Dr. Mark William Thomas , MD
Pediatrics • Clarkston, MI
7210 N Main St Ste 205
Clarkston, MI 483461575
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 July 25, 2006; this date does not establish years in practice.
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Published CMS data list 11 Medicare Part D prescriptions, including refills, in 2017.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2017. Published rows only; this is not a quality measure.
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Published Part D records, 2017:
- Ventolin Hfa (Albuterol Sulfate) — 11 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2017. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 11 in 2013 to 11 in 2017.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2013–2017.
Practice Location & Contact Primary Location
7210 N Main St Ste 205
Clarkston, MI 483461575
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
Pediatrics: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
11 standardized 30-day fills in 2017
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
$585 in 2017
The total cost of these prescriptions in 2017, 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, 2017.
Open Payments general payments, program year 2025
All general payments: $435.71 across 22 records.
By nature of payment
- Food and Beverage: $435.71 across 22 records.
Reporting-company totals (3 largest of 10)
- Corium, LLC: $115.32 across 6 records.
- Collegium Pharmaceutical, Inc.: $91.52 across 4 records.
- Merck Sharp & Dohme LLC: $51.05 across 3 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).
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 Clarkston and Michigan
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Thomas are from 2017.
7 active clinicians are listed under Pediatrics with a practice address in Clarkston, MI (2,181 in Michigan).
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 went from 11 in 2013 to 11 in 2017.
- 2013: 11
- 2017: 11
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30-day fills
30-day fills went from 11 in 2013 to 11 in 2017.
- 2013: 11
- 2017: 11
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Part D drug cost
Part D drug cost decreased 80% from $2,969 in 2013 to $585 in 2017.
- 2013: $2,969
- 2017: $585
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $130.30 in 2021 to $435.71 in 2025.
- 2021: $130.30
- 2022: $458.55
- 2023: $553.97
- 2024: $837.10
- 2025: $435.71
Sources: CMS Medicare Part D Prescribers (2017), 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): 22 records totaling $435.71.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Corium, LLC |
Food and Beverage
In-kind items and services
|
Azstarys | General | $27.63 |
| Collegium Pharmaceutical, Inc. |
Food and Beverage
Cash or cash equivalent
|
Jornay PM | General | $26.65 |
| Sanofi and Genzyme US Companies |
Food and Beverage
In-kind items and services
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TZIELD | General | $25.95 |
| Sanofi Pasteur Inc. |
Food and Beverage
In-kind items and services
|
FLUZONE QUADRIVALENT NORTHERN HEMISPHERE | General | $23.12 |
| Collegium Pharmaceutical, Inc. |
Food and Beverage
Cash or cash equivalent
|
Jornay PM | General | $22.80 |
| Collegium Pharmaceutical, Inc. |
Food and Beverage
Cash or cash equivalent
|
Jornay PM | General | $22.07 |
| ALK-Abello, Inc |
Food and Beverage
In-kind items and services
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Ragwitek | General | $22.05 |
| ALK-Abello, Inc |
Food and Beverage
In-kind items and services
|
NEFFY | General | $21.20 |
| ARS Pharmaceuticals Operations, Inc. |
Food and Beverage
In-kind items and services
|
NEFFY | General | $20.73 |
| Collegium Pharmaceutical, Inc. |
Food and Beverage
Cash or cash equivalent
|
Jornay PM | General | $20.00 |
| Corium, LLC |
Food and Beverage
In-kind items and services
|
Azstarys | General | $19.13 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
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ROTATEQ | General | $18.96 |
| Tris Pharma Inc |
Food and Beverage
In-kind items and services
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Dyanavel XR | General | $18.85 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
|
ROTATEQ | General | $17.66 |
| Corium, LLC |
Food and Beverage
In-kind items and services
|
Azstarys | General | $17.62 |
| Corium, LLC |
Food and Beverage
In-kind items and services
|
Azstarys | General | $17.40 |
| Corium, LLC |
Food and Beverage
In-kind items and services
|
Azstarys | General | $17.30 |
| Corium, LLC |
Food and Beverage
In-kind items and services
|
Azstarys | General | $16.24 |
| Pfizer Inc. |
Food and Beverage
In-kind items and services
|
PREVNAR 20 | General | $16.14 |
| Seqirus USA Inc |
Food and Beverage
In-kind items and services
|
Flucelvax | General | $15.96 |
| Merck Sharp & Dohme LLC |
Food and Beverage
In-kind items and services
|
ROTATEQ | General | $14.43 |
| Tris Pharma Inc |
Food and Beverage
In-kind items and services
|
Dyanavel XR | General | $13.82 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2017.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Ventolin Hfa | Albuterol Sulfate | 11 | 330 | $584.65 | — |
Source: CMS Part D by Provider and Drug, 2017; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 208000000X
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
NUCC Taxonomy Code: 170100000X
A medical geneticist works in association with a medical specialist, is affiliated with a clinical genetics program, and serves as a consultant to medical and dental specialists.
Career & Practice History
NPI enumerated July 25, 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 Pediatrics Specialists in Clarkston
Healthcare providers in ClarkstonMailing Address
19186 Chelton Dr
Beverly Hills, MI 480255212
Phone: 2486259755