Dr. Thomas A Yonchak , DDS MS
Dentist - Endodontics • Fairfield, OH
5180 Winton Rd
Fairfield, OH 45014
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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Dr. Thomas Yonchak is listed in NPPES under Dentist - Endodontics.
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NPI assigned on December 15, 2006; this date does not establish years in practice.
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Published CMS data list 243 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:
- Penicillin V Potassium — 84 prescription fills, including refills.
- Amoxicillin — 53 prescription fills, including refills.
- Cephalexin — 53 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 6 records in the table · Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 85% of clinicians listed under Dentist - Endodontics in Ohio (2024, 105 clinicians with data). Median for this group: 69. Middle half: 36 to 183.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 178 in 2020 to 243 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
5180 Winton Rd
Fairfield, OH 45014
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
Dentist - Endodontics: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
243 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
$698 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 2022
All general payments: $60.05 across 2 records.
By nature of payment
- Food and Beverage: $60.05 across 2 records.
Reporting-company totals
- Align Technology, Inc.: $52.63 across 1 record.
- Sonendo Inc: $7.42 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 2022 (published June 30, 2026).
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, “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.
Compared with the same specialty in Fairfield and Ohio
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 85% of clinicians listed under Dentist - Endodontics in Ohio (2024, 105 clinicians with data). Median for this group: 69. Middle half: 36 to 183.
Too few clinicians listed under Dentist - Endodontics in Fairfield 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 Dentist - Endodontics in Ohio (2024, 105 clinicians with data). Median for this group: $232. Middle half: $109 to $682.
Too few clinicians listed under Dentist - Endodontics in Fairfield have Medicare Part D data for 2024 to compare.
3 active clinicians are listed under Dentist - Endodontics with a practice address in Fairfield, OH (186 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.
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 37% from 178 in 2020 to 243 in 2024.
- 2020: 178
- 2021: 237
- 2022: 225
- 2023: 220
- 2024: 243
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30-day fills
30-day fills increased 37% from 178 in 2020 to 243 in 2024.
- 2020: 178
- 2021: 237
- 2022: 225
- 2023: 220
- 2024: 243
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Part D drug cost
Part D drug cost went from $690 in 2020 to $698 in 2024.
- 2020: $690
- 2021: $1,096
- 2022: $874
- 2023: $835
- 2024: $698
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $219.00 in 2019 to $60.05 in 2022.
- 2019: $219.00
- 2022: $60.05
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2022), 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 2022 (payments made January 1 – December 31, 2022): fewer than 11 records totaling $60.05.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Align Technology, Inc. |
Food and Beverage
Cash or cash equivalent
|
Invisalign | General | $52.63 |
| Sonendo Inc |
Food and Beverage
Cash or cash equivalent
|
GentleWave Console | General | $7.42 |
Source: CMS Open Payments, program year 2022, released June 30, 2026.
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 |
|---|---|---|---|---|---|
| Penicillin V Potassium | Penicillin V Potassium | 84 | 586 | $313.07 | 79 |
| Amoxicillin | Amoxicillin | 53 | 173 | $65.38 | 48 |
| Cephalexin | Cephalexin | 53 | 65 | $95.60 | 43 |
| Azithromycin | Azithromycin | 25 | 69 | $85.62 | 22 |
| Doxycycline Hyclate | Doxycycline Hyclate | 15 | 102 | $54.75 | 14 |
| Metronidazole | Metronidazole | 13 | 91 | $83.34 | 12 |
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: 1223E0200X
The branch of dentistry that is concerned with the morphology, physiology and pathology of the human dental pulp and periradicular tissues. Its study and practice encompass the basic and clinical sciences including biology of the normal pulp, the etiology, diagnosis, prevention and treatment of diseases and injuries of the pulp and associated periradicular conditions.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Dentist - Endodontics
DDSMS
Career & Practice History
NPI enumerated December 15, 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
5180 Winton Rd
Fairfield, OH 45014
Phone: 5138291935