Medicare Enrolled
Dr. Diana Zamojski, DO
Family Medicine · Oak Lawn, IL
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Low-engagement
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Zamojski from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
Are you Dr. Zamojski?
Request a correction or review of any data shown here. Provider portal →
What this data tells you about Dr. Zamojski
Dr. Diana Zamojski is a family medicine specialist in Oak Lawn, IL, with 20 years of NPI registration. Based on federal Medicare data, Dr. Zamojski performed 1,964 Medicare services across 1,579 unique beneficiaries.
Between the years covered by Open Payments, Dr. Zamojski received a total of $15,377 from 45 pharmaceutical and/or device companies across 780 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in family medicine. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Zamojski is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 20 years in practice
▲ Top 10% volume in IL
$15,377 industry payments
Medicare Practice Summary
Medicare Utilization ↗1,964
Medicare services
Top 10% in IL for family medicine
1,579
Unique beneficiaries
$67
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~98 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
350 | $96 | $320 |
| Chronic care management, first 20 min/month This service covers the first 20 minutes of clinical staff time directed by a healthcare professional each calendar month to manage chronic conditions. |
242 | $48 | $140 |
| Annual intensive behavioral therapy for cardiovascular disease, 15 minutes A yearly, in-person session focused on intensive behavioral therapy to help manage cardiovascular disease. The session lasts for 15 minutes and is conducted with the patient individually. |
191 | $27 | $50 |
| Annual alcohol misuse screening, 5 to 15 minutes | 166 | $19 | $58 |
| Annual depression screening | 164 | $19 | $40 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
162 | $134 | $275 |
| Obesity behavioral counseling, 15 minutes A 15-minute face-to-face session focused on behavioral counseling to help manage obesity. |
94 | $27 | $63 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
72 | $32 | $60 |
| Flu vaccine, high-dose High-dose seasonal influenza vaccine for adults aged 65 and older. Contains four times the antigen of standard-dose flu vaccines (60 mcg per strain), split-virus formulation, preservative-free, single-dose syringe. |
69 | $72 | $90 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
67 | $70 | $220 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
64 | $8 | $20 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
61 | $136 | $420 |
| Transitional care management, high complexity Coordination of care for a patient transitioning from a short-term hospital stay or other facility to home or another care setting. This service addresses a high-complexity medical problem. |
48 | $223 | $500 |
| Advance care planning consultation, first 30 min A session focused on discussing and documenting future healthcare preferences and goals. This service covers the initial 30 minutes of the planning discussion. |
29 | $77 | $150 |
| Electrocardiogram (EKG), 12-lead A standard heart rhythm test using at least 12 leads to record electrical activity. A healthcare provider interprets the results and provides a written report. |
28 | $12 | $60 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
26 | $92 | $600 |
| Respiratory virus test for SARS-CoV-2, influenza A/B, and RSV A laboratory test that detects the presence of SARS-CoV-2 (COVID-19), influenza A, influenza B, and respiratory syncytial virus (RSV) in an upper respiratory specimen. |
24 | $140 | $250 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
21 | $10 | $40 |
| Pneumococcal conjugate vaccine (PCV20) An intramuscular injection of the 20-valent pneumococcal conjugate vaccine. It is used to protect against diseases caused by Streptococcus pneumoniae bacteria. |
14 | $281 | $350 |
| Pneumonia vaccine administration This procedure involves the injection of a vaccine to protect against pneumococcal disease. It is administered by a healthcare provider. |
14 | $32 | $60 |
| Ultrasound of head and neck blood flow, bilateral An ultrasound exam that uses sound waves to visualize and assess blood flow in the vessels of both the head and the neck. |
13 | $125 | $600 |
| Initial preventive physical examination, new Medicare beneficiary A comprehensive preventive health visit for new Medicare beneficiaries during their first 12 months of enrollment. The service is conducted as a face-to-face visit and is limited to preventive care. |
12 | $172 | $360 |
| Automated urinalysis An automated laboratory test performed on a urine sample to analyze its chemical and physical properties. The procedure uses machinery to detect various substances and cells within the urine. |
11 | $2 | $20 |
| Chronic care management, first 30 minutes This service covers the initial 30 minutes of care coordination for patients with two or more chronic conditions. It is provided personally by a healthcare professional each calendar month. |
11 | $70 | $175 |
| Annual wellness visit, initial visit A yearly appointment to review your health and create a personalized prevention plan. This initial visit focuses on preventive care and health assessment. |
11 | $172 | $360 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
1.3% high complexity
0.7% medium
98.0% routine
Industry Payment Transparency
Open Payments through 2024 ↗$15,377
Total received (2018-2024)
Avg $2,197/year across 7 years
Top 2% in IL for family medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
45
Companies
780
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$15,377 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,730
2023
$2,521
2022
$2,776
2021
$2,404
2020
$1,656
2019
$2,635
2018
$1,654
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
PFIZER INC.
$348
AstraZeneca Pharmaceuticals LP
$309
ABBVIE INC.
$189
Lilly USA, LLC
$160
Amgen Inc.
$156
Novo Nordisk Inc
$104
Otsuka America Pharmaceutical, Inc.
$102
Astellas Pharma US Inc
$91
GlaxoSmithKline, LLC.
$85
Boehringer Ingelheim Pharmaceuticals, Inc.
$60
Janssen Pharmaceuticals, Inc
$59
Abbott Laboratories
$48
Phathom Pharmaceuticals, Inc.
$20
Top 3 companies account for 48.9% of 2024 payments
All-time payments by company (2018-2024) ›
Novo Nordisk Inc
$2,172
AstraZeneca Pharmaceuticals LP
$1,855
PFIZER INC.
$1,840
GlaxoSmithKline, LLC.
$1,387
Boehringer Ingelheim Pharmaceuticals, Inc.
$1,152
Lilly USA, LLC
$835
ABBVIE INC.
$803
Amgen Inc.
$762
Janssen Pharmaceuticals, Inc
$607
AbbVie Inc.
$551
SANOFI-AVENTIS U.S. LLC
$488
Allergan, Inc.
$322
Novartis Pharmaceuticals Corporation
$317
Astellas Pharma US Inc
$252
Allergan Inc.
$226
Otsuka America Pharmaceutical, Inc.
$183
Amarin Pharma Inc.
$173
Bayer Healthcare Pharmaceuticals Inc.
$152
Bayer HealthCare Pharmaceuticals Inc.
$150
Teva Pharmaceuticals USA, Inc.
$117
Abbott Laboratories
$114
Biohaven Pharmaceuticals, Inc.
$97
Biohaven Pharmaceutical Holding Company Ltd.
$67
Ironwood Pharmaceuticals, Inc
$63
Merck Sharp & Dohme LLC
$62
E.R. Squibb & Sons, L.L.C.
$61
Daiichi Sankyo Inc.
$59
Exact Sciences Corporation
$45
Ultragenyx Pharmaceutical Inc.
$41
Merck Sharp & Dohme Corporation
$40
Genentech USA, Inc.
$39
ARBOR PHARMACEUTICALS, INC.
$38
Dynavax Technologies Corporation
$34
Sanofi Pasteur Inc.
$33
Sunovion Pharmaceuticals Inc.
$33
Takeda Pharmaceuticals U.S.A., Inc.
$28
SANOFI PASTEUR INC.
$26
Shield Therapeutics Inc
$24
AbbVie, Inc.
$21
Exeltis, USA Inc.
$20
Phathom Pharmaceuticals, Inc.
$20
IBSA Pharma Inc.
$19
Radius Health, Inc.
$18
Synergy Pharmaceuticals Inc
$16
Hologic, LLC
$16
Top 3 companies account for 38.2% of all-time payments
Associated products mentioned in payments ›
ACCRUFER · ADVAIR · AIRSUPRA · AJOVY · ANORO · ANORO ELLIPTA · APTIMA · AREXVY · Aimovig · AirDuo Digihaler · BASAGLAR · BEVESPI AEROSPHERE · BEXSERO · BOTOX · BREZTRI · BREZTRI AEROSPHERE · BYDUREON · BYSTOLIC · CHANTIX · COMIRNATY · Cologuard Collection Kit · Creon · Cryvista · ELIQUIS · EMGALITY · ENTRESTO · EVENITY · Edarbyclor · FARXIGA · FASENRA · FLUMIST QUADRIVALENT · FLUZONE HIGH-DOSE · FREESTYLE LIBRE 3 · GARDASIL 9 · Heplisav-B · INJECTAFER · INVOKANA · JARDIANCE · KRYSTEXXA · Kerendia · LEQVIO · LICART · LINZESS · LONHALA MAGNAIR · LYRICA · Linzess · MOUNJARO · MYRBETRIQ · Myrbetriq · NURTEC ODT · Otezla · Ozempic · PREVNAR - 13 · PREVNAR 13 · PREVNAR 20 · PROCLAIM · ProAir Digihaler · Prolia · QULIPTA · QVAR · REXULTI · RYBELSUS · Repatha · Rybelsus · SHINGRIX · SLYND · SOLIQUA · SOLIQUA 100/33 · SPIRIVA · SPIRIVA RESPIMAT · STIOLTO · SYMBICORT · SYNJARDY · Saxenda · TOUJEO · TOVIAZ · TRELEGY ELLIPTA · TRINTELLIX · TRULICITY · TRUMENBA · Tresiba · Trulance · Tymlos · UBRELVY · VIBERZI · VOQUEZNA · VRAYLAR · Vascepa · Veozah · Victoza · Wegovy · XARELTO · Xofluza · ZEPBOUND
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 2% for family medicine in IL.
Geographic Context
Family medicine physicians within 10 mi
3,023
Per 100K population
58.3
County median income
$81,797
Nearest hospital
ADVOCATE CHRIST HOSPITAL & MEDICAL CENTER
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Zamojski is a clinical cardiology specialist, with above-average Medicare volume (top 10% in IL), with low-engagement industry engagement in the top 2% of IL peers, with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Zamojski experienced with office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Zamojski performed 350 office visit, established patient (30-39 min) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Zamojski receive payments from pharmaceutical companies?
Yes. Dr. Zamojski received a total of $15,377 from 45 companies across 780 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Zamojski's costs compare to other family medicine physicians in Oak Lawn?
Dr. Zamojski's average Medicare payment per service is $67. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Zamojski) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
Explore related providers
Specialty guide
Understanding Family Medicine
Common procedures, typical costs, and what industry payments mean in family medicine.
Same specialty & city
Family Medicine Physicians in Oak Lawn
Browse family medicine physicians in Oak Lawn ranked by procedure volume and transparency data.
Highest volume
Top Family Medicine Physicians in IL
Family medicine physicians ranked by total Medicare services performed statewide.
Industry payments
Pharma Payments to Family Medicine Physicians in IL
Which IL family medicine physicians receive the most from drug and device companies.
By company
Novo Nordisk Inc Payments to Doctors
See all physicians who received payments from Novo Nordisk Inc.
By company
AstraZeneca Pharmaceuticals LP Payments to Doctors
See all physicians who received payments from AstraZeneca Pharmaceuticals LP.
By company
PFIZER INC. Payments to Doctors
See all physicians who received payments from PFIZER INC.
About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology