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Home > MA Providers > Surgical Oncologists

Dr. Holly S. Mason, MD

Accepting New Patients

(79 Ratings)

Specializes in: Surgical Oncology (Cancer Surgery)

University of Vermont College of Medicine (1995)

Professional interests include: breast surgery

100 WASON AVENUE
SPRINGFIELD, MA 01107

(413) 794-8899

Dr. Holly S. Mason, MD is a surgical oncologist in SPRINGFIELD, MA specializing in surgical oncology (cancer surgery). She graduated from University of Vermont College of Medicine in 1995 and has 31 years of experience. Dr. Holly S. Mason, MD is affiliated with Baystate Health and Baystate Surgical Oncology & Breast Specialists.

Office Locations

100 WASON AVENUE
SPRINGFIELD, MA 01107

open_in_new

115 West Silver Street
Westfield, MA 01085

(413) 794-8899

(413) 571-0158

open_in_new

In The News (see more mentions in the news)

“Dr. Holly Mason, section chief of breast surgery and surgical oncology in the department of surgery at Baystate, presents the first session, "Innovative Seed Procedure for Breast Surgery,"...”—"Baystate Health radiologist sees advances in breast cancer treatment", Mass Live, October 2024

“"It's definitely a win for patients and I do believe it's a win for the health system," said Dr. Holly Mason, surgery chief at Baystate Noble Hospital.”—"Baystate Noble Hospital rolls out new procedure for mastectomy patients", Mass Live, October 2024

“Several years ago, Baystate Health surgeon Holly S. Mason noticed a "preponderance" over several months of she called "very young women with breast cancer in their 20s and early 30s, more than we...”—"Genetic testing, better breast cancer treatments give younger women more options", Mass Live, October 2024

Noteworthy Medicare Patient Procedures Performed by Dr. Holly S. Mason, MD in 2023

Click on any procedure below to see further details on volume and pricing among Medicare patients.

Top 10%

By Affordability:

lymph node biopsy

sentinel lymph node mapping

surgical lymph node biopsy

In 2023, Dr. Holly S. Mason, MD had a list price for lymph node biopsy, sentinel lymph node mapping, and surgical lymph node biopsy that was lower than the list prices billed to Medicare by 90% of providers in related specialties within Massachusetts. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Top 25%

By Volume:

breast excision

excision

By Affordability:

deep lymph node biopsy

lymph node procedures

open lymph node biopsy

In 2012, among providers in related specialties within Massachusetts, Dr. Holly S. Mason, MD performed more breast excision, and excision procedures for Medicare patients than 75% of them and she also had a list price for deep lymph node biopsy, lymph node procedures, and open lymph node biopsy that was lower than the list prices billed to Medicare by 75% of them. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Holly S. Mason, MD treated as a surgical oncologist in SPRINGFIELD, MA during 2012 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Holly S. Mason, MD for Medicare patients.

breast procedures	34
cancer surgery	34
diagnostic procedures	24
doctor visit	111
excision	58
lymph node procedures	45
open surgery	24
plastic surgery procedures	12
reconstructive surgery	12
tissue transfer	12
wound repair (e.g. stitches)	12

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Holly S. Mason, MD treated as a surgical oncologist in SPRINGFIELD, MA during 2013 were excision, lymph node procedures, breast procedures and open surgery.

Volume of procedures performed by Dr. Holly S. Mason, MD for Medicare patients.

breast procedures	26
cancer surgery	26
diagnostic procedures	26
doctor visit	78
excision	52
lymph node procedures	51
open surgery	26

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Holly S. Mason, MD.

**Ethnicity**
Non-Hispanic White	68
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	45
From 75 to 84	20
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2013

Hypertension	71
High Cholesterol	57
Stroke	0
Ischemic Heart Disease	20
Depression	25
Chronic Kidney Disease	14
Asthma	13
Osteoperosis	0
Atrial Fibrilation	14
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	22
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Holly S. Mason, MD treated as a surgical oncologist in SPRINGFIELD, MA during 2014 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Holly S. Mason, MD for Medicare patients.

breast procedures	19
cancer surgery	19
diagnostic procedures	12
doctor visit	39
excision	31
lymph node procedures	24
open surgery	12

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Holly S. Mason, MD.

**Gender**
Male	0
Female	60

**Age**
From 65 to 74	31
From 75 to 84	15
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2014

Hypertension	72
High Cholesterol	42
Stroke	0
Ischemic Heart Disease	22
Depression	35
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	25
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Holly S. Mason, MD treated as a surgical oncologist in SPRINGFIELD, MA during 2015 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Holly S. Mason, MD for Medicare patients.

breast procedures	17
cancer surgery	17
diagnostic procedures	14
doctor visit	30
excision	31
lymph node procedures	29
open surgery	14

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Holly S. Mason, MD.

**Gender**
Male	0
Female	118

**Age**
From 65 to 74	56
From 75 to 84	32
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2015

Hypertension	66
High Cholesterol	54
Stroke	0
Ischemic Heart Disease	0
Depression	32
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	24
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Holly S. Mason, MD treated as a surgical oncologist in SPRINGFIELD, MA during 2016 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Holly S. Mason, MD for Medicare patients.

breast procedures	33
cancer surgery	33
diagnostic procedures	18
doctor visit	95
excision	51
lymph node procedures	35
open surgery	18

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Holly S. Mason, MD.

**Gender**
Male	0
Female	77

**Age**
From 65 to 74	35
From 75 to 84	20
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2016

Hypertension	60
High Cholesterol	47
Stroke	0
Ischemic Heart Disease	14
Depression	31
Chronic Kidney Disease	16
Asthma	17
Osteoperosis	14
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	19
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Holly S. Mason, MD treated as a surgical oncologist in SPRINGFIELD, MA during 2017 were excision, breast procedures, cancer surgery and lymph node procedures.

Volume of procedures performed by Dr. Holly S. Mason, MD for Medicare patients.

breast procedures	49
cancer surgery	49
diagnostic procedures	23
doctor visit	106
excision	72
lymph node procedures	44
open surgery	23

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Holly S. Mason, MD.

**Gender**
Male	0
Female	107

**Ethnicity**
Non-Hispanic White	95
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	42
From 75 to 84	32
85 and over	12
Less than 65	21

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2017

Hypertension	66
High Cholesterol	48
Stroke	0
Ischemic Heart Disease	24
Depression	30
Chronic Kidney Disease	22
Asthma	0
Osteoperosis	10
Atrial Fibrilation	10
Heart Failure	12
Chronic Obstructive Pulmonary Disease	11
Diabetes	17
Dementia	11
Cancer	75

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Holly S. Mason, MD treated as a surgical oncologist in SPRINGFIELD, MA during 2018 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Holly S. Mason, MD for Medicare patients.

breast procedures	21
cancer surgery	21
diagnostic procedures	11
doctor visit	56
excision	32
lymph node procedures	22
open surgery	11

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Holly S. Mason, MD.

**Gender**
Male	0
Female	69

**Age**
From 65 to 74	37
From 75 to 84	19
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2018

Hypertension	62
High Cholesterol	70
Stroke	0
Ischemic Heart Disease	20
Depression	28
Chronic Kidney Disease	29
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	16
Chronic Obstructive Pulmonary Disease	0
Diabetes	28
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Holly S. Mason, MD treated as a surgical oncologist in SPRINGFIELD, MA during 2020 were breast procedures, cancer surgery and excision.

Volume of procedures performed by Dr. Holly S. Mason, MD for Medicare patients.

breast procedures	18
cancer surgery	18
doctor visit	49
excision	18

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Holly S. Mason, MD.

**Gender**
Male	0
Female	51

**Age**
From 65 to 74	24
From 75 to 84	13
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2020

Hypertension	47
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	0
Depression	33
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	22
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Holly S. Mason, MD treated as a surgical oncologist in SPRINGFIELD, MA during 2021 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Holly S. Mason, MD for Medicare patients.

breast procedures	20
cancer surgery	20
diagnostic procedures	16
doctor visit	105
excision	36
lymph node procedures	32
open surgery	16

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Holly S. Mason, MD.

**Age**
From 65 to 74	53
From 75 to 84	26
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2021

Hypertension	58
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	19
Depression	29
Chronic Kidney Disease	18
Asthma	0
Osteoperosis	24
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	18
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Holly S. Mason, MD treated as a surgical oncologist in SPRINGFIELD, MA during 2022 were excision, lymph node procedures, breast procedures and cancer surgery.

Volume of procedures performed by Dr. Holly S. Mason, MD for Medicare patients.

breast procedures	34
cancer surgery	34
diagnostic procedures	17
doctor visit	125
excision	51
lymph node procedures	35
open surgery	17

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Holly S. Mason, MD.

**Ethnicity**
Non-Hispanic White	88
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	49
From 75 to 84	30
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2022

Hypertension	65
High Cholesterol	63
Stroke	0
Ischemic Heart Disease	17
Depression	28
Chronic Kidney Disease	18
Asthma	21
Osteoperosis	27
Atrial Fibrilation	0
Heart Failure	11
Chronic Obstructive Pulmonary Disease	15
Diabetes	18
Dementia	0
Cancer	75

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Holly S. Mason, MD for Medicare patients.

The highest averages for the top procedures that Dr. Holly S. Mason, MD treated as a surgical oncologist in SPRINGFIELD, MA were excision, lymph node procedures, breast procedures and cancer surgery.

breast procedures	27
cancer surgery	27
diagnostic procedures	17
doctor visit	79
excision	43
lymph node procedures	35
open surgery	17
plastic surgery procedures	12
reconstructive surgery	12
tissue transfer	12
wound repair (e.g. stitches)	12

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Holly S. Mason, MD.

**Gender**
Male	0
Female	48

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	25
Native American / Alaskan Native	0
Hispanic	0
Other	0

**Age**
75 to 84	20
85 and over	1
Less than 65	2
65 to 74	37

Average of Total of Conditions of Medicare patients treated by Dr. Holly S. Mason, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Holly S. Mason, MD treated were cancer, hypertension, high cholesterol and depression.

Hypertension	56
High Cholesterol	48
Stroke	0
Ischemic Heart Disease	13
Depression	27
Chronic Kidney Disease	11
Asthma	5
Osteoporosis	7
Heart Failure	3
Chronic Obstructive Pulmonary Disease	2
Diabetes	19
Atrial Fibrillation	2
Cancer	67
Dementia	1

Education & Training

Dr. Holly S. Mason, MD graduated from University of Vermont College of Medicine in 1995. She completed residency at University of Illinois at Chicago Affiliated Hospitals. She is certified by the American Board of Surgery and has a state license in Massachusetts.

Medical School: University of Vermont College of Medicine (1995)

Residency: University of Illinois at Chicago Affiliated Hospitals (2000)

Board Certification: American Board of Surgery

Licensed In: Massachusetts

Affiliations & Hospitals

Dr. Holly S. Mason, MD is associated with these hospitals and organizations:

Baystate Health

Baystate Surgical Oncology & Breast Specialists

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Holly S. Mason, MD appears to accept the following insurance providers: Harvard Pilgrim Health Care, Blue Cross Blue Shield HMO, United Healthcare, Tufts Health Plan, Aetna, Unicare, TRICARE, Medicare, Medicaid, Railroad Medicare, Cigna, ConnectiCare, CeltiCare, First Health, Private Healthcare Systems (PHCS), NORTHEAST DIRECT, BLUE SHIELD MEDICARE ADV, SERENITY CARE PACE, FALLON NON MASS HEALTH, BMC HEALTHNET ACO, COMMONWEALTH CARE ALLIANCE, HNE BE HEALTHY PARTNERSHIP, CONSOLIDATED, SENIOR WHOLE HEALTH, BLUE SHIELD PPO IND, HEALTH NEW ENGLAND EXCLUDING BE HEALTHY, BMC HEALTHNET MCO and FALLON ACO.

Insurance Accepted by Provider includes:

According to our sources, Dr. Holly S. Mason, MD accepts the following insurance providers:

Harvard Pilgrim Health Care

Blue Cross Blue Shield HMO

United Healthcare

Tufts Health Plan

Aetna

Unicare

TRICARE

Medicare

Medicaid

Railroad Medicare

Cigna

ConnectiCare

CeltiCare

First Health

Private Healthcare Systems (PHCS)

NORTHEAST DIRECT

BLUE SHIELD MEDICARE ADV

SERENITY CARE PACE

FALLON NON MASS HEALTH

BMC HEALTHNET ACO

COMMONWEALTH CARE ALLIANCE

HNE BE HEALTHY PARTNERSHIP

CONSOLIDATED

SENIOR WHOLE HEALTH

BLUE SHIELD PPO IND

HEALTH NEW ENGLAND EXCLUDING BE HEALTHY

BMC HEALTHNET MCO

FALLON ACO

Ratings & Reviews

Dr. Holly S. Mason, MD has an exceptional overall rating with an average of 5.0 out of 5 stars based on 79 ratings. We collect ratings and reviews of Dr. Holly S. Mason, MD from all over the web to help you find the right in SPRINGFIELD, MA.

Overall Rating

(79 Ratings)

Leave a Review

Reviews From Around The Web

Overall Rating: 5.0 2023-09-24

Patient verified via Press Ganey

I cannot find words to express my thanks to the entire team at Baystate Breast Surgery. They have been professional, kind, diligent, responsive in treating me during a very worrying situation. They are like gold.

Overall Rating: 5.0 2023-09-26

Patient verified via Press Ganey

*Dr. Holly Mason is a excellent surgeon. She made me feel comfortable during my surgery. I was in good hands. She has a wonderful team.

Overall Rating: 5.0 2024-02-02

Patient verified via Press Ganey

Very good experiences all around.

General Payments

These charts describe general payments received by Dr. Holly S. Mason, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Sun Pharmaceutical Industries Inc.	$396 ILUMYA $396
Pfizer Inc.	$203 EUCRISA $181	BENEFIX $22
HeartWare, Inc.	$66 HeartWare HVAD $66
Cianna Medical Inc	$46 SAVI/SAVI SCOUT $46
Kyowa Kirin, Inc.	$22 POTELIGEO $22
Other	$54 STELARA $22	COSENTYX $16	SEYSARA $16

**Types of Payments**
Food and Beverage	$786

Biography

Dr. Holly Mason practices surgical oncology (cancer surgery) in Springfield, MA and Westfield, MA. Dr. Mason graduated from the University of Vermont College of Medicine. She trained at a hospital affiliated with the University of Illinois at Chicago for residency. She is especially interested in breast surgery. Her average rating from her patients is 5.0 stars (out of 5). She seems to honor several insurance carriers, including ConnectiCare, Blue California, and Coventry. Dr. Mason has received the following distinction: Baystate Women in Medicine and Science Impact Award. Dr. Mason is affiliated with Baystate Health. She welcomes new patients at her office inSpringfield, MA as reported by Doctor.com.

Select Year:

Dr. Holly S. Mason, MD

Office Locations

In The News (see more mentions in the news)

Noteworthy Medicare Patient Procedures Performed by Dr. Holly S. Mason, MD in 2023

By Affordability:

By Volume:

By Affordability:

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

2013 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2013

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

2014 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2014

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

2015 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2015

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

2016 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2016

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

2017 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2017

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

2018 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2018

Medicare Procedure and Patient Information

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

2020 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2020

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

2021 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2021

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

2022 Medicare Patient Data

Conditions of Medicare patients treated by Dr. Holly S. Mason, MD in 2022

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Average Medicare Patient Data From 2012 - 2022

Average of Total of Conditions of Medicare patients treated by Dr. Holly S. Mason, MD From 2012 - 2022

Education & Training

Affiliations & Hospitals

Insurance Information

Ratings & Reviews

General Payments

Biography

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