Katherine Cooley , PA-C
Physician Assistant • St Charles, IL
2000 W Main St Ste M
St Charles, IL 601741773
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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Katherine Cooley is listed in NPPES under Physician Assistant.
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NPI assigned on January 15, 2024; this date does not establish years in practice.
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Published CMS data list 128 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Prednisone — 21 prescription fills, including refills.
- Ofloxacin — 18 prescription fills, including refills.
- Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) — 16 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 9 records in the table · Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 75% of clinicians listed under Physician Assistant in St Charles, IL (2024, 14 clinicians with data). Median for this group: 265. Middle half: 136 to 583.
Fewer Part D prescriptions than 60% 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 – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
Practice Location & Contact Primary Location
2000 W Main St Ste M
St Charles, IL 601741773
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.
30-day fills
128 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
$2,331 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 – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $40.13 across 2 records.
By nature of payment
- Food and Beverage: $40.13 across 2 records.
Reporting-company totals
- ABBVIE INC.: $22.94 across 1 record.
- Pfizer Inc.: $17.19 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
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.
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, “Does your provider accept Medicare as full payment?”
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.
Compared with the same specialty in St Charles and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 75% of clinicians listed under Physician Assistant in St Charles, IL (2024, 14 clinicians with data). Median for this group: 265. Middle half: 136 to 583.
Fewer Part D prescriptions than 60% 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 60% of clinicians listed under Physician Assistant in St Charles, IL (2024, 14 clinicians with data). Median for this group: $2,566. Middle half: $1,652 to $6,950.
Close to the middle for 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.
19 active clinicians are listed under Physician Assistant with a practice address in St Charles, IL (4,929 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in St Charles
52.6% of these 19 clinicians have the CMS telehealth indicator.
73.7% of these 19 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)
Industry payments (Open Payments) went from $22.29 in 2024 to $40.13 in 2025.
- 2024: $22.29
- 2025: $40.13
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 · 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 – December 31, 2025): fewer than 11 records totaling $40.13.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
UBRELVY | General | $22.94 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
PAXLOVID | General | $17.19 |
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 |
|---|---|---|---|---|---|
| Prednisone | Prednisone | 21 | 145 | $33.28 | 21 |
| Ofloxacin | Ofloxacin | 18 | 188 | $277.90 | 16 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 16 | 160 | $102.08 | 16 |
| Cephalexin | Cephalexin | 15 | 105 | $40.00 | 15 |
| Azithromycin | Azithromycin | 12 | 60 | $49.85 | 12 |
| Nitrofurantoin Mono-Macro | Nitrofurantoin Monohyd/M-Cryst | 12 | 84 | $100.85 | 12 |
| Cefdinir | Cefdinir | 12 | 120 | $254.76 | 11 |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 11 | 75 | $35.87 | — |
| Paxlovid | Nirmatrelvir/Ritonavir | 11 | 55 | $1,436.12 | 11 |
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: 2024-01-14NUCC 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.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Family Medicine
Doctor of Osteopathic Medicine (D.O.)
Physician Assistant
Career & Practice History
NPI enumerated January 15, 2024.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from February 2024 to August 2026.
NPI Administrative Meta
Other Physician Assistants in St Charles
- Sean Gallagher, PA-C
- Brooke Johnson, PA-C
- Amy Frazer, PA-C
- Steve Thiel, PA-C
- Jacob Boehm, PA-C
- Anna Reinke, PA
Mailing Address
31908 Village Green Blvd
Warrenville, IL 605555904
Phone: 2244259090