2026 NPPES data Nuclear Imaging & Therapy Physician NPI 1134304512 M.D.
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JAN RYSZKOWSKI, M.D.

Nuclear Imaging & Therapy Physician in LITTLE ROCK, Arkansas. 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
543
Medicare Part D claims · 182 beneficiaries · Nuclear Imaging & Therapy Physician avg: 992
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
90.3887/100
▲ 7 pts above national avg 83.1 · [object Object]
Industry payments
$640.36
23 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

JAN RYSZKOWSKI, M.D. reported a CMS MIPS final score of 90.3887/100 — above the 83.1 national average — and filed 543 Medicare Part D claims in 2023.

90.3887/100
MIPS score · +7 vs avg
543
Part D claims, 2023
91%
generic prescribing
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.

JAN RYSZKOWSKI, M.D.'s MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

90 Top 40% higher than 60% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90–100: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023

Board certification likely (heuristic — not verified)

JAN RYSZKOWSKI, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 JAN RYSZKOWSKI, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 01/04/2008

NPI 1134304512

Primary specialty

Nuclear Imaging & Therapy Physician

Rare

199 US NPIs in this specialty

Medicare Part D claims

543 45% vs specialty avg

2023 prescription claims

Specialty avg: 992

MIPS final score

90.3887/100 7.288700000000006% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Arkansas

How Nuclear Imaging & Therapy Physician compares to other specialties among Arkansas providers

Arkansas providers

Nuclear Imaging & Therapy Physician share within Arkansas

1. Nuclear Imaging & Therapy Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Nuclear Imaging & Therapy Physician share within Arkansas

Medicare quality performance — MIPS

JAN RYSZKOWSKI, M.D.'s 2023 MIPS final score plotted against the Nuclear Imaging & Therapy Physician national average

High performer (top quartile)
MIPS Final Score
90.3887/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Nuclear Imaging & Therapy Physician) — 90.3887/100 vs national avg 83.1

0%100%National avg83%90.4%
MIPS final score (Nuclear Imaging & Therapy Physician) — 90.3887/100 vs national avg 83.1

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).

JAN RYSZKOWSKI, M.D. appears in the CMS NPPES registry as a Nuclear Imaging & Therapy Physician provider holding M.D. credentials at 316 COMMENTRY WAY, LITTLE ROCK, AR, 72223, with a listed phone of (501) 352-7043. NPI 1134304512 was issued on 01/04/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what RYSZKOWSKI 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 543 prescription claims written by this provider, covering 182 Medicare beneficiaries and totaling roughly $47K in drug spend, split 9% brand-name and 91% generic by claim count. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 90.3887/100 for the 2023 performance year (Quality 69.0237), compared with the national average of 83.1.

Nuclear Imaging & Therapy Physician is a narrow specialty nationwide, with 199 enrolled providers across 35 states and an average of 992 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

316 COMMENTRY WAY
LITTLE ROCK, AR 72223

Provider Details

NPI 1134304512
Specialty Nuclear Imaging & Therapy Physician
Credentials M.D.
Gender Male
NPI Issued 01/04/2008

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

90.3887
Final Score
Avg: 83.1
69.0237
Quality

Reporting: Individual

Hospital and facility affiliations

Facilities where JAN RYSZKOWSKI, 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.

HEALOGICS SPECIALTY PHYSICIANS OF ARKANSAS, PLLC
FAYETTEVILLE, AR

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

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for JAN RYSZKOWSKI, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$640

Largest payer

Paratek Pharmaceuticals, Inc.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Generic-heavy

JAN RYSZKOWSKI, M.D. — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 543 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

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

543
Total Claims
$47K
Total Drug Cost
182
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
549
Total Day Supply
6,877
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$24K
Generic Drug Cost
$23K
Antibiotic Claims
361

Patient Demographics

Average Patient Age
69.2 years
Avg HCC Risk Score
3.16
Gender Split
51% female / 49% male
Age Distribution
<65: 54, 65-74: 67, 75-84: 43, 85+: 18

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What JAN RYSZKOWSKI, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Doxycycline Hyclate
124
Clindamycin Hcl
66
Pentoxifylline
66
Santyl
Collagenase Clostridium Hist.
31
Sulfamethoxazole-Trimethoprim
Sulfamethoxazole/Trimethoprim
28
Cephalexin
24
Levofloxacin
22
Metronidazole
19
Clotrimazole-Betamethasone
Clotrimazole/Betamethasone Dip
17
Cefdinir
16

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Nuclear Imaging & Therapy Physician Overview

How JAN RYSZKOWSKI, M.D. fits within the Nuclear Imaging & Therapy Physician landscape nationally.

199
Nuclear Imaging & Therapy Physician Providers in US
35
States with Nuclear Imaging & Therapy Physician
992
Avg Claims per Provider

JAN RYSZKOWSKI, M.D.'s 543 claims are below the specialty average of 992.

Nearby Nuclear Imaging & Therapy Physician Providers in Arkansas

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

Compare Nuclear Imaging & Therapy Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JAN RYSZKOWSKI, M.D.'s specialty?
JAN RYSZKOWSKI, M.D. specializes in Nuclear Imaging & Therapy Physician and practices in LITTLE ROCK, Arkansas. Credentials: M.D..
How much does JAN RYSZKOWSKI, M.D. prescribe under Medicare Part D?
In 2023, JAN RYSZKOWSKI, M.D. wrote 543 Medicare Part D claims totaling $47K in drug costs for 182 beneficiaries.
What is JAN RYSZKOWSKI, M.D.'s Medicare quality score?
JAN RYSZKOWSKI, M.D. has a CMS MIPS Final Score of 90.3887/100 (Quality: 69.0237). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is JAN RYSZKOWSKI, M.D. located?
JAN RYSZKOWSKI, M.D. is located at 316 COMMENTRY WAY, LITTLE ROCK, AR, 72223. Phone: (501) 352-7043.
What is JAN RYSZKOWSKI, M.D.'s NPI number?
JAN RYSZKOWSKI, M.D.'s National Provider Identifier (NPI) is 1134304512, issued on 01/04/2008.
Does JAN RYSZKOWSKI, M.D. prescribe more brand-name or generic drugs?
JAN RYSZKOWSKI, M.D.'s prescribing is 9% brand-name and 91% generic drugs by claim count, with $24K in brand drug costs.
How many Nuclear Imaging & Therapy Physician providers are there in the US?
There are 199 Nuclear Imaging & Therapy Physician providers across 35 states in the US. The average Nuclear Imaging & Therapy Physician provider writes 992 Medicare Part D claims per year.
What drugs does JAN RYSZKOWSKI, M.D. prescribe most often?
Based on 2023 Medicare Part D data, JAN RYSZKOWSKI, M.D.'s most frequently prescribed drugs include Doxycycline Hyclate, Clindamycin Hcl, Pentoxifylline. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JAN RYSZKOWSKI, M.D. accept Medicare?
JAN RYSZKOWSKI, M.D. appears in CMS Medicare data with 543 Part D claims and 182 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JAN RYSZKOWSKI, M.D.'s credentials?
JAN RYSZKOWSKI, M.D.'s NPI is 1134304512 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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