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MRS. SANDY MARCHAS DUNCAN APRN
NPI 1255336103
Nurse Practitioner - Adult Health in Marietta, GA

Active since June 16, 2005PECOS Enrolled
90.8/100
CMS Quality Rating
55 WHITCHER ST NE, SUITE 350, MARIETTA, GA 30060(770) 424-6893(678) 819-0357 Get Directions Write a Review

NPPES record last updated: July 16, 2012. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Mrs. Sandy Marchas Duncan Aprn NPPES

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

MRS. SANDY MARCHAS DUNCAN APRN (NPI 1255336103) is an individual adult health provider in Marietta, Georgia, licensed in Georgia (149029) and active in the NPI registry since June 2005. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1255336103
Entity TypeIndividualFemale
Primary Taxonomy363LA2200X
Provider Legal NameMRS. SANDY MARCHAS DUNCANCredential: APRN
Location Address55 WHITCHER ST NE, SUITE 350Marietta, GA 30060-1155
Mailing Address55 Whitcher St Ne, Suite 350Marietta, GA 30060-1155 · (770) 424-6893 · Fax (678) 819-0357
Phone(770) 424-6893
Fax(678) 819-0357
Sole ProprietorNo
Enumeration DateJune 16, 2005
Last NPPES UpdateJuly 16, 2012
✔ NPI 1255336103 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Adult HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LA2200X
License✔ Licensed in GA · 149029
55 WHITCHER ST NE, Marietta, GA 30060
Open in Google Maps ↗

Other Names 1

Former Name (1)Sandy Marchas Joseph Aprn

Other Identifiers 3

Medicare PIN202I502755GA
Medicare UPINP78486GA
Medicaid000975653BGA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mrs. Sandy Marchas Duncan Aprn 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.

Medicare Billing Reassignment

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

Piedmont Cardiology Of Atlanta, LLC
14 mi
Cardiovascular Disease
275 COLLIER ROAD, SUITE 300
Atlanta, GA 30309
  • Reassigned Medicare billing, Georgia enrollment
  • 539 clinicians in this Medicare group
NPI 1275729691 (404) 605-2800

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 30060 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
$88.06 typical visit price
range $56.84 – $172.43
Typical copayment $22.01 (range $14.21 – $43.10)
Most-billed visit code 99203
Established Patient
$100.20 typical visit price
range $18.22 – $140.40
Typical copayment $25.05 (range $4.55 – $35.10)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

90.8/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Promoting Interoperability98
Improvement Activities20

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.

DR. ROBERT DAVID JANSEN M.D.
Internal Medicine (Nephrology)
55 WHITCHER ST NE, STE 460
MARIETTA, GA 30060
Cobb County (770) 427-7389
DR. MADHAVI JORDAN MD
Surgery
55 WHITCHER ST NE, SUIT 130
MARIETTA, GA 30060
Cobb County (770) 428-0462
MR. REYES TORRES III PA-C
Physician Assistant
55 WHITCHER ST NE, SUITE 350
MARIETTA, GA 30060
Cobb County (770) 424-6893
ASIF A SABERI M.D.
Internal Medicine (Critical Care Medicine)
55 WHITCHER ST NE, SUITE 160
MARIETTA, GA 30060
Cobb County (770) 422-1372
BRYAN T. PIEDAD M.D.
Internal Medicine (Clinical Cardiac Electrophysiology)
55 WHITCHER ST NE, SUITE 350
MARIETTA, GA 30060
Cobb County (770) 424-6893
MICHAEL J RILEY M.D.
Internal Medicine (Clinical Cardiac Electrophysiology)
55 WHITCHER ST NE, SUITE 350
MARIETTA, GA 30060
Cobb County (770) 424-6893
KAMARA SUZANNE HEARD ACNP
Nurse Practitioner (Acute Care)
55 WHITCHER ST NE
MARIETTA, GA 30060
Cobb County (770) 422-1372
JACLYN WOOD NP
Nurse Practitioner (Family)
55 WHITCHER ST NE, SUITE 250
MARIETTA, GA 30060
Cobb County (770) 428-4475

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 Sandy Duncan's NPI number?

The NPI number for Sandy Duncan is 1255336103. It was assigned to this individual provider in the NPPES registry on June 16, 2005. The provider is also known as Sandy Marchas Joseph Aprn.

Where is Sandy Duncan located?

Sandy Duncan practices at 55 Whitcher St NE Suite 350, Marietta, GA 30060. The listed phone number is (770) 424-6893.

What is Sandy Duncan's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Adult Health, with taxonomy code 363LA2200X.

Is Sandy Duncan enrolled in Medicare?

Yes. Sandy Duncan is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Sandy Duncan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sandy Duncan reassigns Medicare benefits to Piedmont Cardiology Of Atlanta, LLC (Atlanta, GA). 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 Sandy Duncan'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 Sandy Duncan was last updated on July 16, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years 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.