Margaret Z. Kozak, DO
Family Medicine Physician · Newton, NJ
Margaret Z. Kozak, DO is a family medicine physician with a practice address in Newton, New Jersey, and NPI 1891781720, issued on Sep 26, 2005. Check the license (New Jersey 25MB06962100, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Margaret Z. Kozak
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 25MB06962100 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 135 Newton Sparta RD, Newton, NJ 07860
- Phone
- (973) 579-1000
- Enumerated
- Sep 26, 2005
- Record last updated
- Oct 20, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (973) 579-3571
- Medicaid ID
- 8030502 NJ
- Medicare enrollment
- Enrolled (PECOS I20240701000580); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,770 in New Jersey → Look up another NPI →
Also registered at 135 Newton Sparta RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Judith DespiritoMidwife1033184494
- Diane HingstonHearing Instrument Specialist1396989620
- Frieda Lewis, MDSpecialist1588692909
- John McGraw, MDFamily Medicine Physician1114913068
- Brian Newman, MDSurgery Physician1053399147
Verify Margaret Z. Kozak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MB06962100Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average family medicine physician in 2024
3,560 Medicare Part D claims for 766 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 53 claims were for opioids.
Most prescribed
- Levothyroxine Sodium222 claims
- Rosuvastatin Calcium179 claims
- Metformin Hcl136 claims
- Amlodipine Besylate131 claims
- Atorvastatin Calcium115 claims
- Fluticasone Propionate105 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 82 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $321.35
10 payments; by number, the most common kind was food and beverage; the largest payer was RefleXion Medical, Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Northern Arizona Healthcare CorporationFlagstaff, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret Z. Kozak among 2,770 family medicine physician records in New Jersey
Margaret Z. Kozak, DO is one of 2,770 family medicine physician records with a practice address in New Jersey. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1996 · median 2006 among the 1,875 with a school on file
- Record last updated2011 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
12 family medicine physician records list a practice address in Newton
They are 12 of the 503 NPPES records with a practice address in Newton, and 2,770 family medicine physician records in New Jersey.
All 2,770 in New Jersey → Every provider in Newton → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Shumaila Alam, M.D.Newton, NJ 078601851732143
- Osbin Alvarado Herrera, MDNewton, NJ 078601871159715
- Frank Kane, M.D.Newton, NJ 078601154390540
- Ken Kinoshita, MDNewton, NJ 078601801059258
- Peter Liloia, D.O.Newton, NJ 078601962601872
- David Mattes, MDNewton, NJ 078601336188473
- John McGraw, MDNewton, NJ 078601114913068
- Eric Murch, DONewton, NJ 078601497203004
Common questions
What is Margaret Z. Kozak, DO's NPI number?
Margaret Z. Kozak, DO's National Provider Identifier (NPI) is 1891781720, issued on Sep 26, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Z. Kozak, DO located?
The NPPES record lists a practice address at 135 Newton Sparta RD, Newton, NJ, 07860. Phone: (973) 579-1000. Providers update this record themselves, so call before visiting.
How can I verify Margaret Z. Kozak, DO's license?
NPPES lists New Jersey license number 25MB06962100, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Margaret Z. Kozak, DO prescribe under Medicare Part D?
In 2024, Margaret Z. Kozak, DO had 3,560 Medicare Part D claims for 766 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Margaret Z. Kozak, DO's MIPS final score?
The 2023 MIPS final score is 82 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.