Margaret Walker , PA-C
Physician Assistant β’ Chicago, IL
675 N Saint Clair St Ste 19-100
Chicago, IL 606115969
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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Margaret Walker is listed in NPPES under Physician Assistant.
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NPI assigned on March 4, 2024; this date does not establish years in practice.
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Published CMS data list 43 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Bumetanide β 17 prescription fills, including refills.
- Metoprolol Succinate β 13 prescription fills, including refills.
- Spironolactone β 13 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table Β· Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 70% 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 80% of clinicians listed under Physician Assistant in Illinois (2024, 2,668 clinicians with data). Median for this group: 203. Middle half: 67 to 595.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
Practice Location & Contact Primary Location
675 N Saint Clair St Ste 19-100
Chicago, IL 606115969
CMS Doctors and Clinicians lists 1 group name: Northwestern Medical Faculty Foundation. 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
2023
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
73 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
$460 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 β by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $264.27 across 12 records.
By nature of payment
- Food and Beverage: $264.27 across 12 records.
Reporting-company totals (3 largest of 7)
- ZOLL Services LLC (A/K/A ZOLL LifeCor Corp): $95.11 across 5 records.
- Boehringer Ingelheim Pharmaceuticals, Inc.: $40.83 across 2 records.
- Kestra Medical Technology Services, Inc.: $32.36 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
3 years (graduated 2023)
CMS Doctors and Clinicians data list 2023 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
2024
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, βDoes your provider accept Medicare as full payment?β
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)
Margaret Walker 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 Margaret Walker 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 D prescriptions
Fewer Part D prescriptions than 70% 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 80% 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 70% 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 75% 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 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)
CMS data for industry payments (Open Payments) are available for 2025 only.
Sources: 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 Β· 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 β December 31, 2025): 12 records totaling $264.27.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Kestra Medical Technology Services, Inc. |
Food and Beverage
Cash or cash equivalent
|
Assure WCD | General | $32.36 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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ELIQUIS | General | $28.63 |
| AstraZeneca Pharmaceuticals LP |
Food and Beverage
In-kind items and services
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WAINUA | General | $24.95 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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JARDIANCE | General | $24.73 |
| ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) |
Food and Beverage
Cash or cash equivalent
|
LifeVest | General | $23.23 |
| SCPHARMACEUTICALS INC. |
Food and Beverage
In-kind items and services
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FUROSCIX | General | $22.90 |
| ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) |
Food and Beverage
Cash or cash equivalent
|
LifeVest | General | $21.39 |
| ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) |
Food and Beverage
Cash or cash equivalent
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LifeVest | General | $20.83 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
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VERQUVO | General | $19.49 |
| ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) |
Food and Beverage
Cash or cash equivalent
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LifeVest | General | $17.14 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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JARDIANCE | General | $16.10 |
| ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) |
Food and Beverage
Cash or cash equivalent
|
LifeVest | General | $12.52 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
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 |
|---|---|---|---|---|---|
| Bumetanide | Bumetanide | 17 | 617 | $233.70 | 11 |
| Metoprolol Succinate | Metoprolol Succinate | 13 | 690 | $140.66 | β |
| Spironolactone | Spironolactone | 13 | 810 | $85.63 | β |
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: 2024-08-08NUCC 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
I20240510001531
IL
7719328517
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
Northwestern Medical Faculty Foundation
251 E Huron St, Chicago, IL 606112908
Northwestern Medical Faculty Foundation
1333 W Belmont Ave, Chicago, IL 606575785
Northwestern Medical Faculty Foundation
1630 Sherman Ave, Evanston, IL 602013711
Northwestern Medical Faculty Foundation
251 E Huron, Chicago, IL 606112908
Northwestern Medical Faculty Foundation
636 Raymond Dr, Naperville, IL 605639789
Phone: 6304162300
Northwestern Medical Faculty Foundation
660 N Westmoreland Rd, Lake Forest, IL 600451673
Phone: 3129266146
Northwestern Medical Faculty Foundation
4445 W Irving Park Rd, Chicago, IL 606412808
Northwestern Medical Faculty Foundation
675 N St Clair, Chicago, IL 606115975
Northwestern Medical Faculty Foundation
675 N Saint Clair St, Chicago, IL 606115975
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 - Cardiovascular Disease
Doctor of Medicine (M.D.)
Internal Medicine - Cardiovascular Disease
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Nurse Practitioner
Advanced Practice Registered Nurse, Certified Nurse Practitioner
Physician Assistant
Physician Assistant (Certified)
Nurse Practitioner - Acute Care
Registered Nurse, Certified Nurse Practitioner
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 675 N SAINT CLAIR ST STE 19-100, CHICAGO, IL 606115969 (Tel: 3126643278)
Registered at 675 N SAINT CLAIR ST STE 19-100, CHICAGO, IL 606115969 (Tel: 3126643278)
Recorded as MARGARET WALKER, PA-C
NPI status registered as active in NPPES database
Registered at 251 E HURON ST, CHICAGO, IL 606112908 (Tel: 3129262000)
Registered at 2725 BRENTWOOD RD, COLUMBUS, OH 432092218 (Tel: 6149352549)
Recorded as MARGARET WALKER
Physician Assistant (license number reported to NPPES: IL 085.010314)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Chicago
- Daniel Czarnowski, MS
- Kseniia Sosinovych, PA-C
- Debra Marinovic, PA
- Vanessa Hoppner, PA-C
- Hailey Battaglia Knight, PA-C
- Nathan Warner, PA
Mailing Address
675 N Saint Clair St Ste 19-100
Chicago, IL 606115969
Phone: 3126643278