Dr. Gregory Paul Thomas , DDS MD
Oral & Maxillofacial Surgery • Chicago, IL
676 N Saint Clair St, Suite 2280
Chicago, IL 606112927
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. Gregory Thomas is listed in NPPES under Oral & Maxillofacial Surgery.
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NPI assigned on November 1, 2006; this date does not establish years in practice.
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Published CMS data list 364 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:
- Amoxicillin — 165 prescription fills, including refills.
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) — 143 prescription fills, including refills.
- Azithromycin — 28 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 5 records in the table · Guide: How to read Medicare Part D prescriber data
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More Part D prescriptions than 90% of clinicians listed under Oral & Maxillofacial Surgery in Chicago, IL (2024, 11 clinicians with data). Median for this group: 175. Middle half: 108 to 223.
More Part D prescriptions than 75% of clinicians listed under Oral & Maxillofacial Surgery in Illinois (2024, 37 clinicians with data). Median for this group: 178. Middle half: 86 to 364.
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 188 in 2020 to 364 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
676 N Saint Clair St
Suite 2280
Chicago, IL 606112927
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
Oral & Maxillofacial Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
364 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
$2,022 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 2024
All general payments: $80.53 across 3 records.
By nature of payment
- Food and Beverage: $80.53 across 3 records.
Reporting-company totals
- Geistlich Pharma, North America, Inc.: $37.51 across 1 record.
- BioHorizons Implant Systems Inc.: $24.39 across 1 record.
- Pacira Pharmaceuticals Incorporated: $18.63 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 2024 (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 Chicago and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
More Part D prescriptions than 90% of clinicians listed under Oral & Maxillofacial Surgery in Chicago, IL (2024, 11 clinicians with data). Median for this group: 175. Middle half: 108 to 223.
More Part D prescriptions than 75% of clinicians listed under Oral & Maxillofacial Surgery in Illinois (2024, 37 clinicians with data). Median for this group: 178. Middle half: 86 to 364.
Part D drug cost
A higher Part D drug cost than 90% of clinicians listed under Oral & Maxillofacial Surgery in Chicago, IL (2024, 11 clinicians with data). Median for this group: $561. Middle half: $372 to $1,278.
A higher Part D drug cost than 80% of clinicians listed under Oral & Maxillofacial Surgery in Illinois (2024, 37 clinicians with data). Median for this group: $696. Middle half: $304 to $1,546.
18 active clinicians are listed under Oral & Maxillofacial Surgery with a practice address in Chicago, IL (62 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Chicago
0% of these 18 clinicians have the CMS telehealth indicator.
38.9% of these 18 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 D prescriptions
Medicare Part D prescriptions increased 94% from 188 in 2020 to 364 in 2024.
- 2020: 188
- 2021: 254
- 2022: 403
- 2023: 260
- 2024: 364
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30-day fills
30-day fills increased 91% from 191 in 2020 to 364 in 2024.
- 2020: 191
- 2021: 254
- 2022: 403
- 2023: 260
- 2024: 364
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Part D drug cost
Part D drug cost increased 13% from $1,789 in 2020 to $2,022 in 2024.
- 2020: $1,789
- 2021: $1,341
- 2022: $2,622
- 2023: $1,624
- 2024: $2,022
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $150.03 in 2019 to $80.53 in 2024.
- 2019: $150.03
- 2021: $465.60
- 2022: $60.28
- 2023: $21.34
- 2024: $80.53
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), 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 2024 (payments made January 1 – December 31, 2024): fewer than 11 records totaling $80.53.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Geistlich Pharma, North America, Inc. |
Food and Beverage
Cash or cash equivalent
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Geistlich Bio-Gide | General | $37.51 |
| BioHorizons Implant Systems Inc. |
Food and Beverage
In-kind items and services
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BIOHORIZONS | General | $24.39 |
| Pacira Pharmaceuticals Incorporated |
Food and Beverage
In-kind items and services
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Exparel | General | $18.63 |
Source: CMS Open Payments, program year 2024, 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 |
|---|---|---|---|---|---|
| Amoxicillin | Amoxicillin | 165 | 1,182 | $628.30 | 130 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 143 | 225 | $460.63 | 123 |
| Azithromycin | Azithromycin | 28 | 141 | $129.34 | 20 |
| Doxycycline Hyclate | Doxycycline Hyclate | 16 | 266 | $326.29 | — |
| Fluocinonide | Fluocinonide | 12 | 330 | $477.72 | — |
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: 204E00000X
Oral and maxillofacial surgeons are trained to recognize and treat a wide spectrum of diseases, injuries and defects in the head, neck, face, jaws and the hard and soft tissues of the oral and maxillofacial region. They are also trained to administer anesthesia, and provide care in an office setting. They are trained to treat problems such as the extraction of wisdom teeth, misaligned jaws, tumors and cysts of the jaw and mouth, and to perform dental implant surgery.
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 - Oral and Maxillofacial Surgery
Doctor of Dental Surgery
Dentist - Oral and Maxillofacial Surgery
Doctor of Dental Surgery
Career & Practice History
NPI enumerated November 01, 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
Other Oral & Maxillofacial Surgery Specialists in Chicago
- Dr. James Murphy, DDS, MD
- Dr. Othman Rezki, DMD
- Dr. Ali Al-Qudsi, DMD
- Dr. Louis Halkias, DDS, MS
- Dr. Biraj Shah, DDS, MD
- Dr. David Reisberg, DDS
Mailing Address
676 N Saint Clair St, Suite 2280
Chicago, IL 606112927
Phone: 3129262929