Maria Wolter , APN
Nurse Practitioner โข Oak Brook, IL
3011 Butterfield Rd Ste 240
Oak Brook, IL 605233132
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on December 13, 2020; this date does not establish years in practice.
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Published CMS data list 486 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 โ Established patient outpatient office visit: 248 service units.
- 83525 โ Insulin measurement, total: 50 service units.
- 36415 โ Insertion of needle into vein for collection of blood sample: 42 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 9 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 520 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Metformin Hcl Er (Metformin Hcl) โ 134 prescription fills, including refills.
- Mounjaro (Tirzepatide) โ 110 prescription fills, including refills.
- Ozempic (Semaglutide) โ 104 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 12 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 70% of clinicians listed under Nurse Practitioner in Illinois (2024, 2,561 clinicians with data). Median for this group: 261. Middle half: 101 to 526.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 225 in 2021 to 486 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2021โ2024.
Practice Location & Contact Primary Location
3011 Butterfield Rd Ste 240
Oak Brook, IL 605233132
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Evergreen Park, IL. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Dupage Medical Group Ltd. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2020
What Public CMS Data Show
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
64 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $31,948 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $23,729 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
1,039 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$320,264 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $2,406.60 across 116 records.
By nature of payment
- Food and Beverage: $2,406.60 across 116 records.
Reporting-company totals (3 largest of 21)
- ABBVIE INC.: $520.72 across 32 records.
- Novo Nordisk Inc: $420.25 across 19 records.
- Madrigal Pharmaceuticals: $185.56 across 4 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
6 years (graduated 2020)
CMS Doctors and Clinicians data list 2020 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2020
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Maria Wolter has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Maria Wolter as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Oak Brook and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 70% of clinicians listed under Nurse Practitioner in Illinois (2024, 2,561 clinicians with data). Median for this group: 261. Middle half: 101 to 526.
Too few clinicians listed under Nurse Practitioner in Oak Brook have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 65% of clinicians listed under Nurse Practitioner in Illinois (2024, 2,561 clinicians with data). Median for this group: $21,010. Middle half: $8,652 to $42,014.
Too few clinicians listed under Nurse Practitioner in Oak Brook have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 65% of clinicians listed under Nurse Practitioner in Illinois (2024, 2,561 clinicians with data). Median for this group: $15,151. Middle half: $6,396 to $31,322.
Too few clinicians listed under Nurse Practitioner in Oak Brook have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 60% of clinicians listed under Nurse Practitioner in Illinois (2024, 2,572 clinicians with data). Median for this group: 259. Middle half: 80 to 930.
Too few clinicians listed under Nurse Practitioner in Oak Brook have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 85% of clinicians listed under Nurse Practitioner in Illinois (2024, 2,572 clinicians with data). Median for this group: $10,867. Middle half: $976 to $113,945.
Too few clinicians listed under Nurse Practitioner in Oak Brook have Medicare Part D data for 2024 to compare.
13 active clinicians are listed under Nurse Practitioner with a practice address in Oak Brook, IL (4,894 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Oak Brook
23.1% of these 13 clinicians have the CMS telehealth indicator.
38.5% of these 13 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 116% from 225 in 2021 to 486 in 2024.
- 2021: 225
- 2022: 560
- 2023: 244
- 2024: 486
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Medicare-allowed amount
Medicare-allowed amount increased 73% from $18,416 in 2021 to $31,948 in 2024.
- 2021: $18,416
- 2022: $47,346
- 2023: $17,770
- 2024: $31,948
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Paid by Medicare
Paid by Medicare increased 84% from $12,872 in 2021 to $23,729 in 2024.
- 2021: $12,872
- 2022: $34,035
- 2023: $11,118
- 2024: $23,729
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Medicare Part D prescriptions
Medicare Part D prescriptions varied from year to year: 520 in 2021 and 520 in 2024.
- 2021: 520
- 2022: 1,880
- 2023: 1,040
- 2024: 520
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30-day fills
30-day fills decreased 14% from 1,210 in 2021 to 1,039 in 2024.
- 2021: 1,210
- 2022: 4,313
- 2023: 2,507
- 2024: 1,039
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Part D drug cost
Part D drug cost increased 1264% from $23,473 in 2021 to $320,264 in 2024.
- 2021: $23,473
- 2022: $115,460
- 2023: $94,523
- 2024: $320,264
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $354.41 in 2021 to $2,406.60 in 2025.
- 2021: $354.41
- 2022: $18.60
- 2023: $1,087.80
- 2024: $2,617.41
- 2025: $2,406.60
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): 116 records totaling $2,406.60.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Madrigal Pharmaceuticals |
Food and Beverage
In-kind items and services
|
REZDIFFRA | General | $149.57 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
CREON | General | $123.64 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
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APOLLO ESG System | General | $121.30 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
Wegovy | General | $105.96 |
| Phathom Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
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VOQUEZNA | General | $39.05 |
| Aimmune Therapeutics, Inc. |
Food and Beverage
In-kind items and services
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ZENPEP | General | $38.14 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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ZEPBOUND | General | $34.79 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
JARDIANCE | General | $32.13 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
LINZESS | General | $31.99 |
| Otsuka America Pharmaceutical, Inc. |
Food and Beverage
In-kind items and services
|
REXULTI | General | $30.94 |
| Phathom Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
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VOQUEZNA | General | $30.22 |
| Corcept Therapeutics |
Food and Beverage
In-kind items and services
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Korlym | General | $29.50 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $29.21 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
|
JARDIANCE | General | $28.46 |
| RECORDATI_RARE_DISEASES_INC. |
Food and Beverage
In-kind items and services
|
ISTURISA | General | $27.96 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
Wegovy | General | $26.54 |
| Otsuka America Pharmaceutical, Inc. |
Food and Beverage
In-kind items and services
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REXULTI | General | $26.46 |
| Corcept Therapeutics |
Food and Beverage
In-kind items and services
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Korlym | General | $26.36 |
| RECORDATI_RARE_DISEASES_INC. |
Food and Beverage
In-kind items and services
|
ISTURISA | General | $26.21 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
VRAYLAR | General | $25.56 |
| RECORDATI_RARE_DISEASES_INC. |
Food and Beverage
In-kind items and services
|
ISTURISA | General | $25.33 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
CREON | General | $25.04 |
| Phathom Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
|
VOQUEZNA | General | $24.90 |
| VIVUS LLC |
Food and Beverage
In-kind items and services
|
QSYMIA | General | $24.25 |
| Esperion Therapeutics, Inc. |
Food and Beverage
In-kind items and services
|
NEXLETOL | General | $24.22 |
(top 25 shown)
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2020โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2021โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
|
248 | 62 | $229.00 | $110.37 |
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83525
Insulin measurement, total
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50 | 37 | $59.00 | $11.20 |
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36415
Insertion of needle into vein for collection of blood sample
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42 | 30 | $20.00 | $8.65 |
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83036
Hemoglobin a1c level
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41 | 31 | $50.00 | $9.52 |
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82306
Vitamin d-3 level
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31 | 29 | $152.00 | $29.01 |
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82607
Cyanocobalamin (vitamin b-12) level
|
31 | 30 | $77.00 | $14.78 |
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80048
Blood test, basic group of blood chemicals (calcium, total)
|
17 | 14 | $44.00 | $8.29 |
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80053
Blood test, comprehensive group of blood chemicals
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15 | 15 | $55.00 | $10.35 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
|
11 | 11 | $359.00 | $146.24 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Metformin Hcl Er | Metformin Hcl | 134 | 11,613 | $1,255.39 | 47 |
| Mounjaro | Tirzepatide | 110 | 3,474 | $129,923.28 | 22 |
| Ozempic | Semaglutide | 104 | 4,416 | $135,595.03 | 26 |
| Topiramate | Topiramate | 47 | 3,885 | $649.91 | 18 |
| Trulicity | Dulaglutide | 28 | 896 | $29,799.69 | โ |
| Naltrexone Hcl | Naltrexone Hcl | 18 | 592 | $798.16 | โ |
| Levothyroxine Sodium | Levothyroxine Sodium | 17 | 1,218 | $146.07 | โ |
| Bupropion Xl | Bupropion Hcl | 14 | 1,020 | $373.83 | โ |
| Metformin Hcl | Metformin Hcl | 12 | 840 | $17.02 | โ |
| Bupropion Hcl | Bupropion Hcl | 12 | 660 | $459.62 | โ |
| Vitamin D2 | Ergocalciferol (Vitamin D2) | 12 | 1,020 | $126.21 | โ |
| Jardiance | Empagliflozin | 12 | 1,080 | $21,119.89 | โ |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2023-08-18NUCC Taxonomy Code: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
NUCC Taxonomy Code: 163W00000X
(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive either a diploma from a hospital program, an associate degree in nursing (A.D.N.) or a Bachelor of Science degree in nursing (B.S.N.), who is licensed or certified by the state, and is practicing within the scope of that license or certification. R.N.'s assist patient in recovering and maintaining their physical or mental health. They assist physicians during treatments and examinations and administer medications. (2) A provider who is trained and educated in a formal nursing education program at an accredited school of nursing, passes a national certification examination, and is licensed by the state to practice nursing. The individual provides nursing services to patients or clients in areas such as health promotion, disease prevention, acute and chronic care and restoration and maintenance of health across the life span.
NUCC Taxonomy Code: 363LF0000X
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NURSE PRACTITIONER
I20210317000015
IL
2466868492
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Dupage Medical Group Ltd
30 Stratford Dr, Bloomingdale, IL 601082201
Phone: 6308932210
Dupage Medical Group Ltd
1325 N Meacham Rd, Schaumburg, IL 601734824
Phone: 6304699200
Dupage Medical Group Ltd
2100 Glenwood Ave, Joliet, IL 604355487
Phone: 8157252121
Dupage Medical Group Ltd
430 Warrenville Rd, Lisle, IL 605321348
Phone: 6304326180
Dupage Medical Group Ltd
40 S Clay St, Hinsdale, IL 605213257
Phone: 6304326848
Dupage Medical Group Ltd
430 Pennsylvania Ave, Glen Ellyn, IL 601374464
Phone: 6304699200
Dupage Medical Group Ltd
25 N Winfield Rd, Winfield, IL 601901222
Secondary Practice Locations
2850 W 95th St
Evergreen Park, IL 608052735
Phone: 7082294041
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine
Doctor of Osteopathic Medicine (D.O.)
Physician Assistant
Physician Assistant
Nurse Practitioner
Family Nurse Practitioner (Certified)
Nurse Practitioner
Family Nurse Practitioner
Family Medicine
Doctor of Osteopathic Medicine (D.O.)
Dietitian, Registered
Master of Science, Registered Dietitian Nutritionist, Licensed Dietitian Nutritionist
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 3011 BUTTERFIELD RD STE 240, OAK BROOK, IL 605233132 (Tel: 6303483840)
Registered at PO BOX 713260, CHICAGO, IL 606771260 (Tel: 6304699200)
Recorded as MARIA WOLTER, APN
Registered at 6830 CARPENTER ST, DOWNERS GROVE, IL 605163435 (Tel: 6306399101)
Recorded as MARIA WOLTER
NPI status registered as active in NPPES database
Registered at 2850 W 95TH ST, EVERGREEN PARK, IL 608052735 (Tel: 7082294041)
Registered at 2833 N BURLING ST APT GN, CHICAGO, IL 606575299 (Tel: 6306399101)
Recorded as MARIA MASCITTI
Registered Nurse (license number reported to NPPES: IL 041.422557)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Nurse Practitioners in Oak Brook
- Claire Curran, FNP-C
- Dr. Alexandria Tarvainis, DNP, FNP-BC
- Erin Burke, CNP
- Lu Ying Hei, NURSE PRACTITIONER
- Nidhi Mittal, APN
- Dhruvi Patel
Mailing Address
Po Box 713260
Chicago, IL 606771260
Phone: 6304699200