DR. MARY KATHRYN O'CONNOR M.D.
NPI 1598119562
Internal Medicine in Newark, NJ

Q: What is Mary O'connor's NPI number?

The NPI number for Mary O'connor is 1598119562. It was assigned to this individual provider in the NPPES registry on April 15, 2016.

Q: What is Mary O'connor's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Mary O'connor was last updated on July 23, 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.

Active since April 15, 2016PECOS EnrolledAccepts Medicare Assignment

93.71/100

CMS Quality Rating

150 BERGEN ST, INTERNAL MEDICINE-PEDIATRICS RESIDENCY PROGRAM RM I248, NEWARK, NJ 07103(973) 972-6056 Get Directions Write a Review

NPPES record last updated: July 23, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Dr. Mary Kathryn O'connor M.d. NPPES

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

DR. MARY KATHRYN O'CONNOR M.D. (NPI 1598119562) is an individual internal medicine provider in Newark, New Jersey, licensed in New Jersey (25MA10829300) and active in the NPI registry since April 2016. She is enrolled in Medicare PECOS, is affiliated with Robert Wood Johnson University Hospital, and is a graduate of Other (2016).

NPPES Registry Identity

NPI1598119562

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameDR. MARY KATHRYN O'CONNORCredential: M.D.

Location Address150 BERGEN ST, INTERNAL MEDICINE-PEDIATRICS RESIDENCY PROGRAM RM I248Newark, NJ 07103-2496

Mailing Address150 Bergen St, Internal Medicine-pediatrics Residency Program Rm I248Newark, NJ 07103-2496 · (973) 972-6056

Phone(973) 972-6056

Sole ProprietorNo

Medical School CMSOtherGraduated 2016

Enumeration DateApril 15, 2016

Last NPPES UpdateJuly 23, 2021

NPPES CertifiedMay 17, 2021

✔ NPI 1598119562 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in NJ · 25MA10829300

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Also ListedPediatricsTaxonomy 208000000X · License 25MA10829300 (NJ)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

150 BERGEN ST, Newark, NJ 07103

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, 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 and accepts Medicare assignment

Dr. Mary Kathryn O'connor M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3476956871

PECOS Enrollment IDI20210722002227

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 O'connor reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Rutgers Health-Rwj Primary Medicine Group

22 mi

Internal Medicine

1 ROBERT WOOD JOHNSON PL
New Brunswick, NJ 08901

Reassigned Medicare billing, New Jersey enrollment
125 clinicians in this Medicare group

NPI 1659475283 (732) 828-3000

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 moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

49 services34 patients

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.

35 services32 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

15 services15 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Robert Wood Johnson University Hospital

Acute Care Hospitals · New Brunswick, NJ

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number310038

LocationOne Robert Wood Johnson PlaceNew Brunswick, NJ 08901 · Middlesex County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 07103 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

$144.86 typical visit price

range $63.84 – $190.92

Typical copayment $36.21 (range $15.96 – $47.73)

Most-billed visit code 99204

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.

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.

93.71/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

77.79

Promoting Interoperability

100

Improvement Activities

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.

MR. ARIEL LIPPA, LPC, LCADC, NCC.

Counselor (Professional)