Margaret Z. Kozak, DO
NPI 1891781720ActiveIndividual· Family Medicine· Newton, NJ
Family Medicine (DO) with Northern Arizona Healthcare Corporation, practicing in Newton, New Jersey. 664 Medicare patients in 2024, $123,126 paid; nearly all of their 3,560 Part D prescriptions were generic (91%). Amgen Inc. was the largest of 10 companies reporting payments in 2025, $483.33 in all, mostly food and beverage. Lists Flagstaff Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1891781720 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Sep 26, 2005 |
| Last updated in NPPES | Oct 20, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 25MB06962100 | NJ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Family Practice (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 664 |
|---|---|
| Services billed | 1,991 across 52 procedure codes |
| Paid by Medicare | $123,126 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,560 · 6,802 30-day fills |
|---|---|
| Patients | 766 |
| Total drug cost | $155,797 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 1996 |
|---|---|
| Medicare specialty | Family Practice |
| Telehealth | Offers telehealth |
Medical group
- Northern Arizona Healthcare CorporationFlagstaff, AZ · 385 clinicians
Hospital affiliations
- Flagstaff Medical CenterFlagstaff, AZ
- Verde Valley Medical CenterCottonwood, AZ
Other facilities
- Angels Care Home Health of ArizonaHome health agency · Cottonwood, AZ
- Centerwell Home HealthHome health agency · Prescott, AZ
- Maggie's Home Health LLCHome health agency · Cottonwood, AZ
- Northern Arizona Home HealthHome health agency · Cottonwood, AZ
- Nurses Network By Quality Home Health CareHome health agency · Prescott Valley, AZ
Industry payments (Open Payments)
- 2025$483.33 · 26 payments from 10 companies
- 2024$321.35 · 10 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $139.69 | 8 |
| Exact Sciences Corporation | $78.19 | 4 |
| Astrazeneca Pharmaceuticals LP | $64.34 | 4 |
| Pfizer Inc. | $42.28 | 2 |
| Lilly USA, LLC | $32.78 | 2 |
What the 2025 payments were for
- Food and Beverage$483.33 · 26 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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