Mary O'Connor, M.D.
NPI 1598119562 · Internal Medicine Physician · Newark, NJ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary O'Connor, M.D. is a Internal Medicine Physician provider in Newark, NJ (NPI 1598119562).
Provider details
- NPI number
- 1598119562
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 25MA10829300 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
99 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 49 | $135 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 35 | $97 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 15 | $146 |
Typical Medicare-allowed amounts for these services range $97–$146 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 75 | 24 |
| Amlodipine Besylate | 62 | 17 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 39 | 15 |
| Gabapentin | 39 | — |
| Pantoprazole Sodium | 34 | — |
| Metformin Hcl | 33 | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-04-15
- Last updated
- 2021-07-23
- Certified
- 2021-05-17
Frequently asked questions
- What is Mary O'Connor's NPI number?
- Mary O'Connor's National Provider Identifier (NPI) is 1598119562, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary O'Connor's specialty?
- Mary O'Connor is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary O'Connor located?
- Mary O'Connor's practice location on file with NPPES is 150 Bergen St, Newark, NJ 07103-2496.
- What is Mary O'Connor's phone number?
- The practice phone number listed in the NPPES registry for Mary O'Connor is (973) 972-6056.
- Does Mary O'Connor accept Medicare?
- Mary O'Connor is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary O'Connor's NPI active?
- Yes — Mary O'Connor's NPI (1598119562) is active in the NPPES registry as of the last update on 2021-07-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.