2026 NPPES data Radiation Oncology Physician NPI 1083091235 M.D.
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MALGORZATA KOZAK, M.D.

Radiation Oncology Physician in IOWA CITY, Iowa. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
29
Medicare Part D claims · 15 beneficiaries · Radiation Oncology Physician avg: 186

What the federal data shows

MALGORZATA KOZAK, M.D. filed 29 Medicare Part D claims in 2023 as a Radiation Oncology Physician in IOWA CITY, Iowa.

29
Part D claims, 2023
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

MALGORZATA KOZAK, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

29 0th percentile higher than 0% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

MALGORZATA KOZAK, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about MALGORZATA KOZAK, M.D.?

Quality data not reported

NPI registry status

Active

Issued 04/27/2015

NPI 1083091235

Primary specialty

Radiation Oncology Physician

Mid-sized

6,018 US NPIs in this specialty

Medicare Part D claims

29 84% vs specialty avg

2023 prescription claims

Specialty avg: 186

Specialty distribution in Iowa

How Radiation Oncology Physician compares to other specialties among Iowa providers

Iowa providers

Radiation Oncology Physician share within Iowa

1. Radiation Oncology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Radiation Oncology Physician share within Iowa

Specialty board-certification context

Estimated specialty board-certified rate — Radiation Oncology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Radiation Oncology Physician ABMS/AOA estimate

Est. board-certified rate (Radiation Oncology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Radiation Oncology Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

MALGORZATA KOZAK, M.D. appears in the CMS NPPES registry as a Radiation Oncology Physician provider holding M.D. credentials at 200 HAWKINS DR, IOWA CITY, IA, 52242, with a listed phone of (319) 353-8836. NPI 1083091235 was issued on 04/27/2015. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KOZAK most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 29 prescription claims written by this provider, covering 15 Medicare beneficiaries and totaling roughly $403 in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Radiation Oncology Physician is a mid-sized specialty nationwide, with 6,018 enrolled providers across 52 states and an average of 186 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

200 HAWKINS DR
IOWA CITY, IA 52242

Provider Details

NPI 1083091235
Specialty Radiation Oncology Physician
Credentials M.D.
Gender Female
NPI Issued 04/27/2015

Hospital and facility affiliations

Facilities where MALGORZATA KOZAK, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

UNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL CENTER AT DALLAS
DALLAS, TX

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

29
Total Claims
$403
Total Drug Cost
15
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
29
Total Day Supply
436
Brand Drug Cost
$0
Generic Drug Cost
$403

Patient Demographics

Average Patient Age
71.6 years
Avg HCC Risk Score
3.06

Radiation Oncology Physician Overview

How MALGORZATA KOZAK, M.D. fits within the Radiation Oncology Physician landscape nationally.

6,018
Radiation Oncology Physician Providers in US
52
States with Radiation Oncology Physician
186
Avg Claims per Provider

MALGORZATA KOZAK, M.D.'s 29 claims are below the specialty average of 186.

Nearby Radiation Oncology Physician Providers in Iowa

Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as KOZAK.

Compare Radiation Oncology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is MALGORZATA KOZAK, M.D.'s specialty?
MALGORZATA KOZAK, M.D. specializes in Radiation Oncology Physician and practices in IOWA CITY, Iowa. Credentials: M.D..
How much does MALGORZATA KOZAK, M.D. prescribe under Medicare Part D?
In 2023, MALGORZATA KOZAK, M.D. wrote 29 Medicare Part D claims totaling $403 in drug costs for 15 beneficiaries.
Where is MALGORZATA KOZAK, M.D. located?
MALGORZATA KOZAK, M.D. is located at 200 HAWKINS DR, IOWA CITY, IA, 52242. Phone: (319) 353-8836.
What is MALGORZATA KOZAK, M.D.'s NPI number?
MALGORZATA KOZAK, M.D.'s National Provider Identifier (NPI) is 1083091235, issued on 04/27/2015.
How many Radiation Oncology Physician providers are there in the US?
There are 6,018 Radiation Oncology Physician providers across 52 states in the US. The average Radiation Oncology Physician provider writes 186 Medicare Part D claims per year.
Does MALGORZATA KOZAK, M.D. accept Medicare?
MALGORZATA KOZAK, M.D. appears in CMS Medicare data with 29 Part D claims and 15 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MALGORZATA KOZAK, M.D.'s credentials?
MALGORZATA KOZAK, M.D.'s NPI is 1083091235 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology