NPI registry status
Active
2026 NPPES data Geriatric Medicine (Family Medicine) Physician NPI 1093714818 D.O.
Verify on CMS → Jack Bartoszek, D.O.
Geriatric Medicine (Family Medicine) Physician in Mishawaka, Indiana.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,779 in Geriatric Medicine (Family 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
5K
Medicare Part D claims · 109 beneficiaries · Geriatric Medicine (Family Medicine) Physician avg: 5K
Generic prescribing
86%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$765.87
13 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Jack Bartoszek, D.O. filed 4,575 Medicare Part D claims in 2023 as a Geriatric Medicine (Family Medicine) Physician in Mishawaka, Indiana, prescribing 86% generic.
- 5K
- Part D claims, 2023
- 86%
- generic prescribing
- $765.87
- industry payments (Sunshine Act)
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.
Jack Bartoszek, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
4,575 Top 7% higher than 93% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. 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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Jack Bartoszek, D.O. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Jack Bartoszek, D.O.?
Quality data not reportedPrimary specialty
Geriatric Medicine (Family Medicine) Physician
Medicare Part D claims
4,575 6% vs specialty avg
Specialty distribution in Indiana
How Geriatric Medicine (Family Medicine) Physician compares to other specialties among Indiana providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Geriatric Medicine (Family Medicine) Physician. Verify directly:
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).
Jack Bartoszek, D.O. appears in the CMS NPPES registry as a Geriatric Medicine (Family Medicine) Physician provider holding D.O. credentials at 615 FULMER RD, Mishawaka, IN, 46544, with a listed phone of (574) 252-3085. NPI 1093714818 was issued on 07/14/2005.
Medicare Part D records for calendar year 2023 show 4,575 prescription claims written by this provider, covering 109 Medicare beneficiaries and totaling roughly $410K in drug spend, split 13% brand-name and 86% generic by claim count, with an opioid prescribing rate of 1.1%.
Geriatric Medicine (Family Medicine) Physician is a narrow specialty nationwide, with 1,779 enrolled providers across 52 states and an average of 4,854 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1093714818 |
|---|---|
| Specialty | Geriatric Medicine (Family Medicine) Physician |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 07/14/2005 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Jack Bartoszek, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$766
Largest payer
Teva Pharmaceuticals USA, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Typical
Jack Bartoszek, D.O. - brand share 13.0%
Geriatric Medicine (Family Medicine) Physician average
13% brand-name claims vs 86% generic, on 4,575 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.
4,575
Total Claims
$410K
Total Drug Cost
109
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,598
- Total Day Supply
- 103,758
- Brand vs Generic
- 13% brand / 86% generic
- Brand Drug Cost
- $280K
- Generic Drug Cost
- $128K
- Opioid Claims
- 51 (1.1% rate)
- Antibiotic Claims
- 91
Patient Demographics
- Average Patient Age
- 71.8 years
- Avg HCC Risk Score
- 2.85
- Gender Split
- 52% female / 48% male
- Age Distribution
- <65: 27, 65-74: 33, 75-84: 35, 85+: 14
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Jack Bartoszek, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
251 claims
- Levothyroxine Sodium
Levothyroxine Sodium
239 claims
- Amlodipine Besylate
Amlodipine Besylate
173 claims
- Sertraline Hcl
Sertraline Hcl
150 claims
- Furosemide
Furosemide
139 claims
- Donepezil Hcl
Donepezil Hcl
134 claims
- Tamsulosin Hcl
Tamsulosin Hcl
121 claims
- Gabapentin
Gabapentin
109 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 251 |
| Levothyroxine Sodium | 239 |
| Amlodipine Besylate | 173 |
| Sertraline Hcl | 150 |
| Furosemide | 139 |
| Donepezil Hcl | 134 |
| Tamsulosin Hcl | 121 |
| Gabapentin | 109 |
| Eliquis Apixaban | 96 |
| Potassium Chloride | 93 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Geriatric Medicine (Family Medicine) Physician in IN →
All providers in Indiana →
Compare specialties →
Geriatric Medicine (Family Medicine) Physician Overview
How Jack Bartoszek, D.O. fits within the Geriatric Medicine (Family Medicine) Physician landscape nationally.
1,779
Geriatric Medicine (Family Medicine) Physician Providers in US
52
States with Geriatric Medicine (Family Medicine) Physician
4,854
Avg Claims per Provider
Jack Bartoszek, D.O.'s 4,575 claims are below the specialty average of 4,854.
Nearby Geriatric Medicine (Family Medicine) Physician Providers in Indiana
Other clinicians with the same primary specialty enrolled in Indiana, drawn from the same CMS NPPES roster as Bartoszek.
Dr. Herbert Acker
MD
Fort Wayne, IN
Dr. Sarah Adrian-Stephenson
NP
Avon, IN
Dr. Thomas Alley
M.D.
Indianapolis, IN
Dr. James Buchanan
MD
Auburn, IN
Dr. Bruce Burton
MD
Corydon, IN
Compare Geriatric Medicine (Family Medicine) Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Indiana medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Geriatric Medicine (Family Medicine) Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Jack Bartoszek, D.O.'s specialty? ▼
Jack Bartoszek, D.O. specializes in Geriatric Medicine (Family Medicine) Physician and practices in Mishawaka, Indiana. Credentials: D.O..
How much does Jack Bartoszek, D.O. prescribe under Medicare Part D? ▼
In 2023, Jack Bartoszek, D.O. wrote 4,575 Medicare Part D claims totaling $410K in drug costs for 109 beneficiaries.
Where is Jack Bartoszek, D.O. located? ▼
Jack Bartoszek, D.O. is located at 615 FULMER RD, Mishawaka, IN, 46544. Phone: (574) 252-3085.
What is Jack Bartoszek, D.O.'s NPI number? ▼
Jack Bartoszek, D.O.'s National Provider Identifier (NPI) is 1093714818, issued on 07/14/2005.
Does Jack Bartoszek, D.O. prescribe more brand-name or generic drugs? ▼
Jack Bartoszek, D.O.'s prescribing is 13% brand-name and 86% generic drugs by claim count, with $280K in brand drug costs.
Does Jack Bartoszek, D.O. prescribe opioids? ▼
Yes, Jack Bartoszek, D.O. had 51 opioid claims in 2023 with an opioid prescribing rate of 1.1%.
How many Geriatric Medicine (Family Medicine) Physician providers are there in the US? ▼
There are 1,779 Geriatric Medicine (Family Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Family Medicine) Physician provider writes 4,854 Medicare Part D claims per year.
What drugs does Jack Bartoszek, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, Jack Bartoszek, D.O.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jack Bartoszek, D.O. accept Medicare? ▼
Jack Bartoszek, D.O. appears in CMS Medicare data with 4,575 Part D claims and 109 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jack Bartoszek, D.O.'s credentials? ▼
Jack Bartoszek, D.O.'s NPI is 1093714818 with credentials D.O.. 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.
- 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
Compiled from official public sources by the PlainDoctor editorial team.