Doctor profile · Federal record
Dr. Jonathan Ernst, MD
Family Medicine Physician (CMS: Family Practice) · Internal Medicine Physician · Pediatrics Physician · Madison, WI
- NPI 1548675697
- Accepts Medicare
- 12 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
1211 Fish Hatchery RD
Madison, WI 537151909
(608) 252-8000
fax (608) 283-7160 - Additional location
-
1313 Fish Hatchery RD
Madison, WI 537151911
Credentials & registration
- NPI registered
- June 2014 — 12 yrs on file
- Profile last updated
- May 24, 2022
- Year of graduation
- 2014 — 12 yrs since
- Specialty taxonomy
- 207Q00000X — NUCC code
- State license (1)
- Wisconsin #67864-20
- Medicaid
- WI #1548675697
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1548675697. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
401
Distinct HCPCS
8
Medicare allowed
$33,500
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 163 | 161 | $86 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 119 | 118 | $122 | |
36415 |
Insertion of needle into vein for collection of blood sample | 38 | 37 | $8 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 25 | 25 | $124 | |
G0008 |
Administration of influenza virus vaccine | 17 | 17 | $29 | |
81001 |
Manual urinalysis test with examination using microscope, automated | 14 | 13 | $3 | |
90694 |
Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage | 13 | 13 | $75 | |
85027 |
Complete blood cell count (red cells, white blood cell, platelets), automated test | 12 | 12 | $6 |
In context: peer comparison
Among 72 peers in Madison Family Medicine Physician, average services per provider: 52. This provider delivers 7.7× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
310
Patients
195
Total drug cost
$3,592
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) | Brand | 35 | 34 | $446 |
| Atorvastatin Calcium | Generic | 30 | 16 | $405 |
| Cephalexin | Generic | 26 | 25 | $193 |
| Doxycycline Hyclate | Generic | 26 | 25 | $371 |
| Losartan Potassium | Generic | 23 | 11 | $350 |
| Prednisone | Generic | 21 | 21 | $86 |
| Metformin Hcl ER (Metformin Hcl) | Brand | 19 | 0 | $267 |
| Naproxen | Generic | 19 | 19 | $63 |
| Triamcinolone Acetonide | Generic | 19 | 16 | $217 |
| Diclofenac Sodium | Generic | 17 | 11 | $326 |
Frequently asked questions
What is Dr. Jonathan Ernst's medical specialty?
Dr. Jonathan Ernst practices Family Medicine Physician in Madison, WI.
Where does Dr. Jonathan Ernst practice?
Dr. Jonathan Ernst practices at 1211 Fish Hatchery RD, Madison, WI 537151909. Office phone: 6082528000.
What is Dr. Jonathan Ernst's NPI?
Dr. Jonathan Ernst's National Provider Identifier (NPI) is 1548675697, issued by NPPES.
Does Dr. Jonathan Ernst accept Medicare assignment?
Yes. Dr. Jonathan Ernst accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Jonathan Ernst commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Insertion of needle into vein for collection of blood sample (HCPCS 36415). Source: CMS Medicare Physician & Other Practitioners file.