Dr. Seth G. Kates , MD
Dermatology • Worcester, MA
100 Martin Luther King Jr. Blvd.
Worcester, MA 016081209
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 November 2, 2005; this date does not establish years in practice.
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Published CMS data list 13,864 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 17003 — Destruction of precancer skin growth, 2-14 growths: 4,976 service units.
- 99213 — Established patient outpatient office visit: 1,997 service units.
- 17000 — Destruction of precancer skin growth, 1 growth: 1,060 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® 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 37 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 1,044 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:
- Triamcinolone Acetonide — 262 prescription fills, including refills.
- Cephalexin — 174 prescription fills, including refills.
- Fluorouracil — 84 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 19 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 95% of clinicians listed under Dermatology in Worcester, MA (2024, 26 clinicians with data). Median for this group: 1,070. Middle half: 782 to 1,754.
More Medicare Part B services than 95% of clinicians listed under Dermatology in Massachusetts (2024, 412 clinicians with data). Median for this group: 1,804. Middle half: 853 to 3,570.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 19,249 in 2020 to 13,864 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
100 Martin Luther King Jr. Blvd.
Worcester, MA 016081209
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 2 distinct group names: Chelmsford Dermatology Pc; Worcester Dermatology Associates, P.C.. 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
Perelman School Of Med At The University Of Pennsylvania
1988
What Public CMS Data Show
Dermatology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
2,602 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 – by Provider, 2024.
Medicare-allowed amount
About $1,343,003 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 – by Provider and Service, 2024.
Paid by Medicare
About $1,001,782 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 – by Provider and Service, 2024.
30-day fills
1,109 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
$90,278 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.
Open Payments general payments, program year 2025
All general payments: $4,227.01 across 196 records.
By nature of payment
- Food and Beverage: $4,227.01 across 196 records.
Reporting-company totals (3 largest of 20)
- ABBVIE INC.: $952.11 across 47 records.
- Amgen Inc.: $384.77 across 13 records.
- Sanofi and Genzyme US Companies: $347.70 across 10 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
38 years (graduated 1988)
CMS Doctors and Clinicians data list 1988 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
2005
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)
Dr. Kates 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. Kates 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 Worcester and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 95% of clinicians listed under Dermatology in Worcester, MA (2024, 26 clinicians with data). Median for this group: 1,070. Middle half: 782 to 1,754.
More Medicare Part B services than 95% of clinicians listed under Dermatology in Massachusetts (2024, 412 clinicians with data). Median for this group: 1,804. Middle half: 853 to 3,570.
Medicare-allowed amount
A higher Medicare-allowed amount than 95% of clinicians listed under Dermatology in Worcester, MA (2024, 26 clinicians with data). Median for this group: $76,395. Middle half: $35,688 to $156,768.
A higher Medicare-allowed amount than 95% of clinicians listed under Dermatology in Massachusetts (2024, 412 clinicians with data). Median for this group: $123,974. Middle half: $61,150 to $257,057.
Paid by Medicare
A higher Medicare payment amount than 95% of clinicians listed under Dermatology in Worcester, MA (2024, 26 clinicians with data). Median for this group: $55,623. Middle half: $25,935 to $118,154.
A higher Medicare payment amount than 95% of clinicians listed under Dermatology in Massachusetts (2024, 412 clinicians with data). Median for this group: $86,263. Middle half: $42,834 to $181,359.
Medicare Part D prescriptions
More Part D prescriptions than 90% of clinicians listed under Dermatology in Worcester, MA (2024, 28 clinicians with data). Median for this group: 191. Middle half: 78 to 640.
More Part D prescriptions than 80% of clinicians listed under Dermatology in Massachusetts (2024, 458 clinicians with data). Median for this group: 433. Middle half: 155 to 825.
Part D drug cost
Close to the middle for clinicians listed under Dermatology in Worcester, MA (2024, 28 clinicians with data). Median for this group: $84,535. Middle half: $2,257 to $397,041.
Close to the middle for clinicians listed under Dermatology in Massachusetts (2024, 458 clinicians with data). Median for this group: $90,594. Middle half: $5,876 to $363,288.
35 active clinicians are listed under Dermatology with a practice address in Worcester, MA (627 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Worcester
5.7% of these 35 clinicians have the CMS telehealth indicator.
77.1% of these 35 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 28% from 19,249 in 2020 to 13,864 in 2024.
- 2020: 19,249
- 2021: 15,104
- 2022: 11,225
- 2023: 12,123
- 2024: 13,864
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Medicare-allowed amount
Medicare-allowed amount increased 23% from $1,095,691 in 2020 to $1,343,003 in 2024.
- 2020: $1,095,691
- 2021: $1,017,237
- 2022: $933,097
- 2023: $927,477
- 2024: $1,343,003
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Paid by Medicare
Paid by Medicare increased 26% from $792,212 in 2020 to $1,001,782 in 2024.
- 2020: $792,212
- 2021: $752,207
- 2022: $677,645
- 2023: $667,923
- 2024: $1,001,782
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 25% from 837 in 2020 to 1,044 in 2024.
- 2020: 837
- 2021: 901
- 2022: 799
- 2023: 941
- 2024: 1,044
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30-day fills
30-day fills increased 30% from 853 in 2020 to 1,109 in 2024.
- 2020: 853
- 2021: 927
- 2022: 827
- 2023: 978
- 2024: 1,109
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Part D drug cost
Part D drug cost increased 221% from $28,137 in 2020 to $90,278 in 2024.
- 2020: $28,137
- 2021: $31,750
- 2022: $30,633
- 2023: $26,323
- 2024: $90,278
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Industry payments (Open Payments)
Industry payments (Open Payments) decreased 50% from $8,434.52 in 2021 to $4,227.01 in 2025.
- 2021: $8,434.52
- 2022: $18,852.76
- 2023: $14,962.22
- 2024: $4,155.44
- 2025: $4,227.01
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), 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): 196 records totaling $4,227.01.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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— | General | $88.03 |
| UCB, Inc. |
Food and Beverage
In-kind items and services
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Bimzelx | General | $46.10 |
| Bristol Myers Squibb Company |
Food and Beverage
Cash or cash equivalent
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Sotyktu | General | $44.78 |
| UCB, Inc. |
Food and Beverage
In-kind items and services
|
Bimzelx | General | $43.78 |
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
|
DUPIXENT | General | $42.13 |
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
|
DUPIXENT | General | $42.04 |
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
|
AYVAKIT | General | $37.43 |
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
|
DUPIXENT | General | $37.29 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
Otezla | General | $34.90 |
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
|
DUPIXENT | General | $34.85 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
Otezla | General | $34.30 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
DUPIXENT | General | $34.25 |
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
|
DUPIXENT | General | $34.09 |
| Janssen Pharmaceuticals, Inc |
Food and Beverage
In-kind items and services
|
TREMFYA | General | $34.00 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
OTEZLA | General | $33.95 |
| UCB, Inc. |
Food and Beverage
In-kind items and services
|
Bimzelx | General | $33.88 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
Otezla | General | $33.87 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
OTEZLA | General | $33.73 |
| UCB, Inc. |
Food and Beverage
In-kind items and services
|
Bimzelx | General | $33.72 |
| SUN PHARMACEUTICAL INDUSTRIES INC. |
Food and Beverage
In-kind items and services
|
ILUMYA | General | $33.55 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
OTEZLA | General | $33.00 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
|
OTEZLA | General | $32.82 |
| UCB, Inc. |
Food and Beverage
In-kind items and services
|
Bimzelx | General | $32.43 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
RINVOQ | General | $32.37 |
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
|
DUPIXENT | General | $32.30 |
(top 25 shown)
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 2016–2023 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, 2017–2024; 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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17003
Destruction of precancer skin growth, 2-14 growths
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4,976 | 746 | $30.00 | $7.49 |
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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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1,997 | 1,514 | $175.00 | $99.50 |
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17000
Destruction of precancer skin growth, 1 growth
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1,060 | 909 | $200.00 | $71.85 |
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G6001
Ultrasonic guidance for placement of radiation therapy fields
|
846 | 43 | $315.00 | $214.51 |
|
77280
Obtaining data needed to develop the optimal radiation treatment, 1 treatment area
|
803 | 41 | $470.00 | $321.89 |
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77401
Superficial and/or low voltage radiation treatment delivery
|
783 | 38 | $73.00 | $50.33 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
|
659 | 589 | $100.00 | $61.90 |
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11102
Biopsy of related skin growth, first growth
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523 | 464 | $300.00 | $110.26 |
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17110
Destruction of skin growth, 1-14 growths
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498 | 441 | $275.00 | $127.54 |
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12032
Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm
|
226 | 207 | $750.00 | $326.06 |
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17004
Destruction of precancer skin growth, 15 or more growths
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181 | 136 | $425.00 | $185.37 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
|
146 | 146 | $225.00 | $121.52 |
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11603
Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm
|
101 | 92 | $750.00 | $155.96 |
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99202
New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more
|
96 | 96 | $150.00 | $79.05 |
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11103
Biopsy of related skin growth, each additional growth
|
90 | 72 | $200.00 | $56.09 |
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11602
Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm
|
88 | 81 | $650.00 | $134.37 |
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11642
Removal of cancer skin growth of face, ears, eyelids, nose, lips, or mouth, 1.1-2.0 cm
|
86 | 82 | $800.00 | $149.01 |
|
13132
Complicated repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet, 2.6-7.5 cm
|
67 | 66 | $1300.00 | $523.74 |
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11643
Removal of cancer skin growth of face, ears, eyelids, nose, lips, or mouth, 2.1-3.0 cm
|
58 | 54 | $900.00 | $174.81 |
|
14060
Repair of wound of eyelids, nose, ears, or lips by transferring skin, 10.0 sq cm or less
|
55 | 53 | $2400.00 | $835.97 |
|
77300
Calculation of radiation therapy dose
|
50 | 41 | $115.00 | $76.23 |
|
12042
Intermediate repair of wound of neck, hands, feet, or genitals, 2.6-7.5 cm
|
49 | 47 | $800.00 | $327.31 |
|
12052
Intermediate repair of wound of face, ears, eyelids, nose, lips, or mouth, 2.6-5.0 cm
|
40 | 38 | $900.00 | $349.35 |
|
77261
Simple radiation therapy planning
|
40 | 38 | $123.00 | $77.51 |
|
77334
Design and construction of complex radiation treatment device
|
40 | 29 | $220.00 | $145.47 |
(top 25 shown)
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 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Triamcinolone Acetonide | Triamcinolone Acetonide | 262 | 6,562 | $2,087.30 | 167 |
| Cephalexin | Cephalexin | 174 | 2,062 | $2,014.38 | 154 |
| Fluorouracil | Fluorouracil | 84 | 2,585 | $4,327.69 | 80 |
| Betamethasone Dipropionate | Betamethasone Dipropionate | 70 | 1,604 | $1,871.00 | 45 |
| Clindamycin Phosphate | Clindamycin Phosphate | 44 | 1,740 | $1,119.19 | 16 |
| Nystatin | Nystatin | 40 | 962 | $948.29 | 12 |
| Ketoconazole | Ketoconazole | 40 | 1,010 | $552.89 | 29 |
| Metronidazole | Metronidazole | 39 | 1,725 | $2,153.03 | 22 |
| Clobetasol Propionate | Clobetasol Propionate | 38 | 1,078 | $2,041.64 | 20 |
| Hydrocortisone | Hydrocortisone | 37 | 852 | $145.40 | 29 |
| Valacyclovir | Valacyclovir Hcl | 35 | 343 | $336.37 | 19 |
| Imiquimod | Imiquimod | 30 | 1,034 | $803.96 | 24 |
| Minocycline Hcl | Minocycline Hcl | 28 | 790 | $543.80 | 14 |
| Azithromycin | Azithromycin | 24 | 129 | $113.44 | 24 |
| Azelaic Acid | Azelaic Acid | 22 | 850 | $1,797.45 | 13 |
| Doxycycline Hyclate | Doxycycline Hyclate | 21 | 621 | $357.89 | — |
| Fluocinonide | Fluocinonide | 21 | 585 | $563.69 | 13 |
| Dupixent Pen | Dupilumab | 19 | 520 | $67,989.67 | — |
| Ciclopirox | Ciclopirox Olamine | 16 | 540 | $511.22 | — |
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
NUCC Taxonomy Code: 207N00000X
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - DERMATOLOGY
I20050119000412
MA
0840249611
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
Chelmsford Dermatology Pc
3 Village Sq, Chelmsford, MA 018242712
Phone: 9782564151
Worcester Dermatology Associates, P.c.
100 Mlk Jr Blvd, Worcester, MA 016081209
Phone: 5087543823
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
Physician Assistant
Physician Assistant
Physician Assistant
Nurse Practitioner - Family
Nurse Practitioner
Specialist
Physician Assistant
Nurse Practitioner
Nurse Practitioner
Career & Practice History
NPI enumerated November 02, 2005.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Dermatology Specialists in Worcester
- Dr. Riley Mclean-Mandell, MD
- Dr. Shauna Rice, MD
- Dr. Laura Houk, MD
- Dr. Ryan Svoboda, MD
- Dr. Dori Goldberg, MD
- Dr. Tracey Otto, MD
Mailing Address
100 Martin Luther King Jr. Blvd.
Worcester, MA 016081209
Phone: 5087543823