Anthonia Onyemem
NPI 1891460127 · Adult Health Nurse Practitioner · Stony Brook, NY
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Anthonia Onyemem is a Adult Health Nurse Practitioner provider in Stony Brook, NY (NPI 1891460127).
Provider details
- NPI number
- 1891460127
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 310314 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
4 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
201 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 79 | $91 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 71 | $126 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 27 | $108 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 24 | $168 |
Typical Medicare-allowed amounts for these services range $91–$168 (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 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 124 | 32 |
| Atorvastatin Calcium | 79 | 20 |
| Lisinopril | 71 | 18 |
| Omeprazole | 65 | 17 |
| Simvastatin | 64 | 17 |
| Famotidine | 39 | — |
| Amlodipine Besylate | 36 | 13 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$42 across 1 record (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
Additional practice locations (2)
- 159 Carleton AveCentral Islip, NY 11722-4172Phone: (631) 650-2510
- 75 N Country RdPort Jefferson, NY 11777-2119Phone: (631) 473-1320
Registry dates
- Enumerated
- 2021-08-10
- Last updated
- 2022-06-30
- Certified
- 2022-06-30
Frequently asked questions
- What is Anthonia Onyemem's NPI number?
- Anthonia Onyemem's National Provider Identifier (NPI) is 1891460127, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Anthonia Onyemem's specialty?
- Anthonia Onyemem is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Anthonia Onyemem located?
- Anthonia Onyemem's practice location on file with NPPES is 101 Nicolls Rd, Stony Brook, NY 11794-4172.
- What is Anthonia Onyemem's phone number?
- The practice phone number listed in the NPPES registry for Anthonia Onyemem is (631) 444-2981.
- Does Anthonia Onyemem accept Medicare?
- Anthonia Onyemem is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Anthonia Onyemem's NPI active?
- Yes — Anthonia Onyemem's NPI (1891460127) is active in the NPPES registry as of the last update on 2022-06-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.