Global HealthHealthcare DisparitiesHealth Status Disparities
Dr. Thomas Diehl, MD
NPI1134617608PAC ID5294082137
- Part D claims, 2024
- 15
- Publications
- 12
- Hospital affiliations
- 1
- Industry payments
- $2,332
- Medical group
- 1
- Practice address
- 611 Sherman Ave E, Fort Atkinson, WI 53538
- Practice phone
- Call (920) 568-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Diehl's professional email, personal email and mobile number
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Dr. Thomas Diehl is a general surgeon in Fort Atkinson, Wisconsin
Dr. Diehl practices at Fort Memorial Hospital in Fort Atkinson, Wisconsin, part of Fort HealthCare.
Dr. Diehl's NPI, 1134617608, was assigned on April 30, 2018. Dr. Diehl holds Wisconsin license 73097-20.
NPI and contact details
- NPI
- 1134617608NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5294082137
- NPI enumeration date
- April 30, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (920) 568-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas Diehl practices at Fort Memorial Hospital in Fort Atkinson, Wisconsin
Dr. Diehl's primary practice is Fort Memorial Hospital, at 611 Sherman Ave E, Fort Atkinson, WI 53538 in Jefferson County. The practice phone is (920) 568-5000.
- Fort Memorial Hospital611 Sherman Ave E, Fort Atkinson, WI 53538 · Jefferson CountyPhone(920) 568-5000
Source: Dmand AI Affiliation Data
Dr. Thomas Diehl is affiliated with 1 site of care and 1 medical group
Dr. Diehl's primary practice is Fort Memorial Hospital in Fort Atkinson, Wisconsin, part of Fort HealthCare. The medical group on file is Fort HealthCare.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thomas Diehl's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Diehl practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fort Memorial Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas Diehl is one of 565 general surgeons in Wisconsin
Surgery is Dr. Diehl's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Diehl is licensed in Wisconsin.
Specialties and state licenses
- Surgery, WisconsinPrimary
General surgeons near Dr. Diehl
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
565general surgeons in Wisconsin
7general surgeons in Fort Atkinson
5general surgeons at Fort Memorial HospitalSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Thomas Diehl's patients have a median age of 57
Across all payers, Dmand AI patient panel data puts Dr. Diehl's median patient age at 57, with 52% women.
Dr. Diehl's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women52%
- Men47%
Source: Dmand AI Patient Panel Data
Dr. Thomas Diehl wrote 15 Medicare Part D claims in 2024
In 2024, Dr. Diehl wrote 15 Medicare Part D claims for 14 patients. 100% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $25 in total drug cost. In 2023, CMS named 36 claims across 1 drug.
Part D claims, 202415
Drugs named by CMS1
Total drug cost$25
Part D patients14
Dr. Diehl's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Diehl's Part D claims, 2024
- Opioids93%14 of 15 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 362024: 1461%
Drugs named by CMS: 1 in 2024, 1 in 2023.
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
Dr. Thomas Diehl ranks in the 64th percentile for colonoscopy in Medicare
Dr. Diehl accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 52 procedures of colonoscopy by Dr. Diehl, more than 64% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Diehl ranks in Medicare procedure volume
- Colonoscopy
- 64th percentile52 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 58th percentile35 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Mastectomy: 1 to 10 procedures (CMS shows small counts as a range)
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Thomas Diehl has 12 publications on record
Dmand AI links 12 papers to Dr. Diehl, published from 2021 to 2025. 2022 was the busiest year, with 4. The most frequent topics are Telemedicine, Mobile Applications and Pilot Projects. Dr. Diehl's most frequent co-authors are Syed Nabeel Zafar, MD, MPH, Kaleem Sohail Ahmed, MD and Daniel Erik Abbott, MD.
Papers12
Years published2021 to 2025
Dr. Diehl's papers by year, 2021 to 2025
Topics Dr. Diehl writes about most
- Telemedicine
- Mobile Applications
- Pilot Projects
Dr. Diehl's most frequent co-authors
- Syed Nabeel Zafar, MD, MPH6 shared papers
- Kaleem Sohail Ahmed, MD4 shared papers
- Daniel Erik Abbott, MD3 shared papers
Recent publications by Dr. Diehl
Developing CountriesEthiopiaPerioperative Care
Anti-Bacterial AgentsGastroschisisInpatients
See who Dr. Diehl researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Diehl works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Thomas Diehl received $2,332 in industry payments from 2024 to 2025
CMS Open Payments shows 8 general payments to Dr. Diehl from 3 drug and device companies from 2024 to 2025. Education make up the largest share, 64% of the total. Intuitive Surgical, Inc. paid the most, $1,609.
General payments to Dr. Diehl by program year, 2024 to 2025
General payments to Dr. Diehl by kind, 2024 to 2025
$2.3Kin total
- Education$1,50064%
- Travel and lodging$65328%
- Food and beverage$1798%
Companies that paid Dr. Diehl the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Thomas Diehl'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (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 Dr. Thomas Diehl
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Thomas Diehl's NPI number?
Dr. Thomas Diehl's NPI number is 1134617608. It was assigned on April 30, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Diehl?
Dr. Thomas Diehl is a general surgeon in Fort Atkinson, Wisconsin. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Thomas Diehl practice?
Dr. Diehl practices at 611 Sherman Ave E, Fort Atkinson, WI 53538. Dr. Diehl's primary practice is Fort Memorial Hospital in Fort Atkinson, Wisconsin, part of Fort HealthCare.
What is Dr. Thomas Diehl's office phone number?
The practice phone on file for Dr. Diehl is (920) 568-5000.
What is Dr. Thomas Diehl's medical license number?
Dr. Diehl holds Wisconsin license 73097-20.
Which hospitals is Dr. Thomas Diehl affiliated with?
Dr. Diehl practices at Fort Memorial Hospital in Fort Atkinson, Wisconsin.
What medical group is Dr. Thomas Diehl part of?
Dr. Diehl is linked to Fort HealthCare.
Does Dr. Thomas Diehl accept Medicare?
Yes. CMS lists Dr. Diehl as accepting Medicare assignment.
What drugs does Dr. Thomas Diehl prescribe most?
In 2024 Medicare Part D data, Dr. Diehl's most prescribed drugs by claims were Oxycodone HCl.
Has Dr. Thomas Diehl received payments from drug or device companies?
CMS Open Payments shows $2,332 in general payments to Dr. Diehl from 3 companies from 2024 to 2025. The largest total came from Intuitive Surgical, Inc.
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How long has Dr. Thomas Diehl been practicing?
Dr. Diehl graduated from medical school in 2018, 8 years ago.
Does Dr. Thomas Diehl do research?
Dmand AI links 12 publications to Dr. Diehl, published from 2021 to 2025.
Who does Dr. Thomas Diehl publish with?
Dr. Diehl's most frequent co-authors are Syed Nabeel Zafar, MD, MPH (6 shared papers), Kaleem Sohail Ahmed, MD (4 shared papers) and Daniel Erik Abbott, MD (3 shared papers).
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