Amanda Irene Diffin , PA-C
Physician Assistant • Leominster, MA
100 Hospital Rd Ste 4
Leominster, MA 014532253
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 June 17, 2019; this date does not establish years in practice.
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Published CMS data list 163 Original Medicare Part B services in 2020.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Published rows only; this is not a quality measure.
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Published Part B service records, 2020:
- 99223 — Initial hospital care with moderate level of medical decision making: 86 service units.
- 99232 — Subsequent hospital care with moderate levelof medical decision making: 62 service units.
- 99233 — Subsequent hospital care with moderate levelof medical decision making: 15 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2019 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2020). CPT notice
See the full table · Guide: How to read Medicare Part B data
Practice Location & Contact Primary Location
100 Hospital Rd Ste 4
Leominster, MA 014532253
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Leominster, MA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 2 distinct group names: Family Medical And Maternity Care Pc; Pend Oreille County Public Hospital District No 1. 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
2019
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $21,846 in 2020
The total amount Medicare approved for these services in 2020. 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 – by Provider and Service, 2020.
Paid by Medicare
About $17,471 in 2020
The part of the Medicare-allowed amount that Medicare itself paid in 2020, 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 – by Provider and Service, 2020.
Open Payments general payments, program year 2025
All general payments: $520.41 across 24 records.
By nature of payment
- Food and Beverage: $520.41 across 24 records.
Reporting-company totals (3 largest of 15)
- ABBVIE INC.: $110.96 across 6 records.
- Eli Lilly and Company: $58.29 across 3 records.
- Novo Nordisk Inc: $40.27 across 2 records.
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
7 years (graduated 2019)
CMS Doctors and Clinicians data list 2019 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
2019
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, “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)
Amanda Diffin 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 Amanda Diffin 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 Leominster and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Amanda Diffin are from 2020.
24 active clinicians are listed under Physician Assistant with a practice address in Leominster, MA (4,715 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Leominster
12.5% of these 24 clinicians have the CMS telehealth indicator.
66.7% of these 24 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
CMS data for Medicare Part B services are available for 2020 only.
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Medicare-allowed amount
CMS data for Medicare-allowed amount are available for 2020 only.
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Paid by Medicare
CMS data for Medicare payment amount are available for 2020 only.
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $65.25 in 2021 to $520.41 in 2025.
- 2021: $65.25
- 2022: $115.29
- 2023: $132.07
- 2024: $312.15
- 2025: $520.41
Sources: CMS Medicare Physician & Other Practitioners (2020), 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): 24 records totaling $520.41.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Madrigal Pharmaceuticals |
Food and Beverage
In-kind items and services
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REZDIFFRA | General | $38.15 |
| ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) |
Food and Beverage
In-kind items and services
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CAPLYTA | General | $29.96 |
| Astellas Pharma US Inc |
Food and Beverage
In-kind items and services
|
Veozah | General | $26.41 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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SPRAVATO | General | $25.81 |
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
|
SHINGRIX | General | $24.99 |
| HOLOGIC INC |
Food and Beverage
In-kind items and services
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APTIMA | General | $24.30 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
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NURTEC ODT | General | $23.42 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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VRAYLAR | General | $23.36 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
VRAYLAR | General | $22.78 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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The Cologuard Plus Collection Kit | General | $21.06 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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— | General | $20.89 |
| Axsome Therapeutics, Inc. |
Food and Beverage
In-kind items and services
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Auvelity | General | $20.83 |
| ALK-Abello, Inc |
Food and Beverage
In-kind items and services
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NEFFY | General | $20.66 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $20.36 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
|
ZEPBOUND | General | $20.35 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
|
— | General | $19.38 |
| Inspire Medical Systems, Inc. |
Food and Beverage
In-kind items and services
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INSPIRE | General | $19.13 |
| Organon LLC |
Food and Beverage
In-kind items and services
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NEXPLANON | General | $19.00 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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VRAYLAR | General | $18.71 |
| Eli Lilly and Company |
Food and Beverage
In-kind items and services
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MOUNJARO | General | $17.58 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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The Cologuard Plus Collection Kit | General | $17.17 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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VRAYLAR | General | $16.30 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
UBRELVY | General | $15.62 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
QULIPTA | General | $14.19 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2019 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 – by Provider and Service data, 2020; 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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99223
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
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86 | 81 | $979.52 | $188.59 |
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99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
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62 | 45 | $494.31 | $67.26 |
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99233
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
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15 | 11 | $300.00 | $97.16 |
Source: CMS Part B by Provider and Service, 2020; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2024-02-08NUCC 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.
NUCC 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
I20191104002595
MA
6800128240
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
Pend Oreille County Public Hospital District No 1
714 W Pine St, Newport, WA 991569046
Phone: 5094472441
Pend Oreille County Public Hospital District No 1
714 W Pine St, Newport, WA 991569046
Family Medical And Maternity Care Pc
87 N Main St, Leominster, MA 014535507
Phone: 9785348701
Secondary Practice Locations
87 N Main St
Leominster, MA 014535507
Phone: 9785348701
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Pediatrics
Doctor of Medicine (M.D.)
Pediatrics
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 87 N MAIN ST, LEOMINSTER, MA 014535507 (Tel: 9785348701)
Recorded as AMANDA DIFFIN, PA-C
Physician Assistant (license number reported to NPPES: MA PA7139)
Registered at 100 HOSPITAL RD STE 4, LEOMINSTER, MA 014532253 (Tel: 9785146300)
Registered at 100 HOSPITAL RD STE 4, LEOMINSTER, MA 014532253 (Tel: 9785146300)
NPI status registered as active in NPPES database
Registered at 85 PATTON RD, DEVENS, MA 014344401 (Tel: 9786155200)
Registered at 98 FITCH RD, LANCASTER, MA 015231706 (Tel: 9788359927)
Recorded as AMANDA GUSTAFSON, PA-C
Physician Assistant
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Leominster
- Devon Joyce
- Susan Salander, PA-C
- Alice Mccarthy, PA
- Sadie Marciano, PA-S
- Alison Bird, PA
- Kalyn Barger, PA-C
Mailing Address
87 N Main St
Leominster, MA 014535507
Phone: 9785348701