Dr. Anthony A. Niezyniecki, MD
- Medicare services, 2024
- 191
- Medicare patients, 2024
- 159
- Part D claims, 2024
- 177
- MIPS score, 2024
- 86
- Hospital affiliations
- 1
- Practice address
- 1625 S State St, Belvidere, IL 61008
- Practice phone
- Call (815) 961-2030
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UW Health Belvidere Hospital
Belvidere, Illinois
Find Dr. Niezyniecki's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Anthony A. Niezyniecki is an emergency medicine physician in Belvidere, Illinois
Dr. Niezyniecki practices at UW Health Belvidere Hospital in Belvidere, Illinois.
Dr. Niezyniecki's NPI, 1104864842, was assigned on June 3, 2006. Dr. Niezyniecki graduated from Northwestern University Feinberg Medical School in 1993. Dr. Niezyniecki holds Wisconsin license 38776-020.
- NPI
- 1104864842NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7719997642
- NPI enumeration date
- June 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (815) 961-2030
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Anthony A. Niezyniecki practices at UW Health Belvidere Hospital in Belvidere, Illinois
Dr. Niezyniecki's primary practice is UW Health Belvidere Hospital, at 1625 S State St, Belvidere, IL 61008 in Boone County. The practice phone is (815) 961-2030.
- UW Health Belvidere Hospital1625 S State St, Belvidere, IL 61008 · Boone CountyPhone(815) 961-2030
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Anthony A. Niezyniecki is affiliated with 4 sites of care and 2 medical groups
Dr. Niezyniecki's primary practice is UW Health Belvidere Hospital in Belvidere, Illinois. Dr. Niezyniecki is also affiliated with UW Health SwedishAmerican Hospital. The medical group on file is ApolloMD. Dmand AI also links Dr. Niezyniecki to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Anthony A. Niezyniecki's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Niezyniecki practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UW Health Belvidere Hospital | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Anthony A. Niezyniecki is one of 2,385 emergency medicine physicians in Illinois
Emergency medicine is Dr. Niezyniecki's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Niezyniecki's licenses on file in 2 states: Wisconsin and Illinois.
Specialties and state licenses
- Emergency medicine, WisconsinPrimary
- Illinois license
Emergency medicine physicians near Dr. Niezyniecki
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Anthony A. Niezyniecki billed Medicare for 191 services in 2024
CMS data shows 191 Medicare services from Dr. Niezyniecki across 4 procedure codes in 2024, for 159 Medicare patients. Medicare paid $15,608 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Niezyniecki's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2242024: 17024%
- Tests and treatments
- 2023: 552024: 2162%
Dr. Niezyniecki compared with the Illinois median for emergency medicine physicians, 2024
- Dr. Niezyniecki
- Illinois median
- Medicare services
- 191vs 27430% below
- Medicare patients
- 159vs 27342% below
- Part D claims
- 114vs 452.5 times
Medians across 2,281 emergency medicine physicians in Illinois with Dmand AI profiles that report each measure.
Dr. Niezyniecki's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Anthony A. Niezyniecki treated 159 Medicare patients in 2024, average age 72
CMS counts 159 Medicare patients who saw Dr. Niezyniecki in 2024. The largest group is 65 to 74, with 64 patients. 75% of them have high blood pressure, and 70% have high cholesterol. 25% are also on Medicaid. Their average risk score is 1.53, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Niezyniecki's median patient age at 36, with 61% women.
Dr. Niezyniecki's Medicare patients by age, 2024
Dr. Niezyniecki's Medicare patients by sex, 2024
- Women9057%
- Men6943%
Chronic conditions among Dr. Niezyniecki's Medicare patients, 2024
- High blood pressure75%
- High cholesterol70%
- Arthritis55%
- Diabetes38%
- Chronic kidney disease36%
- Mood disorders35%
- Anxiety33%
- Ischemic heart disease28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Niezyniecki's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 36
Patient panel by sex, all payers
- Women61%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Anthony A. Niezyniecki wrote 177 Medicare Part D claims in 2024
In 2024, Dr. Niezyniecki wrote 177 Medicare Part D claims for 129 patients. 94% of them were for generic drugs. CMS names the drug for 114 of them, across 7 drugs with 11 or more claims each, at $865 in total drug cost. In 2023, CMS named 125 claims across 5 drugs.
Dr. Niezyniecki's Part D claims by kind of drug, 2024
- Generic166 claims94%
- Brand-name11 claims6%
Dr. Niezyniecki's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Niezyniecki's Part D claims, 2024
- Opioids9%16 of 177 claims
- Antibiotics46%81 of 177 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1252024: 1149%
Drugs named by CMS: 7 in 2024, 5 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Anthony A. Niezyniecki scored 86 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 86 out of 100 for Dr. Niezyniecki for performance year 2024, reported as part of a group. Dr. Niezyniecki accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Niezyniecki's MIPS scores, performance year 2024
- 86of 100Final score
- 78.1of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Anthony A. Niezyniecki received $209 in industry payments from 2016 to 2019
CMS Open Payments shows 9 general payments to Dr. Niezyniecki from 3 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 100% of the total. The Medicines Company paid the most, $131.
General payments to Dr. Niezyniecki by program year, 2016 to 2019
Companies that paid Dr. Niezyniecki the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Anthony A. Niezyniecki graduated from Northwestern University Feinberg Medical School
Dr. Niezyniecki graduated from Northwestern University Feinberg Medical School in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Anthony A. Niezyniecki's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Anthony A. Niezyniecki
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Anthony A. Niezyniecki's NPI number?
Dr. Anthony A. Niezyniecki's NPI number is 1104864842. It was assigned on June 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Anthony A. Niezyniecki?
Dr. Anthony A. Niezyniecki is an emergency medicine physician in Belvidere, Illinois. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Anthony A. Niezyniecki practice?
Dr. Niezyniecki practices at 1625 S State St, Belvidere, IL 61008. Dr. Niezyniecki's primary practice is UW Health Belvidere Hospital in Belvidere, Illinois. Dmand AI also links Dr. Niezyniecki to 2 group practices and clinics and 1 medical group.
What is Dr. Anthony A. Niezyniecki's office phone number?
The practice phone on file for Dr. Niezyniecki is (815) 961-2030.
What is Dr. Anthony A. Niezyniecki's medical license number?
Dr. Niezyniecki holds Wisconsin license 38776-020, one of the licenses on file in 2 states.
Which states has Dr. Anthony A. Niezyniecki been licensed in?
Dmand AI has state licenses on file for Dr. Niezyniecki in Wisconsin and Illinois.
Which hospitals is Dr. Anthony A. Niezyniecki affiliated with?
Dr. Niezyniecki is affiliated with UW Health SwedishAmerican Hospital.
What medical group is Dr. Anthony A. Niezyniecki part of?
Dr. Niezyniecki is linked to ApolloMD. Dmand AI links Dr. Niezyniecki to 1 more medical group.
Does Dr. Anthony A. Niezyniecki accept Medicare?
Yes. CMS data shows Dr. Niezyniecki billed Medicare for 191 services in 2024, and Dr. Niezyniecki accepts Medicare assignment.
What is Dr. Anthony A. Niezyniecki's MIPS score?
Dr. Niezyniecki's MIPS final score for performance year 2024 is 86 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Anthony A. Niezyniecki see?
CMS counts 159 Medicare patients who saw Dr. Niezyniecki in 2024, with an average age of 72.
What services does Dr. Anthony A. Niezyniecki bill to Medicare?
In 2024, Dr. Niezyniecki's most billed Medicare services were emergency department visit (99284), emergency department visit (99285) and heart test or procedure (93010).
Where did Dr. Anthony A. Niezyniecki go to medical school?
Dr. Niezyniecki graduated from Northwestern University Feinberg Medical School in 1993.
What drugs does Dr. Anthony A. Niezyniecki prescribe most?
In 2024 Medicare Part D data, Dr. Niezyniecki's most prescribed drugs by claims were Cephalexin, Prednisone and Hydrocodone-Acetaminophen.
Has Dr. Anthony A. Niezyniecki received payments from drug or device companies?
CMS Open Payments shows $209 in general payments to Dr. Niezyniecki from 3 companies from 2016 to 2019. The largest total came from The Medicines Company.
How long has Dr. Anthony A. Niezyniecki been practicing?
Dr. Niezyniecki graduated from medical school in 1993, 33 years ago.
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