Dr. Andrew A. Mazulis, MD
- Medicare services, 2024
- 1,180
- Medicare patients, 2024
- 387
- Part D claims, 2024
- 611
- Hospital affiliations
- 3
- Industry payments
- $3,290
- Practice address
- 801 S Milwaukee Ave, Libertyville, IL 60048
- Practice phone
- Call (847) 362-2900
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mazulis' professional email, personal email and mobile number
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Dr. Andrew A. Mazulis is a gastroenterologist in Libertyville, Illinois
Dr. Mazulis practices at Advocate Condell Medical Center in Libertyville, Illinois, part of Advocate Health.
Dr. Mazulis' NPI, 1699031583, was assigned on April 5, 2012. Dr. Mazulis holds Illinois license 036-135984.
- NPI
- 1699031583NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0042515595
- NPI enumeration date
- April 5, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (847) 362-2900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Andrew A. Mazulis practices at Advocate Condell Medical Center in Libertyville, Illinois
Dr. Mazulis' primary practice is Advocate Condell Medical Center, at 801 S Milwaukee Ave, Libertyville, IL 60048 in Lake County. The practice phone is (847) 362-2900.
- Advocate Condell Medical Center801 S Milwaukee Ave, Libertyville, IL 60048 · Lake CountyPhone(847) 362-2900
Source: Dmand AI Affiliation Data
Dr. Andrew A. Mazulis is affiliated with 6 sites of care and 3 medical groups
Dr. Mazulis' primary practice is Advocate Condell Medical Center in Libertyville, Illinois, part of Advocate Health. Dr. Mazulis is also affiliated with Advocate Illinois Masonic Medical Center. The medical group on file is Dreyer Medical Clinic (Advocate Medical Group). Dmand AI also links Dr. Mazulis to 1 more hospital, 2 group practices and clinics, 2 medical groups and 1 hospital outpatient department, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Andrew A. Mazulis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mazulis practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Advocate Condell Medical Center | Available with a free account |
| +5 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Advocate Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Andrew A. Mazulis is one of 771 gastroenterologists in Illinois
Gastroenterology is Dr. Mazulis' primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Mazulis' licenses on file in 2 states: Illinois and Wisconsin.
Specialties and state licenses
- Gastroenterology, IllinoisPrimary
- Wisconsin license
Gastroenterologists near Dr. Mazulis
Counts of gastroenterologists 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. Andrew A. Mazulis billed Medicare for 1,180 services in 2024
CMS data shows 1,180 Medicare services from Dr. Mazulis across 17 procedure codes in 2024, for 387 Medicare patients. Medicare paid $106,541 for them.
Dr. Mazulis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4072024: 851109%
- Surgery
- 2023: 3352024: 28615%
- Other services
- 2023: 412024: 435%
Where Dr. Mazulis' Medicare services took place, 2024
- In an office17114%
- In a facility1,00986%
Dr. Mazulis compared with the Illinois median for gastroenterologists, 2024
- Dr. Mazulis
- Illinois median
- Medicare services
- 1,180vs 4982.4 times
- Medicare patients
- 387vs 30726% above
- Part D claims
- 495vs 37034% above
Medians across 757 gastroenterologists in Illinois with Dmand AI profiles that report each measure.
Dr. Mazulis' 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.
Need commercial claims for Dr. Mazulis?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mazulis and other gastroenterologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Andrew A. Mazulis treated 387 Medicare patients in 2024, average age 75
CMS counts 387 Medicare patients who saw Dr. Mazulis in 2024. The largest group is 65 to 74, with 144 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 22% are also on Medicaid. Their average risk score is 2.05, 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. Mazulis' median patient age at 70, with 57% women.
Dr. Mazulis' Medicare patients by age, 2024
Dr. Mazulis' Medicare patients by sex, 2024
- Women22358%
- Men16442%
Chronic conditions among Dr. Mazulis' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Ischemic heart disease48%
- Diabetes45%
- Chronic kidney disease44%
- Mood disorders44%
- Depression40%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mazulis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Andrew A. Mazulis wrote 611 Medicare Part D claims in 2024
In 2024, Dr. Mazulis wrote 611 Medicare Part D claims for 299 patients. 74% of them were for generic drugs. CMS names the drug for 495 of them, across 9 drugs with 11 or more claims each, at $37,668 in total drug cost. In 2023, CMS named 1,406 claims across 20 drugs.
Dr. Mazulis' Part D claims by kind of drug, 2024
- Generic450 claims74%
- Brand-name161 claims26%
Dr. Mazulis' 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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,4062024: 49565%
Drugs named by CMS: 9 in 2024, 20 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. Andrew A. Mazulis ranks in the 92nd percentile for colonoscopy in Medicare
Dr. Mazulis accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Mazulis as offering telehealth. CMS counts 187 procedures of colonoscopy by Dr. Mazulis, more than 92% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Mazulis ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 90th percentile199 procedures
- Colonoscopy
- 92nd percentile187 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Andrew A. Mazulis received $3,290 in industry payments from 2016 to 2025
CMS Open Payments shows 183 general payments to Dr. Mazulis from 19 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Abbvie Inc. paid the most, $785.
General payments to Dr. Mazulis by program year, 2016 to 2025
General payments to Dr. Mazulis by kind, 2016 to 2025
- Food and beverage$3,21698%
- Education$742%
Companies that paid Dr. Mazulis the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Andrew A. Mazulis'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Andrew A. Mazulis
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. Andrew A. Mazulis' NPI number?
Dr. Andrew A. Mazulis' NPI number is 1699031583. It was assigned on April 5, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Andrew A. Mazulis?
Dr. Andrew A. Mazulis is a gastroenterologist in Libertyville, Illinois. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Andrew A. Mazulis practice?
Dr. Mazulis practices at 801 S Milwaukee Ave, Libertyville, IL 60048. Dr. Mazulis' primary practice is Advocate Condell Medical Center in Libertyville, Illinois, part of Advocate Health. Dmand AI also links Dr. Mazulis to 1 hospital, 2 group practices and clinics, 2 medical groups and 1 hospital outpatient department.
What is Dr. Andrew A. Mazulis' office phone number?
The practice phone on file for Dr. Mazulis is (847) 362-2900.
What is Dr. Andrew A. Mazulis' medical license number?
Dr. Mazulis holds Illinois license 036-135984, one of the licenses on file in 2 states.
Which states has Dr. Andrew A. Mazulis been licensed in?
Dmand AI has state licenses on file for Dr. Mazulis in Illinois and Wisconsin.
Which hospitals is Dr. Andrew A. Mazulis affiliated with?
Dr. Mazulis practices at Advocate Condell Medical Center in Libertyville, Illinois. Dr. Mazulis is also affiliated with Advocate Illinois Masonic Medical Center. Dmand AI links Dr. Mazulis to 1 more hospital.
What medical group is Dr. Andrew A. Mazulis part of?
Dr. Mazulis is linked to Dreyer Medical Clinic (Advocate Medical Group). Dmand AI links Dr. Mazulis to 2 more medical groups.
Does Dr. Andrew A. Mazulis accept Medicare?
Yes. CMS data shows Dr. Mazulis billed Medicare for 1,180 services in 2024, and Dr. Mazulis accepts Medicare assignment.
Does Dr. Andrew A. Mazulis offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Mazulis as offering telehealth services.
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How many Medicare patients does Dr. Andrew A. Mazulis see?
CMS counts 387 Medicare patients who saw Dr. Mazulis in 2024, with an average age of 75.
What services does Dr. Andrew A. Mazulis bill to Medicare?
In 2024, Dr. Mazulis' most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99222).
What drugs does Dr. Andrew A. Mazulis prescribe most?
In 2024 Medicare Part D data, Dr. Mazulis' most prescribed drugs by claims were Pantoprazole Sodium, Peg 3350-Electrolyte and Famotidine.
Has Dr. Andrew A. Mazulis received payments from drug or device companies?
CMS Open Payments shows $3,290 in general payments to Dr. Mazulis from 19 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Andrew A. Mazulis been practicing?
Dr. Mazulis graduated from medical school in 2012, 14 years ago.
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