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KAREN C WILLIS M.D.
NPI 1699830547
Pediatrics in Morristown, NJ

Active since December 22, 2006PECOS Enrolled
100 MADISON AVE, MORRISTOWN, NJ 07960(973) 971-7550(973) 290-2388 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 21, 2022, Aug 8, 2017 (2 updates tracked since 2017).

About Karen C Willis M.d. NPPES

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

KAREN C WILLIS M.D. (NPI 1699830547) is an individual pediatrics provider in Morristown, New Jersey, licensed in New Jersey (25MA10075700) and active in the NPI registry since December 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1699830547
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameKAREN C WILLISCredential: M.D.
Location Address100 MADISON AVEMorristown, NJ 07960-6136
Mailing AddressPo Box 416457Boston, MA 02241-6457 · (844) 362-1735 · Fax (973) 290-7495
Phone(973) 971-7550
Fax(973) 290-2388
Sole ProprietorNo
Enumeration DateDecember 22, 2006
Last NPPES UpdateJuly 21, 20222 updates tracked since enumeration
✔ NPI 1699830547 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in NJ · 25MA10075700
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
100 MADISON AVE, Morristown, NJ 07960
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Other Identifiers 1

Medicaid2661196OH

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Antidote Health Plan of Ohio, Inc., Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Karen C Willis 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.

Medicare Billing Reassignment

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

Children's Hospital Medical Center Of Akron
325 mi
Anesthesiology
6505 MARKET ST
Boardman, OH 44512
  • Reassigned Medicare billing, Ohio enrollment
  • 559 clinicians in this Medicare group
NPI 1417257601 (330) 746-8700

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 07960 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.

MELISSA LOPES M.D
Anesthesiology
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (201) 943-5831
MORRISTOWN MEMORIAL HOSPITAL
General Acute Care Hospital
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (888) 250-9947
VINCENT MAIXNER LCSW
Social Worker (Clinical)
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (973) 971-5000
MEGAN LYNN CATHEY NP-C
Nurse Practitioner (Adult Health)
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (973) 971-5358
ANTHONY RIZZUTI
Nurse Anesthetist, Certified Registered
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (800) 991-9133
OMAR MOHAMMED ABDELFATTAH MBBCH
Student in an Organized Health Care Education/Training Program
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (973) 971-5000
ALEXANDER CASCAIS MD
Student in an Organized Health Care Education/Training Program
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (973) 971-5000
DEVEA RANI DE MD
Student in an Organized Health Care Education/Training Program
100 MADISON AVE
MORRISTOWN, NJ 07960
Morris County (973) 971-5000

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 Karen Willis's NPI number?

The NPI number for Karen Willis is 1699830547. It was assigned to this individual provider in the NPPES registry on December 22, 2006.

Where is Karen Willis located?

Karen Willis practices at 100 Madison Ave, Morristown, NJ 07960. The listed phone number is (973) 971-7550.

What is Karen Willis's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Karen Willis enrolled in Medicare?

Yes. Karen Willis is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Karen Willis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karen Willis reassigns Medicare benefits to Children's Hospital Medical Center Of Akron (Boardman, OH). 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 Karen Willis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Karen Willis accept?

Health plans from Anthem Blue Cross and Blue Shield, Antidote Health Plan of Ohio, Inc. and Oscar Health list Karen Willis as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Karen Willis was last updated on July 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.