Lucas Fass
- Part D claims, 2024
- 11
- Hospital affiliations
- 2
- Industry payments
- $35
- Medical groups
- 2
- State license
- 1
- Practice address
- 800 Riverside Drive, Waupaca, WI 54981
- Practice phone
- Call (715) 258-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Lucas Fass is an internist in Waupaca, Wisconsin
Lucas Fass practices at ThedaCare Medical Center-Waupaca in Waupaca, Wisconsin, part of Froedtert ThedaCare Health.
Lucas Fass' NPI, 1427613793, was assigned on May 2, 2019. Lucas Fass graduated from Rush Medical College of Rush University in 2021. Lucas Fass holds Wisconsin license 81575-20.
- NPI
- 1427613793NPI Registry (opens in a new tab)
- NPI enumeration date
- May 2, 2019
- NPI status
- Active
- Practice phone
- (715) 258-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Lucas Fass practices at ThedaCare Medical Center-Waupaca in Waupaca, Wisconsin
Lucas Fass' primary practice is ThedaCare Medical Center-Waupaca, at 800 Riverside Drive, Waupaca, WI 54981 in Waupaca County. The practice phone is (715) 258-1000.
- ThedaCare Medical Center-Waupaca800 Riverside Drive, Waupaca, WI 54981 · Waupaca CountyPhone(715) 258-1000
Source: Dmand AI Affiliation Data
Lucas Fass is affiliated with 2 sites of care and 2 medical groups
Lucas Fass' primary practice is ThedaCare Medical Center-Waupaca in Waupaca, Wisconsin, part of Froedtert ThedaCare Health. Lucas Fass is also affiliated with University Hospital. The medical group on file is Waisman Center TIES Clinic. Dmand AI also links Lucas Fass to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Lucas Fass' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Lucas Fass practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| ThedaCare Medical Center-Waupaca | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Lucas Fass is one of 1,675 internists in Wisconsin
Internal medicine is Lucas Fass' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Lucas Fass is licensed in Wisconsin.
Specialties and state licenses
- Internal medicine, WisconsinPrimary
Internists near Lucas Fass
Counts of internists 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
Lucas Fass' patients have a median age of 44
Across all payers, Dmand AI patient panel data puts Lucas Fass' median patient age at 44, with 50% women.
Lucas Fass' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Lucas Fass wrote 11 Medicare Part D claims in 2024
In 2024, Lucas Fass wrote 11 Medicare Part D claims. 100% of them were for generic drugs. They cover 1 drug, with $711 in total drug cost.
Lucas Fass' most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Lucas Fass received $35 in industry payments in 2025
CMS Open Payments shows 1 general payment to Lucas Fass from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Sanofi and Genzyme US Companies paid the most, $35.
Companies that paid Lucas Fass the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Lucas Fass graduated from Rush Medical College of Rush University
Lucas Fass graduated from Rush Medical College of Rush University in 2021.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Lucas Fass'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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 Lucas Fass
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Lucas Fass' NPI number?
Lucas Fass' NPI number is 1427613793. It was assigned on May 2, 2019, and it is active in the NPI Registry.
What does Lucas Fass specialize in?
Lucas Fass is an internist in Waupaca, Wisconsin. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Lucas Fass practice?
Lucas Fass practices at 800 Riverside Drive, Waupaca, WI 54981. Lucas Fass' primary practice is ThedaCare Medical Center-Waupaca in Waupaca, Wisconsin, part of Froedtert ThedaCare Health. Dmand AI also links Lucas Fass to 1 medical group.
What is Lucas Fass' office phone number?
The practice phone on file for Lucas Fass is (715) 258-1000.
What is Lucas Fass' medical license number?
Lucas Fass holds Wisconsin license 81575-20.
Which hospitals is Lucas Fass affiliated with?
Lucas Fass practices at ThedaCare Medical Center-Waupaca in Waupaca, Wisconsin. Lucas Fass is also affiliated with University Hospital.
What medical group is Lucas Fass part of?
Lucas Fass is linked to Waisman Center TIES Clinic. Dmand AI links Lucas Fass to 1 more medical group.
Where did Lucas Fass go to medical school?
Lucas Fass graduated from Rush Medical College of Rush University in 2021.
What drugs does Lucas Fass prescribe most?
In 2023 Medicare Part D data, Lucas Fass' most prescribed drugs by claims were Ultra-Fine Nano Pen Needle.
Has Lucas Fass received payments from drug or device companies?
CMS Open Payments shows $35 in general payments to Lucas Fass from 1 company from 2025 to 2025. The largest total came from Sanofi and Genzyme US Companies.
How long has Lucas Fass been practicing?
Lucas Fass graduated from medical school in 2021, 5 years ago.
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