Thomas J. Mark
- Medicare patients, 2024
- 360
- Part D claims, 2024
- 5,564
- Hospital affiliations
- 5
- Medical group
- 1
- State license
- 1
- Practice address
- 333 Madison St, Joliet, IL 60435
- Practice phone
- Call (815) 725-7133
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St Joseph Medical Center - Joliet
Joliet, Illinois
Find Thomas Mark's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Thomas J. Mark is a physician assistant in Joliet, Illinois
Thomas Mark practices at St Joseph Medical Center - Joliet in Joliet, Illinois.
Thomas Mark's NPI, 1255577649, was assigned on January 6, 2009. Thomas Mark holds Illinois license 085003372.
- NPI
- 1255577649NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183858400
- NPI enumeration date
- January 6, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (815) 725-7133
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Thomas J. Mark practices at St Joseph Medical Center - Joliet in Joliet, Illinois
Thomas Mark's primary practice is St Joseph Medical Center - Joliet, at 333 Madison St, Joliet, IL 60435 in Will County. The practice phone is (815) 725-7133.
- St Joseph Medical Center - Joliet333 Madison St, Joliet, IL 60435 · Will CountyPhone(815) 725-7133
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Thomas J. Mark is affiliated with 7 sites of care and 1 medical group
Thomas Mark's primary practice is St Joseph Medical Center - Joliet in Joliet, Illinois. Thomas Mark is also affiliated with Saint Joseph Medical Center. The medical group on file is Prime Healthcare Illinois Medical Group. Dmand AI also links Thomas Mark to 4 more hospitals and 1 home health agency, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Thomas J. Mark's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Thomas Mark practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St Joseph Medical Center - Joliet | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Thomas J. Mark is one of 4,299 physician assistants in Illinois
Physician assistant is Thomas Mark's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Thomas Mark is licensed in Illinois.
Specialties and state licenses
- Physician assistant, IllinoisPrimary
Physician assistants near Thomas Mark
Counts of physician assistants with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Thomas J. Mark treated 360 Medicare patients in 2024, average age 75
CMS counts 360 Medicare patients who saw Thomas Mark in 2024. The largest group is 65 to 74, with 152 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 11% are also on Medicaid. Their average risk score is 1.22, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Thomas Mark's median patient age at 67, with 53% women.
Thomas Mark's Medicare patients by age, 2024
Thomas Mark's Medicare patients by sex, 2024
- Women18953%
- Men17148%
Chronic conditions among Thomas Mark's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis50%
- Ischemic heart disease35%
- Diabetes31%
- COPD23%
- Anxiety21%
- Atrial fibrillation21%
Share of Medicare patients with each condition. A patient can have several.
Thomas Mark's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Thomas J. Mark wrote 5,564 Medicare Part D claims in 2024
In 2024, Thomas Mark wrote 5,564 Medicare Part D claims for 677 patients. 84% of them were for generic drugs.
Thomas Mark's Part D claims by kind of drug, 2024
- Generic4,683 claims84%
- Brand-name801 claims14%
- Other80 claims1%
Drug classes CMS tracks in Thomas Mark's Part D claims, 2024
- Opioids2%112 of 5,564 claims
- Antibiotics2%131 of 5,564 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Thomas J. Mark takes part in Medicare
Thomas Mark accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Sources for Thomas J. Mark's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Thomas J. Mark
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Thomas J. Mark's NPI number?
Thomas J. Mark's NPI number is 1255577649. It was assigned on January 6, 2009, and it is active in the NPI Registry.
What does Thomas J. Mark specialize in?
Thomas J. Mark is a physician assistant in Joliet, Illinois. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Thomas J. Mark practice?
Thomas Mark practices at 333 Madison St, Joliet, IL 60435. Thomas Mark's primary practice is St Joseph Medical Center - Joliet in Joliet, Illinois. Dmand AI also links Thomas Mark to 4 hospitals and 1 home health agency.
What is Thomas J. Mark's office phone number?
The practice phone on file for Thomas Mark is (815) 725-7133.
What is Thomas J. Mark's medical license number?
Thomas Mark holds Illinois license 085003372.
Which hospitals is Thomas J. Mark affiliated with?
Thomas Mark is affiliated with Saint Joseph Medical Center. Dmand AI links Thomas Mark to 4 more hospitals.
What medical group is Thomas J. Mark part of?
Thomas Mark is linked to Prime Healthcare Illinois Medical Group.
Does Thomas J. Mark accept Medicare?
Yes. CMS lists Thomas Mark as accepting Medicare assignment.
How many Medicare patients does Thomas J. Mark see?
CMS counts 360 Medicare patients who saw Thomas Mark in 2024, with an average age of 75.
How long has Thomas J. Mark been practicing?
Thomas Mark graduated from medical school in 2008, 18 years ago.
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