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MS. MARY JEANNE WILLIAMS ANP
NPI 1952414690
Nurse Practitioner - Adult Health in Spartanburg, SC

Active since August 16, 2006PECOS Enrolled
2995 REIDVILLE RD STE 100, SPARTANBURG, SC 29301(864) 587-3000(864) 587-3019 Get Directions Write a Review

NPPES record last updated: January 18, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 18, 2021, Nov 22, 2019, Mar 13, 2019 and 1 more (4 updates tracked since 2016).

About Ms. Mary Jeanne Williams Anp NPPES

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

MS. MARY JEANNE WILLIAMS ANP (NPI 1952414690) is an individual adult health provider in Spartanburg, South Carolina, licensed in South Carolina (17838) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and maintains a secondary practice location in Greenville.

NPPES Registry Identity

NPI1952414690
Entity TypeIndividualFemale
Primary Taxonomy363LA2200X
Provider Legal NameMS. MARY JEANNE WILLIAMSCredential: ANP
Location Address2995 REIDVILLE RD STE 100Spartanburg, SC 29301-5600
Mailing AddressPo Box 743070Atlanta, GA 30374-3070 · (864) 560-4304 · Fax (864) 560-4413
Phone(864) 587-3000
Fax(864) 587-3019
Sole ProprietorNo
Enumeration DateAugust 16, 2006
Last NPPES UpdateJanuary 18, 20214 updates tracked since enumeration
NPPES CertifiedJanuary 18, 2021
✔ NPI 1952414690 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 SC · 17838
2995 REIDVILLE RD STE 100, Spartanburg, SC 29301
Open in Google Maps ↗

Other Names 1

Former Name (1)Mrs. Mary Jeanne Greeder Anp

Secondary Practice Location 1

Location 1200 Patewood Dr, Suite B300Greenville, SC 29615-3593 · Phone (864) 454-4200

Other Identifiers 4

Medicaid083233OR
MedicaidNP3474SC
OtherSC69136067SC · Medicare Pin
OtherSC69136084SC · Medicare Pin

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Mary Jeanne Williams Anp 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 Mary Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Prisma Health University Medical Group
13 mi
Gynecology
3093 S HIGHWAY 14 STE 101
Greer, SC 29650
  • Reassigned Medicare billing, South Carolina enrollment
  • 3,281 clinicians in this Medicare group
NPI 1003619313 (864) 720-1900

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 29301 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.

Referred Medical Equipment & Supplies CMS DME claims 14

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tubing with integrated heating element for use with positive airway pressure device A4604
DME-Other DME · category DE001N
14 suppliers98 claims98 services$33.27 avg. paid by Medicare
Full face mask used with positive airway pressure device, each A7030
DME-Other DME · category DE001N
9 suppliers69 claims69 services$71.97 avg. paid by Medicare
Face mask interface, replacement for full face mask, each A7031
DME-Other DME · category DE001N
9 suppliers72 claims184 services$25.97 avg. paid by Medicare
Cushion for use on nasal mask interface, replacement only, each A7032
DME-Other DME · category DE001N
7 suppliers31 claims171 services$14.34 avg. paid by Medicare
Pillow for use on nasal cannula type interface, replacement only, pair A7033
DME-Other DME · category DE001N
8 suppliers23 claims130 services$12.88 avg. paid by Medicare
Nasal interface (mask or cannula type) used with positive airway pressure device, with or without head strap A7034
DME-Other DME · category DE001N
11 suppliers61 claims61 services$43.63 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 5

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

MS. ELIZABETH J YOUNGS NP
Nurse Practitioner (Family)
2995 REIDVILLE RD STE 100
SPARTANBURG, SC 29301
Spartanburg County (864) 587-3000
DEEPAK MALHAN M.D.
Family Medicine
2995 REIDVILLE RD STE 100
SPARTANBURG, SC 29301
Spartanburg County (864) 587-3000
SHERLEY BRITO FNP
Nurse Practitioner (Family)
2995 REIDVILLE RD STE 100
SPARTANBURG, SC 29301
Spartanburg County (864) 587-3000
SPARTANBURG MEDICAL CENTER
Clinic/Center (Urgent Care)
2995 REIDVILLE RD STE 100
SPARTANBURG, SC 29301
Spartanburg County (864) 587-3000
MARY BLACK HEALTH SYSTEM LLC
Family Medicine
2995 REIDVILLE RD STE 100
SPARTANBURG, SC 29301
Spartanburg County (864) 587-3000

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 Mary Williams's NPI number?

The NPI number for Mary Williams is 1952414690. It was assigned to this individual provider in the NPPES registry on August 16, 2006. The provider is also known as Mrs. Mary Jeanne Greeder Anp.

Where is Mary Williams located?

Mary Williams practices at 2995 Reidville Rd Ste 100, Spartanburg, SC 29301. The listed phone number is (864) 587-3000.

What is Mary Williams's specialty?

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

Is Mary Williams enrolled in Medicare?

Yes. Mary Williams is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mary Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Williams reassigns Medicare benefits to Prisma Health University Medical Group (Greer, SC). 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 Mary Williams'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 Mary Williams was last updated on January 18, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.