Dr. Mark S. Kassis , MD
Internal Medicine โข Springfield, MA
3400 Main St
Springfield, MA 011071113
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 May 3, 2006; this date does not establish years in practice.
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Published CMS data list 86 Original Medicare Part B services in 2020.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020. Published rows only; this is not a quality measure.
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Published Part B service records, 2020:
- 99213 โ Established patient outpatient office visit: 46 service units.
- 99214 โ Established patient outpatient office visit: 29 service units.
- 99202 โ New patient outpatient office visit: 11 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020. Units differ by code; these are not visits or a measure of quality.
CPTยฎ 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 ยท Guide: How to read Medicare Part B data
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Published CMS data list 82 Medicare Part D prescriptions, including refills, in 2020.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2020. Published rows only; this is not a quality measure.
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Published Part D records, 2020:
- Prednisone โ 19 prescription fills, including refills.
- Azithromycin โ 19 prescription fills, including refills.
- Doxycycline Hyclate โ 18 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2020. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 5 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Medicare Part B services went from 400 in 2017 to 86 in 2020.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2017โ2020.
Practice Location & Contact Primary Location
3400 Main St
Springfield, MA 011071113
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $7,681 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 โ by Provider and Service, 2020.
Paid by Medicare
About $4,305 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 โ by Provider and Service, 2020.
30-day fills
82 standardized 30-day fills in 2020
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
$1,014 in 2020
The total cost of these prescriptions in 2020, 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, 2020.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019โ2025.
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.
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, โDoes your provider accept Medicare as full payment?โ
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.
Compared with the same specialty in Springfield and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Kassis are from 2020.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Kassis are from 2020.
283 active clinicians are listed under Internal Medicine with a practice address in Springfield, MA (6,830 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Springfield
17% of these 283 clinicians have the CMS telehealth indicator.
69.6% of these 283 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
Medicare Part B services decreased 79% from 400 in 2017 to 86 in 2020.
- 2017: 400
- 2018: 384
- 2019: 249
- 2020: 86
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Medicare-allowed amount
Medicare-allowed amount decreased 76% from $32,010 in 2017 to $7,681 in 2020.
- 2017: $32,010
- 2018: $25,609
- 2019: $18,692
- 2020: $7,681
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Paid by Medicare
Paid by Medicare decreased 81% from $22,315 in 2017 to $4,305 in 2020.
- 2017: $22,315
- 2018: $15,248
- 2019: $12,482
- 2020: $4,305
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 91% from 885 in 2016 to 82 in 2020.
- 2016: 885
- 2017: 409
- 2018: 467
- 2019: 296
- 2020: 82
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30-day fills
30-day fills decreased 93% from 1,116 in 2016 to 82 in 2020.
- 2016: 1,116
- 2017: 411
- 2018: 468
- 2019: 296
- 2020: 82
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Part D drug cost
Part D drug cost decreased 93% from $15,409 in 2016 to $1,014 in 2020.
- 2016: $15,409
- 2017: $5,869
- 2018: $6,731
- 2019: $4,186
- 2020: $1,014
Sources: CMS Medicare Physician & Other Practitioners (2020), CMS Medicare Part D Prescribers (2020), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2019 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, 2017โ2020; 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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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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46 | 44 | $164.39 | $78.42 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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29 | 29 | $242.28 | $110.94 |
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99202
New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more
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11 | 11 | $169.55 | $77.83 |
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.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2020.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Prednisone | Prednisone | 19 | 149 | $74.42 | 19 |
| Azithromycin | Azithromycin | 19 | 94 | $190.92 | 18 |
| Doxycycline Hyclate | Doxycycline Hyclate | 18 | 159 | $328.48 | 18 |
| Sulindac | Sulindac | 15 | 450 | $279.28 | 12 |
| Tizanidine Hcl | Tizanidine Hcl | 11 | 238 | $140.76 | โ |
Source: CMS Part D by Provider and Drug, 2020; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
NUCC Taxonomy Code: 208000000X
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant - Medical
Physician Assistant (Certified)
Nurse Practitioner - Family
Advanced Registered Nurse Practitioner
Nurse Practitioner - Family
Nurse Practitioner
Physician Assistant - Medical
Physician Assistant (Certified)
Nurse Practitioner - Family
Nurse Practitioner
Family Medicine
Doctor of Medicine (M.D.)
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 3400 MAIN ST, SPRINGFIELD, MA 011071113 (Tel: 4137949560)
Registered at 280 CHESTNUT ST, 2ND FL, SPRINGFIELD, MA 011991001 (Tel: 4137945700)
Recorded as MARK KASSIS, M.D.
Internal Medicine (license number reported to NPPES: MA 72426)
NPI status registered as active in NPPES database
Registered at 3400 MAIN ST, SPRINGFIELD, MA 011071113 (Tel: 4137949560)
Registered at 280 CHESTNUT ST, 2ND FL, SPRINGFIELD, MA 011991001 (Tel: 4137945700)
Recorded as MARK KASSIS, M.D.
Internal Medicine (license number reported to NPPES: MA 72426)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Springfield
- Dr. Sandeep Pandey, MD
- Dr. Stephen Ryzewicz, MD
- Dr. Jeffrey Scavron, MD
- Dr. Sudeep Aulakh, MD
- Dr. Biljana Simikic, DO
- Dr. Jamie Schwarz, DO
Mailing Address
280 Chestnut St, 2nd Fl
Springfield, MA 011991001
Phone: 4137945700