Dr. Thomas B Williamson , MD
Internal Medicine • Huron, OH
300 Williams St
Huron, OH 448391648
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
-
Dr. Thomas Williamson is listed in NPPES under Internal Medicine.
-
NPI assigned on June 5, 2006; this date does not establish years in practice.
-
Published CMS data list 1,671 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.
-
Published Part B service records, 2024:
- 99213 — Established patient outpatient office visit: 320 service units.
- 99214 — Established patient outpatient office visit: 307 service units.
- 85610 — Blood test, clotting time: 293 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 12 records in the table · Guide: How to read Medicare Part B data
-
Published CMS data list 6,386 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.
-
Published Part D records, 2024:
- Atorvastatin Calcium — 298 prescription fills, including refills.
- Amlodipine Besylate — 294 prescription fills, including refills.
- Levothyroxine Sodium — 291 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 106 records in the table · Guide: How to read Medicare Part D prescriber data
-
More Medicare Part B services than 85% of clinicians listed under Internal Medicine in Ohio (2024, 3,145 clinicians with data). Median for this group: 574. Middle half: 262 to 1,043.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
-
Medicare Part B services went from 3,263 in 2020 to 1,671 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
300 Williams St
Huron, OH 448391648
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: North Coast Professional Company, Llc. 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 Rochester School Of Medicine And Dentistry
1977
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
373 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 $68,301 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 $46,418 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
14,814 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
$483,734 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: $104.28 across 2 records.
By nature of payment
- Food and Beverage: $104.28 across 2 records.
Reporting-company totals
- Bard Peripheral Vascular, Inc.: $89.27 across 1 record.
- ABBVIE INC.: $15.01 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
49 years (graduated 1977)
CMS Doctors and Clinicians data list 1977 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, “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. Williamson 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. Williamson 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 Huron and Ohio
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 85% of clinicians listed under Internal Medicine in Ohio (2024, 3,145 clinicians with data). Median for this group: 574. Middle half: 262 to 1,043.
Too few clinicians listed under Internal Medicine in Huron have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 65% of clinicians listed under Internal Medicine in Ohio (2024, 3,145 clinicians with data). Median for this group: $50,782. Middle half: $23,884 to $83,638.
Too few clinicians listed under Internal Medicine in Huron have Medicare Part B data for 2024 to compare.
Paid by Medicare
Close to the middle for clinicians listed under Internal Medicine in Ohio (2024, 3,145 clinicians with data). Median for this group: $37,953. Middle half: $17,413 to $63,670.
Too few clinicians listed under Internal Medicine in Huron have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 75% of clinicians listed under Internal Medicine in Ohio (2024, 3,362 clinicians with data). Median for this group: 883. Middle half: 119 to 5,445.
Too few clinicians listed under Internal Medicine in Huron have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 75% of clinicians listed under Internal Medicine in Ohio (2024, 3,362 clinicians with data). Median for this group: $79,160. Middle half: $4,027 to $440,452.
Too few clinicians listed under Internal Medicine in Huron have Medicare Part D data for 2024 to compare.
3 active clinicians are listed under Internal Medicine with a practice address in Huron, OH (5,283 in Ohio).
Addresses are self-reported to NPPES and may be out of date.
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 decreased 49% from 3,263 in 2020 to 1,671 in 2024.
- 2020: 3,263
- 2021: 3,364
- 2022: 2,602
- 2023: 2,543
- 2024: 1,671
-
Medicare-allowed amount
Medicare-allowed amount decreased 56% from $154,221 in 2020 to $68,301 in 2024.
- 2020: $154,221
- 2021: $144,654
- 2022: $88,032
- 2023: $89,424
- 2024: $68,301
-
Paid by Medicare
Paid by Medicare decreased 60% from $115,160 in 2020 to $46,418 in 2024.
- 2020: $115,160
- 2021: $109,287
- 2022: $56,410
- 2023: $59,532
- 2024: $46,418
-
Medicare Part D prescriptions
Medicare Part D prescriptions decreased 20% from 7,995 in 2020 to 6,386 in 2024.
- 2020: 7,995
- 2021: 7,609
- 2022: 7,504
- 2023: 6,739
- 2024: 6,386
-
30-day fills
30-day fills decreased 10% from 16,502 in 2020 to 14,814 in 2024.
- 2020: 16,502
- 2021: 15,715
- 2022: 15,736
- 2023: 15,267
- 2024: 14,814
-
Part D drug cost
Part D drug cost increased 40% from $346,119 in 2020 to $483,734 in 2024.
- 2020: $346,119
- 2021: $333,881
- 2022: $335,381
- 2023: $324,417
- 2024: $483,734
-
Industry payments (Open Payments)
Industry payments (Open Payments) went from $17.67 in 2022 to $104.28 in 2025.
- 2022: $17.67
- 2023: $42.57
- 2024: $13.34
- 2025: $104.28
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): fewer than 11 records totaling $104.28.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Bard Peripheral Vascular, Inc. |
Food and Beverage
In-kind items and services
|
RotarexS 6 F x 135 cm | General | $89.27 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
UBRELVY | General | $15.01 |
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 |
|---|---|---|---|---|
|
99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
|
320 | 191 | $148.16 | $65.45 |
|
99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
|
307 | 172 | $207.85 | $83.49 |
|
85610
Blood test, clotting time
|
293 | 21 | $21.89 | $4.20 |
|
93793
Anticoagulant management of patient taking warfarin
|
284 | 21 | $18.89 | $10.91 |
|
G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
|
176 | 176 | $186.70 | $46.94 |
|
83036
Hemoglobin a1c level
|
147 | 59 | $32.90 | $9.52 |
|
G0008
Administration of influenza virus vaccine
|
41 | 41 | $26.00 | $25.48 |
|
90662
Influenza vaccine split virus, preservative free
|
40 | 40 | $109.25 | $81.73 |
|
81003
Automated urinalysis test
|
18 | 18 | $15.89 | $2.20 |
|
99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
|
18 | 17 | $93.00 | $51.05 |
|
G0180
Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and
|
16 | 15 | $75.00 | $51.39 |
|
G0402
Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment
|
11 | 11 | $241.55 | $149.14 |
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 |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 298 | 24,714 | $3,337.06 | 80 |
| Amlodipine Besylate | Amlodipine Besylate | 294 | 23,882 | $1,610.00 | 77 |
| Levothyroxine Sodium | Levothyroxine Sodium | 291 | 22,325 | $2,919.04 | 71 |
| Metformin Hcl | Metformin Hcl | 267 | 21,931 | $1,728.27 | 68 |
| Omeprazole | Omeprazole | 264 | 20,592 | $3,243.42 | 64 |
| Lisinopril | Lisinopril | 254 | 19,964 | $1,386.42 | 67 |
| Hydrochlorothiazide | Hydrochlorothiazide | 243 | 20,525 | $721.56 | 66 |
| Losartan Potassium | Losartan Potassium | 238 | 20,725 | $2,617.85 | 66 |
| Simvastatin | Simvastatin | 229 | 15,653 | $1,413.03 | 51 |
| Metoprolol Succinate | Metoprolol Succinate | 176 | 13,033 | $2,730.00 | 43 |
| Zolpidem Tartrate | Zolpidem Tartrate | 153 | 4,650 | $702.96 | 23 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 143 | 11,071 | $1,703.12 | 41 |
| Metoprolol Tartrate | Metoprolol Tartrate | 127 | 8,071 | $498.73 | 28 |
| Allopurinol | Allopurinol | 122 | 8,387 | $1,447.78 | 26 |
| Jardiance | Empagliflozin | 117 | 6,194 | $115,470.30 | 22 |
| Lorazepam | Lorazepam | 115 | 3,338 | $332.49 | 30 |
| Warfarin Sodium | Warfarin Sodium | 112 | 8,251 | $1,087.84 | 24 |
| Tamsulosin Hcl | Tamsulosin Hcl | 105 | 7,490 | $1,461.31 | 32 |
| Donepezil Hcl | Donepezil Hcl | 95 | 2,983 | $726.95 | — |
| Sertraline Hcl | Sertraline Hcl | 94 | 7,022 | $591.23 | 26 |
| Gabapentin | Gabapentin | 93 | 7,087 | $1,122.94 | 24 |
| Escitalopram Oxalate | Escitalopram Oxalate | 88 | 6,453 | $849.07 | 21 |
| Alprazolam | Alprazolam | 85 | 2,485 | $259.91 | 17 |
| Memantine Hcl | Memantine Hcl | 83 | 2,023 | $1,289.06 | — |
| Furosemide | Furosemide | 81 | 4,653 | $316.96 | 20 |
(top 25 shown)
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: 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.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20100727000217
OH
8224161351
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
North Coast Professional Company, Llc
300 Williams St, Huron, OH 448391648
Phone: 4194335222
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated June 05, 2006.
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
Mailing Address
1031 Pierce Street, Suite D
Sandusky, OH 44870
Phone: 4195575541