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Dr. John L. Olson, MD
NPI1194835249
- Medicare services, 2021
- 164
- Part D claims, 2022
- 131
- Publications
- 1
- Industry payments
- $318
- Affiliated sites
- 2
- Practice address
- 1000 N Oak Ave, Marshfield, WI 54449-5703
- Practice phone
- Call (715) 387-5511
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Marshfield Medical Center Professional Services
Multi-specialty group site · Marshfield, Wisconsin
Find Dr. Olson'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. John L. Olson is an internist in Manitowoc, Wisconsin
Dr. Olson practices at Marshfield Medical Center Professional Services in Marshfield, Wisconsin.
Dr. Olson's NPI, 1194835249, was assigned on August 30, 2006. Dr. Olson holds Wisconsin license 29284.
NPI and contact details
- NPI
- 1194835249NPI Registry (opens in a new tab)
- NPI enumeration date
- August 30, 2006
- NPI status
- Active
- Practice phone
- (715) 387-5511
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John L. Olson practices in Marshfield and Manitowoc
Dr. Olson's primary practice is Marshfield Medical Center Professional Services, at 1000 N Oak Ave, Marshfield, WI 54449-5703. The practice phone is (715) 387-5511. The NPI Registry lists Dr. Olson's practice address as 2300 Western Ave, Manitowoc, WI 54220.
- Marshfield Medical Center Professional ServicesPrimary1000 N Oak Ave, Marshfield, WI 54449-5703Phone(715) 387-5511
- NPI Registry address2300 Western Ave, Manitowoc, WI 54220 · Manitowoc CountyPhone(715) 387-5755
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. John L. Olson is affiliated with 2 sites of care and 2 medical groups
Dr. Olson's primary practice is Marshfield Medical Center Professional Services in Marshfield, Wisconsin. The medical group on file is Marshfield Clinic Health System. Dmand AI also links Dr. Olson to 1 more group practice or clinic and 1 medical group, each named with a free account.
Marshfield Medical Center Professional ServicesPrimary
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. John L. Olson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Olson practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Marshfield Medical Center Professional Services | 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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Dr. John L. Olson is one of 1,675 internists in Wisconsin
Internal medicine is Dr. Olson's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Olson is licensed in Wisconsin.
Specialties and state licenses
- Internal medicine, WisconsinPrimary
Internists near Dr. Olson
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
Dr. John L. Olson billed Medicare for 164 services in 2021
CMS data shows 164 Medicare services from Dr. Olson across 4 procedure codes in 2021. Medicare paid $8,003 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2021164
Paid by Medicare$8,003
Procedure codes4
Dr. Olson's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 3272021: 14954%
- Other services
- 2020: 722021: 1579%
- Tests and treatments
- 2020: 422021: 0100%
- Surgery
- 2020: 192021: 0100%
Dr. Olson compared with the Wisconsin median for internists, 2021
- Dr. Olson
- Wisconsin median
- Medicare services
- 164vs 45764% below
- Part D claims
- 131vs 43370% below
Medians across 1,658 internists in Wisconsin with Dmand AI profiles that report each measure.
Dr. Olson's most billed Medicare procedure codes, 2021
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. Olson?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Olson and other internists in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John L. Olson's patients have a median age of 75
Across all payers, Dmand AI patient panel data puts Dr. Olson's median patient age at 75, with 46% women.
Dr. Olson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women46%
- Men54%
Source: Dmand AI Patient Panel Data
Dr. John L. Olson wrote 131 Medicare Part D claims in 2022
In 2022, Dr. Olson wrote 131 Medicare Part D claims. Every claim was for a generic drug. They cover 8 drugs, with $1,120 in total drug cost. In 2021, CMS named 2,932 claims across 76 drugs.
Part D claims, 2022131
Drugs named by CMS8
Total drug cost$1,120
Dr. Olson'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: 2,9322022: 13196%
Drugs named by CMS: 8 in 2022, 76 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. John L. Olson has 1 publication on record
Dmand AI links 1 paper to Dr. Olson in 2013.
Papers1
Recent publications by Dr. Olson
See who Dr. Olson researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Olson works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John L. Olson received $318 in industry payments from 2018 to 2023
CMS Open Payments shows 8 general payments to Dr. Olson from 3 drug and device companies from 2018 to 2023. Food and beverage make up the largest share, 100% of the total. Salvin Dental Specialties, Inc. paid the most, $270.
General payments to Dr. Olson by program year, 2018 to 2023
Companies that paid Dr. Olson the most, 2018 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John L. Olson'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 Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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. John L. Olson
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. John L. Olson's NPI number?
Dr. John L. Olson's NPI number is 1194835249. It was assigned on August 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John L. Olson?
Dr. John L. Olson is an internist in Manitowoc, Wisconsin. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John L. Olson practice?
Dr. Olson practices at 1000 N Oak Ave, Marshfield, WI 54449-5703. Dr. Olson also practices at 2300 Western Ave, Manitowoc, WI 54220. Dr. Olson's primary practice is Marshfield Medical Center Professional Services in Marshfield, Wisconsin. Dmand AI also links Dr. Olson to 1 group practice or clinic and 1 medical group.
What is Dr. John L. Olson's office phone number?
The practice phone on file for Dr. Olson is (715) 387-5511.
What is Dr. John L. Olson's medical license number?
Dr. Olson holds Wisconsin license 29284.
What medical group is Dr. John L. Olson part of?
Dr. Olson is linked to Marshfield Clinic Health System. Dmand AI links Dr. Olson to 1 more medical group.
Does Dr. John L. Olson accept Medicare?
Yes. CMS data shows Dr. Olson billed Medicare for 164 services in 2021.
What services does Dr. John L. Olson bill to Medicare?
In 2021, Dr. Olson's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and medicare service (G0439).
What drugs does Dr. John L. Olson prescribe most?
In 2022 Medicare Part D data, Dr. Olson's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Lisinopril.
Has Dr. John L. Olson received payments from drug or device companies?
CMS Open Payments shows $318 in general payments to Dr. Olson from 3 companies from 2018 to 2023. The largest total came from Salvin Dental Specialties, Inc.
How long has Dr. John L. Olson been practicing?
Dr. Olson's NPI was assigned in 2006.
Does Dr. John L. Olson do research?
Dmand AI links 1 publication to Dr. Olson.
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