Mayson Lyn Marcy , PA-C
Physician Assistant โข Chicago, IL
2418 N Ashland Ave
Chicago, IL 606142021
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 February 27, 2023; this date does not establish years in practice.
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Published CMS data list 422 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:
- 99213 โ Established patient outpatient office visit: 81 service units.
- 90480 โ Admn sarscov2 vacc 1 dose: 69 service units.
- 91320 โ Sarscv2 vac 30mcg trs-suc im: 69 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 58 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:
- Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) โ 20 prescription fills, including refills.
- Nitrofurantoin Mono-Macro (Nitrofurantoin Monohyd/M-Cryst) โ 14 prescription fills, including refills.
- Azithromycin โ 12 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 4 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 80% of clinicians listed under Physician Assistant in Chicago, IL (2024, 588 clinicians with data). Median for this group: 110. Middle half: 45 to 306.
More Medicare Part B services than 65% of clinicians listed under Physician Assistant in Illinois (2024, 2,422 clinicians with data). Median for this group: 212. Middle half: 76 to 548.
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 319 in 2023 to 422 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023โ2024.
Practice Location & Contact Primary Location
2418 N Ashland Ave
Chicago, IL 606142021
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
2022
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
196 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 $29,269 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 $26,212 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
58 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
$279 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: $341.12 across 14 records.
By nature of payment
- Food and Beverage: $341.12 across 14 records.
Reporting-company totals (3 largest of 10)
- ABBVIE INC.: $55.63 across 2 records.
- Eli Lilly and Company: $53.65 across 2 records.
- Teva Pharmaceuticals USA, Inc.: $41.26 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).
Years since graduation
4 years (graduated 2022)
CMS Doctors and Clinicians data list 2022 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
2023
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.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
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)
Mayson Marcy 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 Mayson Marcy 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 Chicago and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 80% of clinicians listed under Physician Assistant in Chicago, IL (2024, 588 clinicians with data). Median for this group: 110. Middle half: 45 to 306.
More Medicare Part B services than 65% of clinicians listed under Physician Assistant in Illinois (2024, 2,422 clinicians with data). Median for this group: 212. Middle half: 76 to 548.
Medicare-allowed amount
A higher Medicare-allowed amount than 80% of clinicians listed under Physician Assistant in Chicago, IL (2024, 588 clinicians with data). Median for this group: $9,495. Middle half: $3,730 to $23,698.
A higher Medicare-allowed amount than 65% of clinicians listed under Physician Assistant in Illinois (2024, 2,422 clinicians with data). Median for this group: $16,580. Middle half: $6,650 to $35,717.
Paid by Medicare
A higher Medicare payment amount than 85% of clinicians listed under Physician Assistant in Chicago, IL (2024, 588 clinicians with data). Median for this group: $7,176. Middle half: $2,794 to $17,605.
A higher Medicare payment amount than 70% of clinicians listed under Physician Assistant in Illinois (2024, 2,422 clinicians with data). Median for this group: $12,415. Middle half: $4,894 to $26,472.
Medicare Part D prescriptions
Fewer Part D prescriptions than 65% of clinicians listed under Physician Assistant in Chicago, IL (2024, 651 clinicians with data). Median for this group: 116. Middle half: 41 to 337.
Fewer Part D prescriptions than 75% of clinicians listed under Physician Assistant in Illinois (2024, 2,668 clinicians with data). Median for this group: 203. Middle half: 67 to 595.
Part D drug cost
A lower Part D drug cost than 75% of clinicians listed under Physician Assistant in Chicago, IL (2024, 651 clinicians with data). Median for this group: $1,977. Middle half: $320 to $34,048.
A lower Part D drug cost than 80% of clinicians listed under Physician Assistant in Illinois (2024, 2,668 clinicians with data). Median for this group: $3,018. Middle half: $535 to $48,132.
1,446 active clinicians are listed under Physician Assistant with a practice address in Chicago, IL (4,929 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Chicago
17.4% of these 1,446 clinicians have the CMS telehealth indicator.
63.6% of these 1,446 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 32% from 319 in 2023 to 422 in 2024.
- 2023: 319
- 2024: 422
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Medicare-allowed amount
Medicare-allowed amount increased 41% from $20,699 in 2023 to $29,269 in 2024.
- 2023: $20,699
- 2024: $29,269
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Paid by Medicare
Paid by Medicare increased 31% from $19,994 in 2023 to $26,212 in 2024.
- 2023: $19,994
- 2024: $26,212
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Medicare Part D prescriptions
CMS data for Part D prescriptions are available for 2024 only.
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30-day fills
CMS data for 30-day fills are available for 2024 only.
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Part D drug cost
CMS data for Part D drug cost are available for 2024 only.
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $19.74 in 2023 to $341.12 in 2025.
- 2023: $19.74
- 2025: $341.12
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): 14 records totaling $341.12.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Teva Pharmaceuticals USA, Inc. |
Food and Beverage
In-kind items and services
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AJOVY | General | $41.26 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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UBRELVY | General | $31.27 |
| Cleerly, Inc. |
Food and Beverage
Cash or cash equivalent
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Cleerly Ischemia | General | $30.42 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $27.12 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $26.53 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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VIBERZI | General | $24.36 |
| Corium, LLC |
Food and Beverage
In-kind items and services
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Azstarys | General | $23.99 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
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OTEZLA | General | $23.02 |
| Noven Therapeutics, LLC |
Food and Beverage
In-kind items and services
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Xelstrym | General | $20.27 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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NURTEC ODT | General | $19.74 |
| Bayer Healthcare Pharmaceuticals Inc. |
Food and Beverage
In-kind items and services
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Mirena | General | $19.04 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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NURTEC ODT | General | $18.81 |
| Collegium Pharmaceutical, Inc. |
Food and Beverage
Cash or cash equivalent
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Jornay PM | General | $17.76 |
| Collegium Pharmaceutical, Inc. |
Food and Beverage
Cash or cash equivalent
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Jornay PM | General | $17.53 |
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 2022โ2023 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, 2023โ2024; 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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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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81 | 61 | $115.00 | $70.20 |
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90480
Admn sarscov2 vacc 1 dose
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69 | 66 | $40.00 | $39.20 |
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91320
Sarscv2 vac 30mcg trs-suc im
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69 | 66 | $142.68 | $136.79 |
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90662
Influenza vaccine split virus, preservative free
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62 | 62 | $95.00 | $81.82 |
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G0008
Administration of influenza virus vaccine
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61 | 61 | $35.00 | $29.78 |
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87428
Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza
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32 | 25 | $158.00 | $60.27 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
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20 | 15 | $99.00 | $39.48 |
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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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16 | 16 | $146.00 | $86.80 |
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69210
Removal of impacted ear wax
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12 | 12 | $99.00 | $36.90 |
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 |
|---|---|---|---|---|---|
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 20 | 141 | $120.84 | 20 |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 14 | 70 | $123.41 | โ |
| Azithromycin | Azithromycin | 12 | 57 | $34.30 | โ |
| Paxlovid | Nirmatrelvir/Ritonavir | 12 | 60 | $0.00 | 12 |
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: 2025-10-03NUCC 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
I20250905001191
IL
9133580954
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.
Physician Assistant - Medical
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 2418 N ASHLAND AVE, CHICAGO, IL 606142021 (Tel: 7739008330)
Registered at 868 N WELLS ST APT 903, CHICAGO, IL 606103675 (Tel: 6154401283)
Physician Assistant (license number reported to NPPES: IL 085011338)
Registered at 2131 ABBOTT MARTIN RD, NASHVILLE, TN 372152615 (Tel: 6155159905)
Registered at 2620 ELM HILL PIKE, NASHVILLE, TN 372143108 (Tel: 6154401283)
NPI status registered as active in NPPES database
Registered at 1502 FRANKLIN AVE, NASHVILLE, TN 372062520 (Tel: 6154401283)
Registered at 1502 FRANKLIN AVE, NASHVILLE, TN 372062520 (Tel: 6154401283)
Recorded as MAYSON MARCY, PA-C
Physician Assistant (license number reported to NPPES: TN 5459)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Chicago
- Stephanie Strahler
- Gregory Pohrebny
- Robin Schemmel, PA-C
- Jenny Jothiyood
- Heather Gannon-Stringer, PA
- Diego Rivera, PA-C
Mailing Address
868 N Wells St Apt 903
Chicago, IL 606103675
Phone: 6154401283