Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Mary Kathryn O'Connor, MD

Individual provider Pediatrics Physician · NPI 1598119562

Dr. Mary Kathryn O'Connor, MD practises Internal Medicine in Newark, New Jersey. Qualified in 2016, 10 years ago. Practices with Rutgers Health-Rwj Primary Medicine Group, a 47-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New Jersey.

Years since qualifying
10
Licensed in
NJ
In the registry since
2016
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

150 Bergen St Internal Medicine-Pediatrics Residency Program Rm I248
Newark, NJ 07103-2496
Phone: (973) 972-6056
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 25MA10829300 (NJ)
Pediatrics Physician Taxonomy 208000000X · Licence 25MA10829300 (NJ)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1598119562
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 15, 2016
Last updated in NPPESJuly 23, 2021
Certification dateMay 17, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Also practisesPEDIATRIC MEDICINE
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice Rutgers Health-Rwj Primary Medicine Group — 47 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients74
Services billed 117 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Rutgers Health-Rwj Primary Medicine Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 47 clinicians in the practice; 12 are shown here.

Other providers in Newark