Dr. Holly S Mason , MD
Surgery โข Springfield, MA
100 Wason Avenue
Springfield, MA 011071179
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
-
NPI assigned on September 30, 2006; this date does not establish years in practice.
-
Published CMS data list 150 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
-
Published Part B service records, 2024:
- 19301 โ Partial removal of breast: 32 service units.
- 99213 โ Established patient outpatient office visit: 32 service units.
- 99205 โ New patient outpatient office visit: 28 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 6 records in the table ยท Guide: How to read Medicare Part B data
-
Published CMS data list 41 Medicare Part D prescriptions, including refills, in 2023.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2023. Published rows only; this is not a quality measure.
-
Published Part D records, 2023:
- Oxycodone Hcl โ 30 prescription fills, including refills.
- Anastrozole โ 11 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2023. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table ยท Guide: How to read Medicare Part D prescriber data
-
Close to the middle for Medicare Part B services among clinicians listed under Surgery in Springfield, MA (2024, 28 clinicians with data). Median for this group: 157. Middle half: 90 to 263.
Fewer Medicare Part B services than 65% of clinicians listed under Surgery in Massachusetts (2024, 438 clinicians with data). Median for this group: 221. Middle half: 112 to 421.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
-
Medicare Part B services went from 67 in 2020 to 150 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
100 Wason Avenue
Springfield, MA 011071179
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Baystate Medical Practices Inc. 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
University Of Vermont College Of Medicine
1995
What Public CMS Data Show
Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
93 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $36,284 in 2024
The total amount Medicare approved for these services in 2024. 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 โ by Provider and Service, 2024.
Paid by Medicare
About $28,774 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, 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 โ by Provider and Service, 2024.
30-day fills
43 standardized 30-day fills in 2023
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
$194 in 2023
The total cost of these prescriptions in 2023, 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 โ by Provider and Drug, 2023.
Open Payments general payments, program year 2025
All general payments: $67.65 across 4 records.
By nature of payment
- Food and Beverage: $67.65 across 4 records.
Reporting-company totals
- Organon LLC: $39.96 across 3 records.
- Janssen Pharmaceuticals, Inc: $27.69 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
31 years (graduated 1995)
CMS Doctors and Clinicians data list 1995 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
2006
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, โDoes your provider accept Medicare as full payment?โ
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Mason 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 Dr. Mason 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 Springfield and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Close to the middle for clinicians listed under Surgery in Springfield, MA (2024, 28 clinicians with data). Median for this group: 157. Middle half: 90 to 263.
Fewer Medicare Part B services than 65% of clinicians listed under Surgery in Massachusetts (2024, 438 clinicians with data). Median for this group: 221. Middle half: 112 to 421.
Medicare-allowed amount
A higher Medicare-allowed amount than 70% of clinicians listed under Surgery in Springfield, MA (2024, 28 clinicians with data). Median for this group: $22,344. Middle half: $12,250 to $37,341.
Close to the middle for clinicians listed under Surgery in Massachusetts (2024, 438 clinicians with data). Median for this group: $32,226. Middle half: $14,398 to $58,427.
Paid by Medicare
A higher Medicare payment amount than 70% of clinicians listed under Surgery in Springfield, MA (2024, 28 clinicians with data). Median for this group: $16,116. Middle half: $8,634 to $28,830.
Close to the middle for clinicians listed under Surgery in Massachusetts (2024, 438 clinicians with data). Median for this group: $24,707. Middle half: $10,899 to $44,507.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Mason are from 2023.
50 active clinicians are listed under Surgery with a practice address in Springfield, MA (1,003 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Springfield
20% of these 50 clinicians have the CMS telehealth indicator.
54% of these 50 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.
-
Medicare Part B services
Medicare Part B services increased 124% from 67 in 2020 to 150 in 2024.
- 2020: 67
- 2021: 157
- 2022: 194
- 2023: 196
- 2024: 150
-
Medicare-allowed amount
Medicare-allowed amount increased 98% from $18,348 in 2020 to $36,284 in 2024.
- 2020: $18,348
- 2021: $31,654
- 2022: $43,383
- 2023: $49,218
- 2024: $36,284
-
Paid by Medicare
Paid by Medicare increased 97% from $14,628 in 2020 to $28,774 in 2024.
- 2020: $14,628
- 2021: $24,859
- 2022: $34,375
- 2023: $38,222
- 2024: $28,774
-
Medicare Part D prescriptions
Medicare Part D prescriptions went from 11 in 2018 to 41 in 2023.
- 2018: 11
- 2020: 17
- 2021: 28
- 2022: 23
- 2023: 41
-
30-day fills
30-day fills went from 11 in 2018 to 43 in 2023.
- 2018: 11
- 2020: 17
- 2021: 28
- 2022: 23
- 2023: 43
-
Part D drug cost
Part D drug cost went from $49 in 2018 to $194 in 2023.
- 2018: $49
- 2020: $26
- 2021: $75
- 2022: $45
- 2023: $194
-
Industry payments (Open Payments)
Industry payments (Open Payments) went from $223.76 in 2021 to $67.65 in 2025.
- 2021: $223.76
- 2022: $97.38
- 2023: $22.12
- 2024: $75.89
- 2025: $67.65
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2023), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท 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 โ December 31, 2025): fewer than 11 records totaling $67.65.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
TREMFYA | General | $27.69 |
| Organon LLC |
Food and Beverage
In-kind items and services
|
VTAMA | General | $21.47 |
| Organon LLC |
Food and Beverage
In-kind items and services
|
VTAMA | General | $13.35 |
| Organon LLC |
Food and Beverage
In-kind items and services
|
VTAMA | General | $5.14 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 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 โ by Provider and Service data, 2017โ2024; 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 |
|---|---|---|---|---|
|
19301
Partial removal of breast
|
32 | 29 | $1716.47 | $664.76 |
|
99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
|
32 | 30 | $188.75 | $66.25 |
|
99205
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more
|
28 | 28 | $512.36 | $179.15 |
|
38900
Imaging of lymph nodes during surgery
|
22 | 22 | $332.64 | $133.02 |
|
38525
Biopsy or removal of deep lymph nodes of underarm
|
20 | 20 | $917.50 | $219.46 |
|
99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
|
16 | 15 | $115.19 | $34.96 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2023.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 30 | 41 | $44.82 | 27 |
| Anastrozole | Anastrozole | 11 | 366 | $148.71 | โ |
Source: CMS Part D by Provider and Drug, 2023; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
NUCC Taxonomy Code: 2086X0206X
A surgical oncologist is a well-qualified surgeon who has obtained additional training and experience in the multidisciplinary approach to the prevention, diagnosis, treatment, and rehabilitation of cancer patients, and devotes a major portion of his or her professional practice to these activities and cancer research.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - SURGICAL ONCOLOGY
I20040913000176
MA
5294702007
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
Baystate Medical Practices Inc
759 Chestnut St, Springfield, MA 011991001
Phone: 4137945439
Baystate Medical Practices Inc
3300 Main St, Springfield, MA 011071112
Phone: 4137947045
Baystate Medical Practices Inc
3300 Main St, Springfield, MA 011071112
Phone: 4137947330
Baystate Medical Practices Inc
100 Wason Ave, Springfield, MA 011071381
Phone: 4137886139
Baystate Medical Practices Inc
3350 Main St, Springfield, MA 011071112
Phone: 4137949338
Baystate Medical Practices Inc
280 Chestnut St, Springfield, MA 011991001
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Surgery - Surgical Oncology
Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)
Surgery
Doctor of Medicine (M.D.)
Surgery - Surgical Oncology
Doctor of Medicine (M.D.)
Surgery - Surgical Oncology
Doctor of Osteopathic Medicine (D.O.)
Physician Assistant - Surgical
Physician Assistant
Nurse Practitioner - Family
Nurse Practitioner
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
NPI status registered as active in NPPES database
Registered at 100 WASON AVENUE, SPRINGFIELD, MA 011071179 (Tel: 4137945265)
Registered at 280 CHESTNUT ST, 2ND FLOOR, SPRINGFIELD, MA 011991001 (Tel: 4137945700)
Recorded as HOLLY MASON, M.D.
Surgery (license number reported to NPPES: MA 213644)
NPI status registered as active in NPPES database
Registered at 3350 MAIN ST, SPRINGFIELD, MA 011071112 (Tel: 4137945265)
Registered at 280 CHESTNUT ST, 2ND FLOOR, SPRINGFIELD, MA 011991001 (Tel: 4137945700)
Recorded as HOLLY MASON, M.D.
Surgery (license number reported to NPPES: MA 213644)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Surgery Specialists in Springfield
- Dr. Daniel Fish, MD
- Dr. Mazen Al-Mansour, MBBS
- Margaret Siu
- Parth Sharma
- Ronald Gross
- Dr. Matthew Deluzio, DO
More public profiles in Massachusetts
Directory navigation, in NPI number order.
- Ethel Baylor, DPM Podiatrist ยท Falmouth
- Leslie Schwab, MD Internal Medicine ยท Concord
- Eliot Nottleson, PA Physician Assistant ยท Winchendon
- Caroline Kim, MD Dermatology ยท Boston
- Jerome Friedman, MSW Social Worker - Clinical ยท Cotuit
- Hilary Goldberg, MD Internal Medicine - Pulmonary Disease ยท Boston
- Thomas Mclaughlin, PA Physician Assistant ยท Brockton
- Lynn Weigel, MP Internal Medicine - Pulmonary Disease ยท Concord
- Monika Davies, CRNA Nurse Anesthetist, Certified Registered ยท Shrewsbury
- Alice Berke, LICSW Social Worker - Clinical ยท West Stockbridge
- Scott Duany, PA Physician Assistant ยท Worcester
- Steven Smith, MD Dermatology - MOHS-Micrographic Surgery ยท Wellesley
Mailing Address
280 Chestnut St, 2nd Floor
Springfield, MA 011991001
Phone: 4137945700