NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1598020489 MD
Verify on CMS → John Joerns, MD
Internal Medicine Physician in Rochester, Minnesota.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 in Internal Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
971
Medicare Part D claims · 191 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
87%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
100/100
▲ 16 pts above national avg 83.5 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
John Joerns, MD reported a CMS MIPS final score of 100/100 - above the 83.5 national average - and filed 971 Medicare Part D claims in 2023.
- 100/100
- MIPS score · +16 vs avg
- 971
- Part D claims, 2023
- 87%
- generic prescribing
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about John Joerns, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1598020489), first enumerated 07/07/2012.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 971 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 100/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1598020489 · Internal Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · MIPS-ELITE · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1598020489
- ENUM-MID 2012
- TAX-MEGA 173K Internal Medicine
- MIPS-ELITE 100/100
- RX-LIGHT 971
- BOOK-LIGHT 3,408 in Minnesota
- PHOTO-FINISH Susan Calliste-Scott · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Joerns · this pr…
Joerns · this provider
100 MIPS pts
- David Mallin · h…
David Mallin
100 MIPS pts
- Susan Calliste-S…
Susan Calliste-Scott
100 MIPS pts
- Logan Danielson …
Logan Danielson
100 MIPS pts
- Vyacheslav Galib…
Vyacheslav Galibov
100 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
John Joerns, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
100 ≥ 91st percentile 91% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where John Joerns, MD sits
This provider among internal medicine physician peers
Across the 34,612 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, John Joerns, MD writes more Part D claims than 56% of them and scores higher on MIPS quality than 92% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one internal medicine physician peer from a representative sample of 60; the gold marker is John Joerns, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
John Joerns, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about John Joerns, MD?
High performer (top quartile)Primary specialty
Internal Medicine Physician
Medicare Part D claims
971 64% vs specialty avg
MIPS final score
100/100 16.5 pts vs avg
Specialty distribution in Minnesota
How Internal Medicine Physician compares to other specialties among Minnesota providers
Medicare quality performance, MIPS
John Joerns, MD's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 100/100
- vs 83.5 national avg · 2023 performance year
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1598020489 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/07/2012 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
99.9529
Final Score
Measured-score avg: 83.5
92.8969
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where John Joerns, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Mayo Clinic
Rochester, MN
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
John Joerns, MD - brand share 11.0%
Internal Medicine Physician average
11% brand-name claims vs 87% generic, on 971 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
971
Total Claims
$187K
Total Drug Cost
191
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,665
- Total Day Supply
- 47,649
- Brand vs Generic
- 11% brand / 87% generic
- Brand Drug Cost
- $143K
- Generic Drug Cost
- $43K
- Antibiotic Claims
- 115
Patient Demographics
- Average Patient Age
- 66.7 years
- Avg HCC Risk Score
- 3.67
- Gender Split
- 36% female / 64% male
- Age Distribution
- <65: 50, 65-74: 115, 75-84: 26, 85+: 0
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John Joerns, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisone
Prednisone
80 claims
- Azithromycin
Azithromycin
73 claims
- Pantoprazole Sodium
Pantoprazole Sodium
47 claims
- Amlodipine Besylate
Amlodipine Besylate
46 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
38 claims
- Tacrolimus
Tacrolimus
38 claims
- Metoprolol Tartrate 29
Metoprolol Tartrate
29 claims
- Valganciclovir Hcl 29
Valganciclovir Hcl
29 claims
| Drug | Claims |
|---|---|
| Prednisone | 80 |
| Azithromycin | 73 |
| Pantoprazole Sodium | 47 |
| Amlodipine Besylate | 46 |
| Rosuvastatin Calcium | 38 |
| Tacrolimus | 38 |
| Metoprolol Tartrate | 29 |
| Valganciclovir Hcl | 29 |
| Carvedilol | 27 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 26 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How John Joerns, MD fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
John Joerns, MD's 971 claims are below the specialty average of 2,716.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Joerns, both outside Minnesota so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (100 here).
Same NPPES enumeration year (2012)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Internal Medicine Physician Providers in Minnesota
Other clinicians with the same primary specialty enrolled in Minnesota, drawn from the same CMS NPPES roster as Joerns.
One of 3,408 Internal Medicine Physician providers enrolled in Minnesota, 5 are shown here.
Dr. Christopher Aakre
MD
Rochester, MN
Dr. Karen Aarestad
MD
Brainerd, MN
Dr. Peter Aas
MD
Duluth, MN
Dr. Saud Abaalkhail
M.B.,B.S.
Minneapolis, MN
Dr. Mohamad Abbas
M.D.
Saint Paul, MN
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is John Joerns, MD's specialty? ▼
John Joerns, MD specializes in Internal Medicine Physician and practices in Rochester, Minnesota. Credentials: MD.
How much does John Joerns, MD prescribe under Medicare Part D? ▼
In 2023, John Joerns, MD wrote 971 Medicare Part D claims totaling $187K in drug costs for 191 beneficiaries.
What is John Joerns, MD's Medicare quality score? ▼
John Joerns, MD has a CMS MIPS Final Score of 100/100 (Quality: 92.9). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is John Joerns, MD located? ▼
John Joerns, MD is located at 200 1ST ST SW, Rochester, MN, 55905. Phone: (507) 284-2511.
What is John Joerns, MD's NPI number? ▼
John Joerns, MD's National Provider Identifier (NPI) is 1598020489, issued on 07/07/2012.
Does John Joerns, MD prescribe more brand-name or generic drugs? ▼
John Joerns, MD's prescribing is 11% brand-name and 87% generic drugs by claim count, with $143K in brand drug costs.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does John Joerns, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, John Joerns, MD's most frequently prescribed drugs include Prednisone, Azithromycin, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Joerns, MD accept Medicare? ▼
John Joerns, MD appears in CMS Medicare data with 971 Part D claims and 191 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Joerns, MD's credentials? ▼
John Joerns, MD's NPI is 1598020489 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.