Michael Mesirow , PA-C
Physician Assistant โข Berwyn, IL
2550 Oak Park Ave
Berwyn, IL 604024661
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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Michael Mesirow is listed in NPPES under Physician Assistant.
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NPI assigned on April 5, 2018; this date does not establish years in practice.
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Published CMS data list 236 Original Medicare Part B services in 2023.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023. Published rows only; this is not a quality measure.
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Published Part B service records, 2023:
- 99203 โ New patient outpatient office visit: 50 service units.
- 99213 โ Established patient outpatient office visit: 50 service units.
- 87811 โ Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19): 26 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2022 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2023). 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 60 Medicare Part D prescriptions, including refills, in 2023.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2023. Published rows only; this is not a quality measure.
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Published Part D records, 2023:
- Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) โ 18 prescription fills, including refills.
- Prednisone โ 16 prescription fills, including refills.
- Doxycycline Hyclate โ 15 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2023. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 4 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Medicare Part B services went from 65 in 2020 to 236 in 2023.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2023.
Practice Location & Contact Primary Location
2550 Oak Park Ave
Berwyn, IL 604024661
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $20,496 in 2023
The total amount Medicare approved for these services in 2023. 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, 2023.
Paid by Medicare
About $14,474 in 2023
The part of the Medicare-allowed amount that Medicare itself paid in 2023, 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, 2023.
30-day fills
60 standardized 30-day fills in 2023
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
$701 in 2023
The total cost of these prescriptions in 2023, 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, 2023.
Open Payments general payments, program year 2025
All general payments: $154.41 across 8 records.
By nature of payment
- Food and Beverage: $154.41 across 8 records.
Reporting-company totals
- Eli Lilly and Company: $128.12 across 7 records.
- Exact Sciences Corporation: $26.29 across 1 record.
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).
NPI first issued
2018
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Michael Mesirow 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 Michael Mesirow as eligible to order or refer durable medical equipment (DME) 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 Berwyn and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Michael Mesirow are from 2023.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Michael Mesirow are from 2023.
16 active clinicians are listed under Physician Assistant with a practice address in Berwyn, IL (4,929 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Berwyn
12.5% of these 16 clinicians have the CMS telehealth indicator.
50% of these 16 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 263% from 65 in 2020 to 236 in 2023.
- 2020: 65
- 2021: 176
- 2022: 303
- 2023: 236
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Medicare-allowed amount
Medicare-allowed amount increased 321% from $4,870 in 2020 to $20,496 in 2023.
- 2020: $4,870
- 2021: $17,157
- 2022: $24,865
- 2023: $20,496
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Paid by Medicare
Paid by Medicare increased 229% from $4,401 in 2020 to $14,474 in 2023.
- 2020: $4,401
- 2021: $15,032
- 2022: $21,467
- 2023: $14,474
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 81% from 318 in 2019 to 60 in 2023.
- 2019: 318
- 2020: 173
- 2021: 19
- 2022: 80
- 2023: 60
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30-day fills
30-day fills decreased 92% from 733 in 2019 to 60 in 2023.
- 2019: 733
- 2020: 469
- 2021: 19
- 2022: 80
- 2023: 60
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Part D drug cost
Part D drug cost decreased 86% from $5,032 in 2019 to $701 in 2023.
- 2019: $5,032
- 2020: $3,135
- 2021: $180
- 2022: $687
- 2023: $701
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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2025 only.
Sources: CMS Medicare Physician & Other Practitioners (2023), CMS Medicare Part D Prescribers (2023), 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): fewer than 11 records totaling $154.41.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $26.73 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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Cologuard Collection Kit | General | $26.29 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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ZEPBOUND | General | $25.46 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $24.11 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $20.05 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $12.89 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $10.56 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $8.32 |
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 2019โ2022 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, 2020โ2023; 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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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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50 | 50 | $185.00 | $101.17 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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50 | 48 | $125.78 | $80.31 |
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87811
Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19)
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26 | 25 | $65.00 | $40.55 |
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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
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21 | 21 | $281.00 | $149.27 |
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81003
Automated urinalysis test
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20 | 19 | $15.10 | $2.20 |
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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
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20 | 20 | $182.00 | $113.55 |
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99284
Emergency department visit with moderate level of medical decision making
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19 | 19 | $365.00 | $102.21 |
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99285
Emergency department visit with high level of medical decision making
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19 | 19 | $539.00 | $149.06 |
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71046
X-ray of chest, 2 views
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11 | 11 | $63.18 | $13.04 |
Source: CMS Part B by Provider and Service, 2023; 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 2023.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 18 | 125 | $165.22 | 18 |
| Prednisone | Prednisone | 16 | 77 | $34.17 | 16 |
| Doxycycline Hyclate | Doxycycline Hyclate | 15 | 105 | $189.85 | 15 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 11 | 231 | $311.55 | 11 |
Source: CMS Part D by Provider and Drug, 2023; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-03-05NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20180522000572
IL
2062777048
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Family Nurse Practitioner
Nurse Practitioner - Family
Family Nurse Practitioner
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 2550 OAK PARK AVE, BERWYN, IL 604024661 (Tel: 7085756757)
Registered at 618 PADDOCK LN, LIBERTYVILLE, IL 600483733 (Tel: 7735047075)
Registered at 1600 N RANDALL RD STE 400, ELGIN, IL 601237805 (Tel: 8473818899)
Registered at 1600 N RANDALL RD STE 400, ELGIN, IL 601237805 (Tel: 8473818899)
Registered at 10400 HALIGUS RD, HUNTLEY, IL 601429553 (Tel: 2246540100)
Registered at 10400 HALIGUS RD, HUNTLEY, IL 601429553 (Tel: 2246540100)
Physician Assistant (license number reported to NPPES: IL 085.006505)
Physician Assistant (license number reported to NPPES: WI 4828-23)
Registered at 248 MCHENRY ST, BURLINGTON, WI 53105 (Tel: 2627678000)
Registered at 248 MCHENRY ST, BURLINGTON, WI 531051828 (Tel: 2627678000)
NPI status registered as active in NPPES database
Registered at 1425 N HUNT CLUB RD STE 100, GURNEE, IL 600312632 (Tel: 8475482200)
Registered at 1425 N HUNT CLUB RD STE 100, GURNEE, IL 600312632 (Tel: 8475482865)
Recorded as MICHAEL MESIROW, PA-C
Physician Assistant (license number reported to NPPES: IL 085.006505)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Berwyn
- Brigette Chelchowski, PA-C
- Frank Perez, PA-C
- Lidia Pomaville, PA-C
- Sumayyah Ahmed, PA-C
- Mustafa Zakaria, PA-C
- Jennifer Yang, PA-C
Mailing Address
618 Paddock Ln
Libertyville, IL 600483733
Phone: 7735047075