Dr. Jon S. Ahrendsen, MD
- Part D claims, 2024
- 1,550
- Hospital affiliations
- 3
- Industry payments
- $827
- Medical groups
- 2
- State license
- 1
- Practice address
- 1316 South Main Street, Clarion, IA 50525
- Practice phone
- Call (515) 532-2811
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Ahrendsen'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. Jon S. Ahrendsen is a family medicine physician in Clarion, Iowa
Dr. Ahrendsen practices at Iowa Specialty Hospital - Clarion in Clarion, Iowa, part of Iowa Specialty Hospital.
Dr. Ahrendsen's NPI, 1326036062, was assigned on October 6, 2005. Dr. Ahrendsen graduated from University of Iowa, RJ & L Carver College of Medicine in 1982. Dr. Ahrendsen holds Iowa license 23659.
- NPI
- 1326036062NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941104905
- NPI enumeration date
- October 6, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (515) 532-2811
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jon S. Ahrendsen practices at Iowa Specialty Hospital - Clarion in Clarion, Iowa
Dr. Ahrendsen's primary practice is Iowa Specialty Hospital - Clarion, at 1316 South Main Street, Clarion, IA 50525 in Wright County. The practice phone is (515) 532-2811.
- Iowa Specialty Hospital - Clarion1316 South Main Street, Clarion, IA 50525 · Wright CountyPhone(515) 532-2811
Source: Dmand AI Affiliation Data
Dr. Jon S. Ahrendsen is affiliated with 6 sites of care and 2 medical groups
Dr. Ahrendsen's primary practice is Iowa Specialty Hospital - Clarion in Clarion, Iowa, part of Iowa Specialty Hospital. Dr. Ahrendsen is also affiliated with Hancock County Health System. The medical group on file is Iowa Specialty Hospitals & Clinics. Dmand AI also links Dr. Ahrendsen to 1 more hospital, 2 rural health clinics, 1 skilled nursing facility 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. Jon S. Ahrendsen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ahrendsen practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Iowa Specialty Hospital - Clarion | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Jon S. Ahrendsen is one of 1,873 family medicine physicians in Iowa
Family medicine is Dr. Ahrendsen's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Ahrendsen is licensed in Iowa.
Specialties and state licenses
- Family medicine, IowaPrimary
Family medicine physicians near Dr. Ahrendsen
Counts of family medicine physicians 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. Jon S. Ahrendsen's patients have a median age of 65
Across all payers, Dmand AI patient panel data puts Dr. Ahrendsen's median patient age at 65, with 41% women.
Dr. Ahrendsen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women41%
- Men59%
Source: Dmand AI Patient Panel Data
Dr. Jon S. Ahrendsen wrote 1,550 Medicare Part D claims in 2024
In 2024, Dr. Ahrendsen wrote 1,550 Medicare Part D claims for 118 patients. 91% of them were for generic drugs. CMS names the drug for 1,139 of them, across 47 drugs with 11 or more claims each, at $41,357 in total drug cost. In 2023, CMS named 2,290 claims across 76 drugs.
Dr. Ahrendsen's Part D claims by kind of drug, 2024
- Generic1,415 claims91%
- Brand-name119 claims8%
- Other16 claims1%
Dr. Ahrendsen'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. Ahrendsen's Part D claims, 2024
- Opioids9%138 of 1,550 claims
- Antibiotics4%55 of 1,550 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: 2,2902024: 1,13950%
Drugs named by CMS: 47 in 2024, 76 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
How Dr. Jon S. Ahrendsen takes part in Medicare
Dr. Ahrendsen 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)
For MedTech and pharma teams
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Dr. Jon S. Ahrendsen received $827 in industry payments from 2016 to 2025
CMS Open Payments shows 50 general payments to Dr. Ahrendsen from 9 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Shire North American Group Inc paid the most, $341.
General payments to Dr. Ahrendsen by program year, 2016 to 2025
Companies that paid Dr. Ahrendsen the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jon S. Ahrendsen graduated from University of Iowa, RJ & L Carver College of Medicine
Dr. Ahrendsen graduated from University of Iowa, RJ & L Carver College of Medicine in 1982.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jon S. Ahrendsen'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) |
| 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. Jon S. Ahrendsen
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. Jon S. Ahrendsen's NPI number?
Dr. Jon S. Ahrendsen's NPI number is 1326036062. It was assigned on October 6, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Jon S. Ahrendsen?
Dr. Jon S. Ahrendsen is a family medicine physician in Clarion, Iowa. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Jon S. Ahrendsen practice?
Dr. Ahrendsen practices at 1316 South Main Street, Clarion, IA 50525. Dr. Ahrendsen's primary practice is Iowa Specialty Hospital - Clarion in Clarion, Iowa, part of Iowa Specialty Hospital. Dmand AI also links Dr. Ahrendsen to 1 hospital, 2 rural health clinics, 1 skilled nursing facility and 1 medical group.
What is Dr. Jon S. Ahrendsen's office phone number?
The practice phone on file for Dr. Ahrendsen is (515) 532-2811.
What is Dr. Jon S. Ahrendsen's medical license number?
Dr. Ahrendsen holds Iowa license 23659.
Which hospitals is Dr. Jon S. Ahrendsen affiliated with?
Dr. Ahrendsen practices at Iowa Specialty Hospital - Clarion in Clarion, Iowa. Dr. Ahrendsen is also affiliated with Hancock County Health System. Dmand AI links Dr. Ahrendsen to 1 more hospital.
What medical group is Dr. Jon S. Ahrendsen part of?
Dr. Ahrendsen is linked to Iowa Specialty Hospitals & Clinics. Dmand AI links Dr. Ahrendsen to 1 more medical group.
Does Dr. Jon S. Ahrendsen accept Medicare?
Yes. CMS lists Dr. Ahrendsen as accepting Medicare assignment.
Where did Dr. Jon S. Ahrendsen go to medical school?
Dr. Ahrendsen graduated from University of Iowa, RJ & L Carver College of Medicine in 1982.
What drugs does Dr. Jon S. Ahrendsen prescribe most?
In 2024 Medicare Part D data, Dr. Ahrendsen's most prescribed drugs by claims were Levothyroxine Sodium, Oxycodone HCl and Omeprazole.
Has Dr. Jon S. Ahrendsen received payments from drug or device companies?
CMS Open Payments shows $827 in general payments to Dr. Ahrendsen from 9 companies from 2016 to 2025. The largest total came from Shire North American Group Inc.
How long has Dr. Jon S. Ahrendsen been practicing?
Dr. Ahrendsen graduated from medical school in 1982, 44 years ago.
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