Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ERNST JUNIOR JOACHIM M.D.
Prescription History 1134822315
Internal Medicine in Springfield, MO

Active since March 24, 2023PECOS Enrolled
1235 E CHEROKEE ST, SPRINGFIELD, MO 65804(417) 820-2000 Get Directions

NPPES record last updated: August 31, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 31, 2026, Jul 10, 2023, Mar 24, 2023 (3 updates tracked since 2023).

Medicare Part D Prescription History

Explore the verified Medicare Part D prescription history, volume metrics, and calculated drug costs for ERNST JUNIOR JOACHIM M.D., an active Internal Medicine specialist practicing in Springfield, MO. Our medical registry currently tracks 2 unique pharmaceutical formulations prescribed by this provider, representing an estimated volume of 32 documented patient claims. Among these therapy options, the most frequently utilized medication is Atorvastatin Calcium, which accounts for 19 claims alone. Use the table below to sort by claims, cost, or utilization compared with the state average; select any medication for its full profile.

2
Medications
32
Total Claims
78
30-Day Fills
Atorvastatin Calcium
Most Prescribed · 19 claims
View details
2 medications · 2024 Medicare Part D
Medicare Part D medications prescribed by ERNST JUNIOR JOACHIM M.D. in 2024, with prescription volumes, average cost per fill, and MO state comparisons
Medication Prescriptions (2024)Rx (2024) Avg Cost per FillCost / Fill Vs. Other MO PrescribersVs. MO Avg
Atorvastatin Calcium19$8.13▼ below MO avg▼ Less than typical

About Atorvastatin Calcium: Atorvastatin is used along with a proper diet to help lower "bad" cholesterol and fats (such as LDL, triglycerides) and raise "good" cholesterol (HDL) in the blood. Show more ▾

It belongs to a group of drugs known as "statins." It works by reducing the amount of cholesterol made by the liver. Lowering "bad" cholesterol and triglycerides and raising "good" cholesterol decreases the risk of heart disease and helps prevent strokes and heart attacks. In addition to eating a proper diet (such as a low-cholesterol/low-fat diet), other lifestyle changes that may help this medication work better include exercising, losing weight if overweight, and stopping smoking. Consult your doctor for more details. A pyrrole and heptanoic acid derivative, HYDROXYMETHYLGLUTARYL-COA REDUCTASE INHIBITOR (statin), and ANTICHOLESTEREMIC AGENT that is used to reduce serum levels of LDL-CHOLESTEROL; APOLIPOPROTEIN B; and TRIGLYCERIDES. It is used to increase serum levels of HDL-CHOLESTEROL in the treatment of HYPERLIPIDEMIAS, and for the prevention of CARDIOVASCULAR DISEASES in patients with multiple risk factors.

In 2024, this provider wrote 19 Medicare prescriptions for Atorvastatin Calcium, about 8% of the volume of the typical Missouri prescriber of this medication (225.3). Medicare paid an average of $8.13 per fill, versus $8.36 statewide.

How often this provider prescribes it

This provider
19
MO average
225.3

This provider prescribes this medication less often than the average MO prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$8.13
MO average
$8.36

This provider's average cost per fill is below the MO average for this medication.

55
30-Day Fills
standardized to 30-day supplies
1,650
Days of Medication
total across all patients in 2024
Metformin Hcl13$3.71▼ below MO avg▼ Less than typical

About Metformin Hcl: Metformin is used with a proper diet and exercise program and possibly with other medications to control high blood sugar. Show more ▾

It is used in patients with type 2 diabetes. Controlling high blood sugar helps prevent kidney damage, blindness, nerve problems, loss of limbs, and sexual function problems. Proper control of diabetes may also lessen your risk of a heart attack or stroke. Metformin works by helping to restore your body's proper response to the insulin you naturally produce. It also decreases the amount of sugar that your liver makes and that your stomach/intestines absorb. A biguanide hypoglycemic agent used in the treatment of non-insulin-dependent diabetes mellitus not responding to dietary modification. Metformin improves glycemic control by improving insulin sensitivity and decreasing intestinal absorption of glucose. (From Martindale, The Extra Pharmacopoeia, 30th ed, p289)

In 2024, this provider wrote 13 Medicare prescriptions for Metformin Hcl, about 12% of the volume of the typical Missouri prescriber of this medication (105.5). Medicare paid an average of $3.71 per fill, versus $6.52 statewide.

How often this provider prescribes it

This provider
13
MO average
105.5

This provider prescribes this medication less often than the average MO prescriber. Utilization reflects practice size as well as clinical preference.

What Medicare paid per fill

This provider
$3.71
MO average
$6.52

This provider's average cost per fill is below the MO average for this medication.

23
30-Day Fills
standardized to 30-day supplies
690
Days of Medication
total across all patients in 2024
No medications match the current filters.
▲ More than typical≈ Typical▼ Less than typical= prescription volume vs the average MO prescriber of the same medication; volume reflects practice size as well as clinical preference.Green cost= below the MO average cost per fill.

About this data. The prescription history for ERNST JUNIOR JOACHIM M.D. is compiled from the Centers for Medicare & Medicaid Services (CMS) Medicare Part D Prescriber Public Use File for calendar year 2024, the most recent federal release. Figures cover prescriptions filled for Medicare Part D beneficiaries only; prescriptions under private insurance, Medicaid, or self-pay plans are not included. Because prescribing decisions are generally consistent across coverage types, this record offers a useful view of the overall Internal Medicine prescribing approach at this Springfield, MO practice.

Reading the costs. Drug costs are gross amounts paid to pharmacies under Part D, including both plan and beneficiary payments. They are not the price a patient pays at the pharmacy counter. Medications with fewer than 11 claims are excluded from the federal source data, and state comparisons use the average among MO prescribers of the same medication and form, shown only when at least five prescribers contribute. Always confirm current medications and costs directly with the provider and your plan.

About the medication summaries. Drug use descriptions come from the CMS Medicare Part D Drug Spending Dashboard (2024), and substance definitions from Medical Subject Headings (MeSH) 2026, U.S. National Library of Medicine. They are summaries that do not contain all possible information about a medication and are not individual medical advice. Ask a health care professional about any medication and your specific health needs.