Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. MARSHALL WHITSON WALKER JR. M.D.
NPI 1427011980
Pediatrics - Neonatal-Perinatal Medicine in Greenville, SC

Q: What is Marshall Walker's NPI number?

The NPI number for Marshall Walker is 1427011980. It was assigned to this individual provider in the NPPES registry on April 7, 2006.

Q: What is Marshall Walker's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.

Q: When was this NPI record last updated?

The NPPES record for Marshall Walker was last updated on June 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 59 days 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 April 07, 2006PECOS Enrolled

701 GROVE RD, DEPT. OF NEONATOLOGY, GREENVILLE HOSPITAL SYSTEM, GREENVILLE, SC 29605(864) 455-7939(864) 455-3685 Get Directions Write a Review

NPPES record last updated: June 12, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

On this page

About Dr. Marshall Whitson Walker Jr. M.d. NPPES

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

DR. MARSHALL WHITSON WALKER JR. M.D. (NPI 1427011980) is an individual neonatal-perinatal medicine provider in Greenville, South Carolina, licensed in South Carolina (017162) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1427011980

Entity TypeIndividualMale

Primary Taxonomy2080N0001X

Provider Legal NameDR. MARSHALL WHITSON WALKER JR.Credential: M.D.

Location Address701 GROVE RD, DEPT. OF NEONATOLOGY, GREENVILLE HOSPITAL SYSTEMGreenville, SC 29605-5611

Mailing Address12 Hollingsworth DrGreenville, SC 29607-3923 · (864) 414-0426

Phone(864) 455-7939

Fax(864) 455-3685

Sole ProprietorNo

Enumeration DateApril 7, 2006

Last NPPES UpdateJune 12, 2026

NPPES CertifiedJune 12, 2026

✔ NPI 1427011980 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Neonatal-Perinatal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code2080N0001X

License✔ Licensed in SC · 017162

Definition

A pediatrician who is the principal care provider for sick newborn infants. Clinical expertise is used for direct patient care and for consulting with obstetrical colleagues to plan for the care of mothers who have high-risk pregnancies.

701 GROVE RD, Greenville, SC 29605

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Other Identifiers 4

Medicaid171628SC

Medicaid7906185NC

Medicaid00777246BGA

Medicaid00777246CGA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Marshall Whitson Walker Jr. M.d. 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.

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.

ABDULLAH DARVESH

Internal Medicine

701 GROVE RD
GREENVILLE, SC 29605

Greenville County (864) 455-7882

DANIEL RUIZ

Internal Medicine

701 GROVE RD
GREENVILLE, SC 29605

Greenville County (864) 455-7882

ALAN ROBERT THOMPSON MD

Hospitalist

701 GROVE RD, 5TH FLOOR
GREENVILLE, SC 29605

Greenville County (864) 455-4411

GEORGE R SWEET CRNA

Nurse Anesthetist, Certified Registered

701 GROVE RD, ANESTHESIA DEPT
GREENVILLE, SC 29605

Greenville County (864) 455-7111

CRAIG DOUGLAS YOUNG PHD

Clinical Neuropsychologist

701 GROVE RD
GREENVILLE, SC 29605

Greenville County (864) 455-7000

JENNIFER WEBB GEORGE CRNA

Nurse Anesthetist, Certified Registered

701 GROVE RD
GREENVILLE, SC 29605

Greenville County (864) 455-7111

MEENU MARIE VARGHESE D.O.

Internal Medicine

701 GROVE RD, 5TH FLOOR SUPPORT TOWER
GREENVILLE, SC 29605

Greenville County (864) 455-7882

AMANDA TIPTON LARSON CRNA

Nurse Anesthetist, Certified Registered

701 GROVE RD
GREENVILLE, SC 29605

Greenville County (864) 522-2286

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 Marshall Walker's NPI number?

The NPI number for Marshall Walker is 1427011980. It was assigned to this individual provider in the NPPES registry on April 7, 2006.

Where is Marshall Walker located?

Marshall Walker practices at 701 Grove Rd Dept. Of Neonatology, Greenville Hospital System, Greenville, SC 29605. The listed phone number is (864) 455-7939.

What is Marshall Walker's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.

Is Marshall Walker enrolled in Medicare?

Yes. Marshall Walker is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Marshall Walker was last updated on June 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 59 days 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.