NPI registry status
Active
2026 NPPES data Surgery Physician NPI 1205128816 MD
Verify on CMS → Mark Weismiller, MD
Surgery Physician in Saint Johns, Michigan.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 36,199 in Surgery 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
179
Medicare Part D claims · 106 beneficiaries · Surgery Physician avg: 169
Generic prescribing
77%
generic claims · 23% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Mark Weismiller, MD filed 179 Medicare Part D claims in 2023 as a Surgery Physician in Saint Johns, Michigan, prescribing 77% generic.
- 179
- Part D claims, 2023
- 77%
- 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.
Mark Weismiller, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
179 35th percentile higher than 35% 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 certification likely (heuristic, not verified)
Mark Weismiller, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Mark Weismiller, MD?
Quality data not reportedPrimary specialty
Surgery Physician
Medicare Part D claims
179 6% vs specialty avg
Specialty distribution in Michigan
How Surgery Physician compares to other specialties among Michigan 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 Surgery 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).
Mark Weismiller, MD appears in the CMS NPPES registry as a Surgery Physician provider holding MD credentials at 901 S OAKLAND ST, Saint Johns, MI, 48879, with a listed phone of (989) 224-2338. NPI 1205128816 was issued on 05/15/2011.
Medicare Part D records for calendar year 2023 show 179 prescription claims written by this provider, covering 106 Medicare beneficiaries and totaling roughly $8K in drug spend, split 23% brand-name and 77% generic by claim count, with an opioid prescribing rate of 29.6%.
Surgery Physician is a mid-sized specialty nationwide, with 36,199 enrolled providers across 56 states and an average of 169 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 | 1205128816 |
|---|---|
| Specialty | Surgery Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 05/15/2011 |
Hospital and facility affiliations
Facilities where Mark Weismiller, 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.
Sparrow Clinton Hospital
St Johns, MI
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Michigan MI-BOM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~41K Michigan medical licensees in 2023 - they are NOT specific to Mark Weismiller, MD. To verify Mark Weismiller, MD's current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases
MI-BOM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Mark Weismiller, MD - brand share 23.0%
Surgery Physician average
23% brand-name claims vs 77% generic, on 179 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.
179
Total Claims
$8K
Total Drug Cost
106
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 220
- Total Day Supply
- 2,823
- Brand vs Generic
- 23% brand / 77% generic
- Brand Drug Cost
- $6K
- Generic Drug Cost
- $2K
- Opioid Claims
- 53 (29.6% rate)
- Antibiotic Claims
- 17
Patient Demographics
- Average Patient Age
- 70.6 years
- Avg HCC Risk Score
- 0.92
- Gender Split
- 44% female / 56% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mark Weismiller, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
42 claims
- Sutab
Sutab
37 claims
- Pantoprazole Sodium
Pantoprazole Sodium
21 claims
- Ondansetron Hcl
Ondansetron Hcl
18 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 42 |
| Sutab Sod Sulf/Pot Chloride/Mag Sulf | 37 |
| Pantoprazole Sodium | 21 |
| Ondansetron Hcl | 18 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Surgery Physician Overview
How Mark Weismiller, MD fits within the Surgery Physician landscape nationally.
36,199
Surgery Physician Providers in US
56
States with Surgery Physician
169
Avg Claims per Provider
Mark Weismiller, MD's 179 claims are above the specialty average of 169.
Nearby Surgery Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Weismiller.
Dr. Emily Abbott
D.O., M.S.
Warren, MI
Dr. Ahmad Abdul Ali
DO
Trenton, MI
Dr. Taylor Abraham
MD
Royal Oak, MI
Dr. Ahmad Abukhader
DO
Wyandotte, MI
Dr. Majd Aburabia
M.D.
Dearborn Heights, MI
Compare Surgery 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 Michigan medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Surgery 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 Mark Weismiller, MD's specialty? ▼
Mark Weismiller, MD specializes in Surgery Physician and practices in Saint Johns, Michigan. Credentials: MD.
How much does Mark Weismiller, MD prescribe under Medicare Part D? ▼
In 2023, Mark Weismiller, MD wrote 179 Medicare Part D claims totaling $8K in drug costs for 106 beneficiaries.
Where is Mark Weismiller, MD located? ▼
Mark Weismiller, MD is located at 901 S OAKLAND ST, Saint Johns, MI, 48879. Phone: (989) 224-2338.
What is Mark Weismiller, MD's NPI number? ▼
Mark Weismiller, MD's National Provider Identifier (NPI) is 1205128816, issued on 05/15/2011.
Does Mark Weismiller, MD prescribe more brand-name or generic drugs? ▼
Mark Weismiller, MD's prescribing is 23% brand-name and 77% generic drugs by claim count, with $6K in brand drug costs.
Does Mark Weismiller, MD prescribe opioids? ▼
Yes, Mark Weismiller, MD had 53 opioid claims in 2023 with an opioid prescribing rate of 29.6%.
How many Surgery Physician providers are there in the US? ▼
There are 36,199 Surgery Physician providers across 56 states in the US. The average Surgery Physician provider writes 169 Medicare Part D claims per year.
What drugs does Mark Weismiller, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mark Weismiller, MD's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Sutab, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Weismiller, MD accept Medicare? ▼
Mark Weismiller, MD appears in CMS Medicare data with 179 Part D claims and 106 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Weismiller, MD's credentials? ▼
Mark Weismiller, MD's NPI is 1205128816 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.
- 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.