESTON, SC 29412
Charleston County (843) 792-3451
WILSON FREDERICK FORD MD
Family Medicine
650 ELLIS OAK DR
CHARLESTON, SC 29412
Charleston County (843) 792-3451
KATHY BOLUS MD
Internal Medicine
650 ELLIS OAK DR
CHARLESTON, SC 29412
Charleston County (843) 762-5480
COURTNEY LINKOUS WALKER MD, MSCR
Family Medicine
650 ELLIS OAK DR
CHARLESTON, SC 29412
Charleston County (843) 792-3451
MICHAEL JEFFREY BARR PT
Physical Therapist
650 ELLIS OAK DR, MUSC PHYSICAL THERAPY
CHARLESTON, SC 29412
Charleston County (843) 266-1540

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 Ross Marnock's NPI number?

The NPI number for Ross Marnock is 1154165488. It was assigned to this individual provider in the NPPES registry on June 21, 2024.

Where is Ross Marnock located?

Ross Marnock practices at 650 Ellis Oak Dr, Charleston, SC 29412. The listed phone number is (843) 876-7080.

What is Ross Marnock's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Ross Marnock enrolled in Medicare?

Yes. Ross Marnock is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Ross Marnock's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ross Marnock reassigns Medicare benefits to Signify Health Medical Associates, PLLC (Dallas, TX). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Ross Marnock's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Ross Marnock was last updated on December 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.