Allysa Evelyn Chadderdon , PA
Physician Assistant • Methuen, MA
5 Branch St Ste 100
Methuen, MA 018441979
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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Allysa Chadderdon is listed in NPPES under Physician Assistant.
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NPI assigned on September 5, 2012; this date does not establish years in practice.
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Published CMS data list 293 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:
- Letrozole — 40 prescription fills, including refills.
- Lenalidomide — 33 prescription fills, including refills.
- Hydroxyurea — 31 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 13 records in the table · Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 60% of clinicians listed under Physician Assistant in Massachusetts (2024, 2,255 clinicians with data). Median for this group: 175. Middle half: 52 to 564.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 27 in 2020 to 293 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
5 Branch St Ste 100
Methuen, MA 018441979
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
465 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
$1,073,390 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.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021–2025.
NPI first issued
2012
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.
Enrolled in Medicare (PECOS)
Allysa Chadderdon 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 Allysa Chadderdon 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 Methuen and Massachusetts
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 Massachusetts (2024, 2,255 clinicians with data). Median for this group: 175. Middle half: 52 to 564.
Too few clinicians listed under Physician Assistant in Methuen have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 95% of clinicians listed under Physician Assistant in Massachusetts (2024, 2,255 clinicians with data). Median for this group: $2,484. Middle half: $458 to $50,541.
Too few clinicians listed under Physician Assistant in Methuen have Medicare Part D data for 2024 to compare.
13 active clinicians are listed under Physician Assistant with a practice address in Methuen, MA (4,715 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Methuen
7.7% of these 13 clinicians have the CMS telehealth indicator.
23.1% of these 13 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
Medicare Part D prescriptions increased 985% from 27 in 2020 to 293 in 2024.
- 2020: 27
- 2021: 71
- 2022: 32
- 2023: 92
- 2024: 293
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30-day fills
30-day fills increased 1621% from 27 in 2020 to 465 in 2024.
- 2020: 27
- 2021: 73
- 2022: 33
- 2023: 170
- 2024: 465
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Part D drug cost
Part D drug cost went from $264 in 2020 to $1,073,390 in 2024.
- 2020: $264
- 2021: $64,080
- 2022: $9,758
- 2023: $172,022
- 2024: $1,073,390
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.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Letrozole | Letrozole | 40 | 2,580 | $821.81 | 17 |
| Lenalidomide | Lenalidomide | 33 | 889 | $369,790.79 | — |
| Hydroxyurea | Hydroxyurea | 31 | 2,712 | $1,006.32 | 11 |
| Prednisone | Prednisone | 30 | 930 | $210.43 | 14 |
| Oxycodone Hcl | Oxycodone Hcl | 28 | 602 | $385.18 | 13 |
| Anastrozole | Anastrozole | 21 | 1,890 | $338.77 | — |
| Acyclovir | Acyclovir | 18 | 900 | $188.19 | — |
| Eliquis | Apixaban | 18 | 705 | $14,213.07 | — |
| Ondansetron Odt | Ondansetron | 17 | 130 | $93.26 | 16 |
| Pomalyst | Pomalidomide | 15 | 420 | $340,371.79 | — |
| Calquence | Acalabrutinib Maleate | 15 | 450 | $153,471.58 | — |
| Revlimid | Lenalidomide | 14 | 392 | $192,415.99 | — |
| Prochlorperazine Maleate | Prochlorperazine Maleate | 13 | 115 | $82.53 | — |
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: 2022-10-21NUCC 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.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PHYSICIAN ASSISTANT
I20131114000029
MA
3375793839
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
RNMSNEDCENFNPBC
Internal Medicine - Medical Oncology
Internal Medicine - Medical Oncology
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 5 BRANCH ST STE 100, METHUEN, MA 018441979 (Tel: 9786202020)
Registered at 5 BRANCH ST STE 100, METHUEN, MA 018441979 (Tel: 9786202020)
Recorded as ALLYSA CHADDERDON, PA
NPI status registered as active in NPPES database
Registered at 330 BROOKLINE AVE, BOSTON, MA 022155400 (Tel: 6176677978)
Registered at 330 BROOKLINE AVE, BOSTON, MA 022155400 (Tel: 6176677978)
Recorded as ALLYSA JANKOWSKI, PA
Physician Assistant (license number reported to NPPES: MA PA4814)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Methuen
- Michelle Regis, PA-C
- Kiely Gamelin, PA-C
- Rima Zalaket, PA
- Maria Rachidi, PA
- Dr. Melissa Broderick, DC, PA-C
- Claire Melley
More public profiles in Massachusetts
Directory navigation, in NPI number order.
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- Michael Lyons, MD Pediatrics · Leominster
- Odeta Hysenaj, PA Physician Assistant · Rochdale
- Jordan Blinder, MD Anesthesiology · Springfield
- Christopher Ogilvy, MD Neurological Surgery · Boston
- Susan Anti, MD Anesthesiology · Holyoke
- Jon Dorfman, MD Surgery - Surgical Critical Care · Worcester
- Michael Reinhorn, MD Surgery · Wellesley
- Nicolas Bu-Saba, MD Otolaryngology · Boston
- Melissa Fischer, MD Internal Medicine · Worcester
- William Durbin, MD Pediatrics - Pediatric Infectious Diseases · Worcester
- Iris Wong, NP Nurse Practitioner - Family · North Quincy
Mailing Address
5 Branch St Ste 100
Methuen, MA 018441979
Phone: 9786202020