Dr. Thomas H. Diehl, MD
- Medicare services, 2023
- 24
- Medicare patients, 2024
- 27
- Part D claims, 2024
- 12
- Hospital affiliations
- 1
- Industry payments
- $10,718
- 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
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.
Dr. Thomas H. 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, 1851329528, was assigned on June 29, 2006. Dr. Diehl graduated from Ohio State University College of Medicine in 1980. Dr. Diehl holds Ohio license 35047259.
- NPI
- 1851329528NPI Registry (opens in a new tab)
- NPI enumeration date
- June 29, 2006
- NPI status
- Active
- Practice phone
- (920) 568-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 72
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Thomas H. 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 H. Diehl is affiliated with 3 sites of care and 2 medical groups
Dr. Diehl's primary practice is Fort Memorial Hospital in Fort Atkinson, Wisconsin, part of Fort HealthCare. The medical group on file is Genesis Medical Group. Dmand AI also links Dr. Diehl to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thomas H. Diehl's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Diehl practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fort Memorial Hospital | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Fort HealthCare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Thomas H. 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 Ohio.
Specialties and state licenses
- Surgery, OhioPrimary
General surgeons near Dr. Diehl
Counts of general surgeons 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
Dr. Thomas H. Diehl billed Medicare for 24 services in 2023
CMS data shows 24 Medicare services from Dr. Diehl across 2 procedure codes in 2023, all of them office visits, for 27 Medicare patients. Medicare paid $2,417 for them. Every service was in an office.
Dr. Diehl's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 1252023: 2481%
Dr. Diehl compared with the Wisconsin median for general surgeons, 2023
- Dr. Diehl
- Wisconsin median
- Medicare services
- 24vs 9976% below
- Medicare patients
- 27vs 10073% below
- Part D claims
- 26vs 3730% below
Medians across 557 general surgeons in Wisconsin with Dmand AI profiles that report each measure.
Dr. Diehl's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Diehl?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Diehl and other general surgeons in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas H. Diehl treated 27 Medicare patients in 2024, average age 71
CMS counts 27 Medicare patients who saw Dr. Diehl in 2024. The largest group is 65 to 74, with 14 patients. 70% of them have high blood pressure, and 63% have high cholesterol. Their average risk score is 1.15, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Diehl's median patient age at 71, with 47% women.
Dr. Diehl's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Diehl's Medicare patients by sex, 2024
- Women1244%
- Men1556%
Chronic conditions among Dr. Diehl's Medicare patients, 2024
- High blood pressure70%
- High cholesterol63%
Share of Medicare patients with each condition. A patient can have several.
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 71
Patient panel by sex, all payers
- Women47%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas H. Diehl wrote 12 Medicare Part D claims in 2024
In 2024, Dr. Diehl wrote 12 Medicare Part D claims. They cover 1 drug, with $95 in total drug cost. In 2021, CMS named 90 claims across 5 drugs.
Dr. Diehl's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 902022: 2671%
Drugs named by CMS: 1 in 2022, 5 in 2021.
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.
Dr. Thomas H. Diehl received $10,718 in industry payments from 2018 to 2023
CMS Open Payments shows 22 general payments to Dr. Diehl from 7 drug and device companies from 2018 to 2023. Education make up the largest share, 84% of the total. Intuitive Surgical, Inc. paid the most, $10,384.
General payments to Dr. Diehl by program year, 2018 to 2023
General payments to Dr. Diehl by kind, 2018 to 2023
- Education$9,00084%
- Travel and lodging$1,26512%
- Food and beverage$4534%
Companies that paid Dr. Diehl the most, 2018 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas H. Diehl graduated from Ohio State University College of Medicine
Dr. Diehl graduated from Ohio State University College of Medicine in 1980.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas H. 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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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 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 Dr. Thomas H. 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 H. Diehl's NPI number?
Dr. Thomas H. Diehl's NPI number is 1851329528. It was assigned on June 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas H. Diehl?
Dr. Thomas H. 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 H. 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. Dmand AI also links Dr. Diehl to 2 group practices and clinics and 1 medical group.
What is Dr. Thomas H. Diehl's office phone number?
The practice phone on file for Dr. Diehl is (920) 568-5000.
What is Dr. Thomas H. Diehl's medical license number?
Dr. Diehl holds Ohio license 35047259.
Which hospitals is Dr. Thomas H. Diehl affiliated with?
Dr. Diehl practices at Fort Memorial Hospital in Fort Atkinson, Wisconsin.
What medical group is Dr. Thomas H. Diehl part of?
Dr. Diehl is linked to Genesis Medical Group. Dmand AI links Dr. Diehl to 1 more medical group.
Does Dr. Thomas H. Diehl accept Medicare?
Yes. CMS data shows Dr. Diehl billed Medicare for 24 services in 2023.
How many Medicare patients does Dr. Thomas H. Diehl see?
CMS counts 27 Medicare patients who saw Dr. Diehl in 2024, with an average age of 71.
What services does Dr. Thomas H. Diehl bill to Medicare?
In 2023, Dr. Diehl's most billed Medicare services were office visit, new patient (99204) and office visit, new patient (99203).
Show 4 more questionsShow fewer questions
Where did Dr. Thomas H. Diehl go to medical school?
Dr. Diehl graduated from Ohio State University College of Medicine in 1980.
What drugs does Dr. Thomas H. Diehl prescribe most?
In 2022 Medicare Part D data, Dr. Diehl's most prescribed drugs by claims were Oxycodone-Acetaminophen.
Has Dr. Thomas H. Diehl received payments from drug or device companies?
CMS Open Payments shows $10,718 in general payments to Dr. Diehl from 7 companies from 2018 to 2023. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Thomas H. Diehl been practicing?
Dr. Diehl graduated from medical school in 1980, 46 years ago.
Selling to surgery practices?
See general surgeons in Wisconsin by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card