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Mackenzie Ryan Monahan , PA-C, MPAS

Physician Assistant • Windsor, VT

Active NPI 1972920619 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

289 County Rd
Windsor, VT 050899000

Call 8026747300 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

289 County Rd

Windsor, VT 050899000

Telephone 8026747300
Organization at the Same NPPES Address or Phone
Windsor Hospital Corporation Facility NPI 1558358747

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

CMS Doctors and Clinicians lists 1 group name: Windsor Hospital Corporation. 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

Graduation Year

2013

30-day fills

617 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

$3,457 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

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.

Industry payments (Open Payments)

No Open Payments records are listed for this clinician for 2021–2025.

Guide: How to read an Open Payments record

Years since graduation

13 years (graduated 2013)

CMS Doctors and Clinicians data list 2013 as the year this clinician finished professional 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

2014

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.

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?”

Guide: What Medicare assignment means

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.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Mackenzie Monahan 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.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Mackenzie Monahan 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.

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.

Guide: What ordering and referring status means

Compared with the same specialty in Windsor and Vermont

Billing and prescribing volume is not a quality rating.

Medicare Part D prescriptions

More Part D prescriptions than 60% of clinicians listed under Physician Assistant in Vermont (2024, 189 clinicians with data). Median for this group: 238. Middle half: 72 to 1,022.

Too few clinicians listed under Physician Assistant in Windsor have Medicare Part D data for 2024 to compare.

Part D drug cost

Close to the middle for clinicians listed under Physician Assistant in Vermont (2024, 189 clinicians with data). Median for this group: $4,008. Middle half: $557 to $91,661.

Too few clinicians listed under Physician Assistant in Windsor have Medicare Part D data for 2024 to compare.

6 active clinicians are listed under Physician Assistant with a practice address in Windsor, VT (321 in Vermont).

Addresses are self-reported to NPPES and may be out of date.

Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo · Report an error.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D · Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Doxycycline Monohydrate Doxycycline Monohydrate 43 272 $273.65 37
Atorvastatin Calcium Atorvastatin Calcium 30 2,340 $293.60 14
Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim 26 147 $107.02 25
Albuterol Sulfate Hfa Albuterol Sulfate 26 765 $923.09 21
Cephalexin Cephalexin 25 167 $190.55 21
Prednisone Prednisone 24 150 $30.16 16
Lisinopril Lisinopril 19 1,350 $105.67 —
Losartan Potassium Losartan Potassium 19 1,470 $227.31 11
Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav 19 171 $135.49 19
Fluconazole Fluconazole 15 105 $106.36 12
Cyclobenzaprine Hcl Cyclobenzaprine Hcl 15 148 $25.03 11
Simvastatin Simvastatin 14 1,260 $133.68 —
Amlodipine Besylate Amlodipine Besylate 14 840 $86.04 —
Naproxen Naproxen 14 140 $29.79 11
Levothyroxine Sodium Levothyroxine Sodium 13 1,170 $85.30 —
Azithromycin Azithromycin 12 60 $35.39 11
Hydrochlorothiazide Hydrochlorothiazide 12 887 $68.54 —
Ofloxacin Ofloxacin 12 91 $234.86 12
Sertraline Hcl Sertraline Hcl 11 510 $30.51 —
Metoprolol Succinate Metoprolol Succinate 11 690 $48.97 —
Omeprazole Omeprazole 11 870 $285.81 —

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

Physician Assistant Primary Specialty

NUCC Taxonomy Code: 363A00000X

License # reported to NPPES NH 1007

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.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Vermont State Medical Licensing Board.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - PHYSICIAN ASSISTANT

Medicare Enrollment ID

I20150109000320

Enrollment State Jurisdiction

VT

PECOS Control ID

1658595012

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

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

Windsor Hospital Corporation

289 County Rd, Windsor, VT 050899000

Phone: 8026747300

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

16 listed
Dr. Desiree Biesheuvel , MD

Psychiatry & Neurology - Child & Adolescent Psychiatry

NPI 1629066352

Doctor of Medicine (M.D.)

Joshua Cascadden , PA

Physician Assistant

NPI 1598900649

Physician Assistant

Dr. Lauren Chambers , DO, RMSK

Physical Medicine & Rehabilitation

NPI 1689088635

Doctor of Osteopathic Medicine (D.O.), RMSK

Dr. Alan Frascoia , MD

Psychiatry & Neurology - Child & Adolescent Psychiatry

NPI 1386905032

Doctor of Medicine (M.D.)

Dennis Heibein , CRNA, MSN

Nurse Anesthetist, Certified Registered

NPI 1528061942

Certified Registered Nurse Anesthetist, Master of Science in Nursing

David Keith , CRNA

Nurse Anesthetist, Certified Registered

NPI 1437160454

Certified Registered Nurse Anesthetist

Career & Practice History

NPI enumerated March 19, 2014.

No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1972920619
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: March 19, 2014
Last Update: December 05, 2014
Sole Proprietor: No

Other Physician Assistants in Windsor

Mailing Address

289 County Rd

Windsor, VT 050899000

Phone: 8026747300

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.