1. Home
  2. Directory
  3. New Jersey
  4. East Orange
  5. Family Medicine
  6. NPI Profile

DR. MARIEGRACE WITHAM D.O.
NPI 1164496519
Family Medicine in East Orange, NJ

Active since February 14, 2006PECOS Enrolled
385 TREMONT AVE, EAST ORANGE, NJ 07018(973) 676-1000 Get Directions Write a Review

NPPES record last updated: February 1, 2019. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Feb 1, 2019, Nov 1, 2016 (2 updates tracked since 2016).

About Dr. Mariegrace Witham D.o. NPPES

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

DR. MARIEGRACE WITHAM D.O. (NPI 1164496519) is an individual family medicine provider in East Orange, New Jersey, licensed in New Jersey (25MB06436600) and active in the NPI registry since February 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1164496519
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameDR. MARIEGRACE WITHAMCredential: D.O.
Location Address385 TREMONT AVEEast Orange, NJ 07018-1023
Mailing Address5 Mcdonough StMontclair, NJ 07042-4210 · (973) 509-8256
Phone(973) 676-1000
Sole ProprietorNo
Enumeration DateFebruary 14, 2006
Last NPPES UpdateFebruary 1, 20192 updates tracked since enumeration
✔ NPI 1164496519 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in NJ · 25MB06436600
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.
385 TREMONT AVE, East Orange, NJ 07018
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)

Dr. Mariegrace Witham D.o. 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 Reassignments

2

Medicare enrollment records show Mariegrace Witham reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Drx Paramus, LLC
17 mi
Urgent Care
67 E RIDGEWOOD AVE, UNIT C
Paramus, NJ 07652
  • Reassigned Medicare billing, New Jersey enrollment
  • 144 clinicians in this Medicare group
NPI 1316272685 (201) 262-2010
The Radiology Group Of New Jersey, LLC
31 mi
Multi-Specialty
651 WILLOW GROVE ST
Hackettstown, NJ 07840
  • Reassigned Medicare billing, New Jersey enrollment
  • 429 clinicians in this Medicare group
NPI 1174010540 (908) 979-1621

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

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
31 services31 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
17 services17 patients
Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) 87811
This is a test to detect COVID-19, the virus causing severe respiratory illness. It uses a method called immunoassay, which identifies the virus by its unique proteins. The test is directly observed for accuracy. It helps determine if you're currently infected.
15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 07018 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
$98.09 typical visit price
range $63.84 – $190.92
Typical copayment $24.52 (range $15.96 – $47.73)
Most-billed visit code 99203
Established Patient
$111.57 typical visit price
range $20.97 – $155.92
Typical copayment $27.89 (range $5.24 – $38.98)
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. GWENDOLYN CARMEL RVT
Specialist/Technologist Cardiovascular (Vascular Specialist)
385 TREMONT AVE, 112
EAST ORANGE, NJ 07018
Essex County (973) 676-1000
EBONY MARIE HAWKES LPN
Licensed Practical Nurse
385 TREMONT AVE
EAST ORANGE, NJ 07018
Essex County (973) 676-1000
KATHLEEN HODGKISS PHD
Psychologist (Clinical)
385 TREMONT AVE
EAST ORANGE, NJ 07018
Essex County (973) 676-1000
MISS HANA MICHELE BARON NP, RN
Nurse Practitioner (Family)
385 TREMONT AVE
EAST ORANGE, NJ 07018
Essex County (973) 676-1000
MRS. CARLA FRANCIS APN
Nurse Practitioner (Adult Health)
385 TREMONT AVE
EAST ORANGE, NJ 07018
Essex County (973) 676-1000
DR. BINCY J PETER
Pharmacist
385 TREMONT AVE
EAST ORANGE, NJ 07018
Essex County (973) 676-1000
LINDA A WOLF PA-C
Physician Assistant (Surgical)
385 TREMONT AVE
EAST ORANGE, NJ 07018
Essex County (973) 676-1000
EAST ORANGE VAMC
Department of Veterans Affairs (VA) Pharmacy
385 TREMONT AVE
EAST ORANGE, NJ 07018
Essex County (973) 676-1000

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 Mariegrace Witham's NPI number?

The NPI number for Mariegrace Witham is 1164496519. It was assigned to this individual provider in the NPPES registry on February 14, 2006.

Where is Mariegrace Witham located?

Mariegrace Witham practices at 385 Tremont Ave, East Orange, NJ 07018. The listed phone number is (973) 676-1000.

What is Mariegrace Witham's specialty?

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

Is Mariegrace Witham enrolled in Medicare?

Yes. Mariegrace Witham is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mariegrace Witham's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mariegrace Witham reassigns Medicare benefits to 2 organizations: Drx Paramus, LLC (Paramus, NJ) and The Radiology Group Of New Jersey, LLC (Hackettstown, NJ). Each 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 Mariegrace Witham'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 Mariegrace Witham was last updated on February 1, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.