Dr. Jonathan R. Ernst, MD
- Medicare services, 2024
- 374
- Medicare patients, 2024
- 294
- Part D claims, 2024
- 908
- Hospital affiliations
- 4
- Medical group
- 1
- Practice address
- 1821 S. Stoughton Rd, Madison, WI 53716
- Practice phone
- Call (608) 250-1560
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Imaging Services at SSM Health Dean Medical Group (S Stoughton Rd)
Mammography / Breast Imaging Center · Madison, Wisconsin
Find Dr. Ernst's professional email, personal email and mobile number
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Dr. Jonathan R. Ernst is a family medicine physician in Madison, Wisconsin
Dr. Ernst practices at Imaging Services at SSM Health Dean Medical Group (S Stoughton Rd) in Madison, Wisconsin.
Dr. Ernst's NPI, 1548675697, was assigned on June 27, 2014. Dr. Ernst holds Wisconsin license 67864-20.
- NPI
- 1548675697NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0840503637
- NPI enumeration date
- June 27, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (608) 250-1560
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jonathan R. Ernst practices at Imaging Services at SSM Health Dean Medical Group (S Stoughton Rd) in Madison, Wisconsin
Dr. Ernst's primary practice is Imaging Services at SSM Health Dean Medical Group (S Stoughton Rd), at 1821 S. Stoughton Rd, Madison, WI 53716. The practice phone is (608) 250-1560.
- Imaging Services at SSM Health Dean Medical Group (S Stoughton Rd)1821 S. Stoughton Rd, Madison, WI 53716Phone(608) 250-1560
Source: Dmand AI Affiliation Data
Dr. Jonathan R. Ernst is affiliated with 6 sites of care and 1 medical group
Dr. Ernst's primary practice is Imaging Services at SSM Health Dean Medical Group (S Stoughton Rd) in Madison, Wisconsin. Dr. Ernst is also affiliated with SSM Health St. Mary's Hospital - Madison. The medical group on file is SSM Health Dean Medical Group. Dmand AI also links Dr. Ernst to 3 more hospitals and 1 group practice or clinic, each named with a free account. Dr. Ernst's employer is on file too: a breast imaging center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jonathan R. Ernst's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ernst practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Imaging Services at SSM Health Dean Medical Group (S Stoughton Rd) | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jonathan R. Ernst is one of 3,101 family medicine physicians in Wisconsin
Family medicine is Dr. Ernst's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Ernst is licensed in Wisconsin.
Specialties and state licenses
- Family medicine, WisconsinPrimary
Family medicine physicians near Dr. Ernst
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. Jonathan R. Ernst billed Medicare for 374 services in 2024
CMS data shows 374 Medicare services from Dr. Ernst across 9 procedure codes in 2024, for 294 Medicare patients. Medicare paid $20,904 for them. Every service was in an office.
Dr. Ernst's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2822024: 23417%
- Other services
- 2023: 422024: 4917%
- Tests and treatments
- 2023: 132024: 42223%
- Surgery
- 2023: 382024: 38No change
- Lab and pathology
- 2023: 262024: 1158%
Dr. Ernst compared with the Wisconsin median for family medicine physicians, 2024
- Dr. Ernst
- Wisconsin median
- Medicare services
- 374vs 28432% above
- Medicare patients
- 294vs 1412.1 times
- Part D claims
- 518vs 1,10653% below
Medians across 3,266 family medicine physicians in Wisconsin with Dmand AI profiles that report each measure.
Dr. Ernst's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jonathan R. Ernst treated 294 Medicare patients in 2024, average age 73
CMS counts 294 Medicare patients who saw Dr. Ernst in 2024. The largest group is 65 to 74, with 136 patients. 72% of them have high cholesterol, and 62% have high blood pressure. 16% are also on Medicaid. Their average risk score is 1.09, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ernst's median patient age at 54, with 51% women.
Dr. Ernst's Medicare patients by age, 2024
Dr. Ernst's Medicare patients by sex, 2024
- Women14650%
- Men14850%
Chronic conditions among Dr. Ernst's Medicare patients, 2024
- High cholesterol72%
- High blood pressure62%
- Arthritis33%
- Diabetes33%
- Anxiety26%
- Mood disorders25%
- Chronic kidney disease22%
- Depression22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ernst's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women51%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jonathan R. Ernst wrote 908 Medicare Part D claims in 2024
In 2024, Dr. Ernst wrote 908 Medicare Part D claims for 331 patients. 91% of them were for generic drugs. CMS names the drug for 518 of them, across 28 drugs with 11 or more claims each, at $18,710 in total drug cost. In 2023, CMS named 368 claims across 20 drugs.
Dr. Ernst's Part D claims by kind of drug, 2024
- Generic829 claims91%
- Brand-name79 claims9%
Dr. Ernst'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. Ernst's Part D claims, 2024
- Opioids2%17 of 908 claims
- Antibiotics12%107 of 908 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: 3682024: 51841%
Drugs named by CMS: 28 in 2024, 20 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. Jonathan R. Ernst offers telehealth to Medicare patients
Dr. Ernst accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ernst as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal or shaving of skin growth: 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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Sources for Dr. Jonathan R. Ernst'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) |
| 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) |
| 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. Jonathan R. Ernst
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. Jonathan R. Ernst's NPI number?
Dr. Jonathan R. Ernst's NPI number is 1548675697. It was assigned on June 27, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan R. Ernst?
Dr. Jonathan R. Ernst is a family medicine physician in Madison, Wisconsin. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Jonathan R. Ernst practice?
Dr. Ernst practices at 1821 S. Stoughton Rd, Madison, WI 53716. Dr. Ernst's primary practice is Imaging Services at SSM Health Dean Medical Group (S Stoughton Rd) in Madison, Wisconsin. Dmand AI also links Dr. Ernst to 3 hospitals and 1 group practice or clinic.
What is Dr. Jonathan R. Ernst's office phone number?
The practice phone on file for Dr. Ernst is (608) 250-1560.
What is Dr. Jonathan R. Ernst's medical license number?
Dr. Ernst holds Wisconsin license 67864-20.
Which hospitals is Dr. Jonathan R. Ernst affiliated with?
Dr. Ernst is affiliated with SSM Health St. Mary's Hospital - Madison. Dmand AI links Dr. Ernst to 3 more hospitals.
What medical group is Dr. Jonathan R. Ernst part of?
Dr. Ernst is linked to SSM Health Dean Medical Group.
Does Dr. Jonathan R. Ernst accept Medicare?
Yes. CMS data shows Dr. Ernst billed Medicare for 374 services in 2024, and Dr. Ernst accepts Medicare assignment.
Does Dr. Jonathan R. Ernst offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ernst as offering telehealth services.
How many Medicare patients does Dr. Jonathan R. Ernst see?
CMS counts 294 Medicare patients who saw Dr. Ernst in 2024, with an average age of 73.
Show 3 more questionsShow fewer questions
What services does Dr. Jonathan R. Ernst bill to Medicare?
In 2024, Dr. Ernst's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and surgery: heart and blood vessels (36415).
What drugs does Dr. Jonathan R. Ernst prescribe most?
In 2024 Medicare Part D data, Dr. Ernst's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Amoxicillin-Clavulanate Potass.
How long has Dr. Jonathan R. Ernst been practicing?
Dr. Ernst graduated from medical school in 2014, 12 years ago.
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