Isaac O'Neal, M.D.
NPI 1598809626 · Internal Medicine Physician · Newark, NJ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isaac O'Neal, M.D. is a Internal Medicine Physician provider in Newark, NJ (NPI 1598809626).
Provider details
- NPI number
- 1598809626
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 25MA04217200 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 78 | 26 |
| Metformin Hcl | 69 | 25 |
| Pravastatin Sodium | 57 | 17 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 55 | 11 |
| Hydrochlorothiazide | 42 | 17 |
| Atorvastatin Calcium | 32 | 13 |
| Glipizidebrand: Glipizide Er |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$117 across 7 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-20
- Last updated
- 2013-03-18
Frequently asked questions
- What is Isaac O'Neal's NPI number?
- Isaac O'Neal's National Provider Identifier (NPI) is 1598809626, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isaac O'Neal's specialty?
- Isaac O'Neal is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Isaac O'Neal located?
- Isaac O'Neal's practice location on file with NPPES is 110 William St, Newark, NJ 07102-1304.
- What is Isaac O'Neal's phone number?
- The practice phone number listed in the NPPES registry for Isaac O'Neal is (973) 733-5300.
- Does Isaac O'Neal accept Medicare?
- Isaac O'Neal is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isaac O'Neal's NPI active?
- Yes — Isaac O'Neal's NPI (1598809626) is active in the NPPES registry as of the last update on 2013-03-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.