Dr. Erin Thomas , MD
Internal Medicine โข Worcester, MA
55 Lake Ave N
Worcester, MA 016550002
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 April 9, 2019; this date does not establish years in practice.
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Published CMS data list 97 Original Medicare Part B services in 2023.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023. Published rows only; this is not a quality measure.
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Published Part B service records, 2023:
- 99232 โ Subsequent hospital care with moderate levelof medical decision making: 49 service units.
- 99223 โ Initial hospital care with moderate level of medical decision making: 48 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2022 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2023). CPT notice
See the full table ยท Guide: How to read Medicare Part B data
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Published CMS data list 138 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Prochlorperazine Maleate โ 21 prescription fills, including refills.
- Enoxaparin Sodium โ 18 prescription fills, including refills.
- Dexamethasone โ 16 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 9 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 60% of clinicians listed under Internal Medicine in Worcester, MA (2024, 205 clinicians with data). Median for this group: 319. Middle half: 61 to 3,185.
Fewer Part D prescriptions than 70% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,672 clinicians with data). Median for this group: 1,174. Middle half: 129 to 3,740.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 63 in 2022 to 97 in 2023.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022โ2023.
Practice Location & Contact Primary Location
55 Lake Ave N
Worcester, MA 016550002
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 Boston, MA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $12,970 in 2023
The total amount Medicare approved for these services in 2023. 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, 2023.
Paid by Medicare
About $10,176 in 2023
The part of the Medicare-allowed amount that Medicare itself paid in 2023, 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, 2023.
30-day fills
146 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
$645,697 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 โ by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019โ2025.
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.
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.
Enrolled in Medicare (PECOS)
Dr. Thomas 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. Thomas 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 D prescriptions
Fewer Part D prescriptions than 60% of clinicians listed under Internal Medicine in Worcester, MA (2024, 205 clinicians with data). Median for this group: 319. Middle half: 61 to 3,185.
Fewer Part D prescriptions than 70% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,672 clinicians with data). Median for this group: 1,174. Middle half: 129 to 3,740.
Part D drug cost
A higher Part D drug cost than 90% of clinicians listed under Internal Medicine in Worcester, MA (2024, 205 clinicians with data). Median for this group: $40,855. Middle half: $1,827 to $224,930.
A higher Part D drug cost than 90% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,672 clinicians with data). Median for this group: $103,819. Middle half: $9,088 to $319,703.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Dr. Thomas are from 2023.
448 active clinicians are listed under Internal Medicine with a practice address in Worcester, MA (6,830 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Worcester
16.3% of these 448 clinicians have the CMS telehealth indicator.
57.6% of these 448 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 increased 54% from 63 in 2022 to 97 in 2023.
- 2022: 63
- 2023: 97
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Medicare-allowed amount
Medicare-allowed amount increased 105% from $6,342 in 2022 to $12,970 in 2023.
- 2022: $6,342
- 2023: $12,970
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Paid by Medicare
Paid by Medicare increased 101% from $5,053 in 2022 to $10,176 in 2023.
- 2022: $5,053
- 2023: $10,176
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 12 in 2020 to 138 in 2024.
- 2020: 12
- 2021: 53
- 2022: 45
- 2024: 138
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30-day fills
30-day fills increased 508% from 24 in 2020 to 146 in 2024.
- 2020: 24
- 2021: 85
- 2022: 48
- 2024: 146
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Part D drug cost
Part D drug cost went from $91 in 2020 to $645,697 in 2024.
- 2020: $91
- 2021: $605
- 2022: $12,117
- 2024: $645,697
Sources: CMS Medicare Physician & Other Practitioners (2023), CMS Medicare Part D Prescribers (2024), 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 2021โ2022 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, 2022โ2023; 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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99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
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49 | 19 | $290.00 | $84.08 |
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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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48 | 48 | $805.00 | $184.37 |
Source: CMS Part B by Provider and Service, 2023; 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 |
|---|---|---|---|---|---|
| Prochlorperazine Maleate | Prochlorperazine Maleate | 21 | 402 | $535.06 | 14 |
| Enoxaparin Sodium | Enoxaparin Sodium | 18 | 521 | $6,388.32 | โ |
| Dexamethasone | Dexamethasone | 16 | 269 | $73.38 | โ |
| Revlimid | Lenalidomide | 16 | 368 | $207,837.54 | โ |
| Acyclovir | Acyclovir | 15 | 570 | $126.60 | โ |
| Eliquis | Apixaban | 14 | 485 | $9,557.14 | โ |
| Calquence | Acalabrutinib Maleate | 14 | 420 | $209,189.04 | โ |
| Bosulif | Bosutinib | 13 | 381 | $211,891.45 | โ |
| Ondansetron Hcl | Ondansetron Hcl | 11 | 230 | $98.24 | โ |
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
Self-certified to NPPES: 2023-08-20NUCC 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: 390200000X
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20220804003000
MA
7012243272
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
55 Fruit St # 1500
Boston, MA 021142621
Phone: 6177243874
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Radiology - Diagnostic Radiology
Dermatology
Medical Genetics - Clinical Genetics (M.D.)
Doctor of Medicine (M.D.)
Nurse Practitioner
Nurse Practitioner
Internal Medicine
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 55 LAKE AVE N, WORCESTER, MA 016550002 (Tel: 5088561886)
Registered at 55 FRUIT ST # 1500, BOSTON, MA 021142621 (Tel: 6177243874)
Registered at 55 FRUIT ST # 1500, BOSTON, MA 021142621 (Tel: 6177243874)
Recorded as ERIN THOMAS, MD
NPI status registered as active in NPPES database
Registered at 55 LAKE AVE N, WORCESTER, MA 016550002 (Tel: 5088561886)
Registered at 55 LAKE AVE N, WORCESTER, MA 016550002
Recorded as ERIN THOMAS
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Worcester
- Dr. Olugbenga Salako, MBCHB
- Dr. Lisa Bocelli, DO
- Dr. Kimiyoshi Kobayashi, MD
- Dr. Charu Bajracharya, MD
- Dr. Adam Doerr, MD
- Dr. Milind Bhagat, MD
Mailing Address
55 Fruit St # 1500
Boston, MA 021142621
Phone: 6177243874