Dr. Mark Weismiller, MD
- Medicare services, 2022
- 27
- Part D claims, 2024
- 217
- Hospital affiliations
- 2
- Industry payments
- $281
- Medical groups
- 10
- Practice address
- 805 S Oakland St, Saint Johns, MI 48879
- Practice phone
- Call (989) 224-6881
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UM Health-Sparrow Clinton Hospital
Saint Johns, Michigan
Find Dr. Weismiller's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark Weismiller is a general surgeon in Saint Johns, Michigan
Dr. Weismiller practices at UM Health-Sparrow Clinton Hospital in Saint Johns, Michigan.
Dr. Weismiller's NPI, 1205128816, was assigned on May 15, 2011. Dr. Weismiller graduated from Wayne State University School of Medicine in 2011. Dr. Weismiller holds Michigan license 4301098816.
- NPI
- 1205128816NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7810287968
- NPI enumeration date
- May 15, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (989) 224-6881
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Weismiller practices at UM Health-Sparrow Clinton Hospital in Saint Johns, Michigan
Dr. Weismiller's primary practice is UM Health-Sparrow Clinton Hospital, at 805 S Oakland St, Saint Johns, MI 48879 in Clinton County. The practice phone is (989) 224-6881.
- UM Health-Sparrow Clinton Hospital805 S Oakland St, Saint Johns, MI 48879 · Clinton CountyPhone(989) 224-6881
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark Weismiller is affiliated with 5 sites of care and 10 medical groups
Dr. Weismiller's primary practice is UM Health-Sparrow Clinton Hospital in Saint Johns, Michigan. Dr. Weismiller is also affiliated with University of Michigan Health-Sparrow Clinton. The medical group on file is Sparrow Ionia Hospital. Dmand AI also links Dr. Weismiller to 1 more hospital, 9 medical groups and 2 group practices and clinics, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark Weismiller's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Weismiller practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UM Health-Sparrow Clinton Hospital | Available with a free account |
| +4 more sites and 9 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark Weismiller is one of 1,095 general surgeons in Michigan
Surgery is Dr. Weismiller's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Weismiller is licensed in Michigan.
Specialties and state licenses
- Surgery, MichiganPrimary
General surgeons near Dr. Weismiller
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark Weismiller billed Medicare for 27 services in 2022
CMS data shows 27 Medicare services from Dr. Weismiller across 2 procedure codes in 2022, all of them office visits. Medicare paid $1,736 for them. Every service was in an office.
Dr. Weismiller's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 1592022: 2783%
- Surgery
- 2021: 162022: 0100%
Dr. Weismiller compared with the Michigan median for general surgeons, 2022
- Dr. Weismiller
- Michigan median
- Medicare services
- 27vs 12679% below
- Part D claims
- 137vs 304.6 times
Medians across 1,046 general surgeons in Michigan with Dmand AI profiles that report each measure.
Dr. Weismiller's most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Weismiller?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Weismiller and other general surgeons in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Weismiller's patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Weismiller's median patient age at 63, with 49% women.
Dr. Weismiller's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women49%
- Men51%
Source: Dmand AI Patient Panel Data
Dr. Mark Weismiller wrote 217 Medicare Part D claims in 2024
In 2024, Dr. Weismiller wrote 217 Medicare Part D claims for 143 patients. 72% of them were for generic drugs. CMS names the drug for 137 of them, across 4 drugs with 11 or more claims each, at $8,576 in total drug cost. In 2023, CMS named 118 claims across 4 drugs.
Dr. Weismiller's Part D claims by kind of drug, 2024
- Generic157 claims72%
- Brand-name60 claims28%
Dr. Weismiller's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Weismiller's Part D claims, 2024
- Opioids27%58 of 217 claims
- Antibiotics8%18 of 217 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1182024: 13716%
Drugs named by CMS: 4 in 2024, 4 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Mark Weismiller takes part in Medicare
Dr. Weismiller accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Mark Weismiller received $281 in industry payments from 2018 to 2025
CMS Open Payments shows 9 general payments to Dr. Weismiller from 9 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 100% of the total. Innovation Technologies Inc paid the most, $91.
General payments to Dr. Weismiller by program year, 2018 to 2025
Companies that paid Dr. Weismiller the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark Weismiller graduated from Wayne State University School of Medicine
Dr. Weismiller graduated from Wayne State University School of Medicine in 2011.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Weismiller's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Mark Weismiller
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mark Weismiller's NPI number?
Dr. Mark Weismiller's NPI number is 1205128816. It was assigned on May 15, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Weismiller?
Dr. Mark Weismiller is a general surgeon in Saint Johns, Michigan. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Mark Weismiller practice?
Dr. Weismiller practices at 805 S Oakland St, Saint Johns, MI 48879. Dr. Weismiller's primary practice is UM Health-Sparrow Clinton Hospital in Saint Johns, Michigan. Dmand AI also links Dr. Weismiller to 1 hospital, 9 medical groups and 2 group practices and clinics.
What is Dr. Mark Weismiller's office phone number?
The practice phone on file for Dr. Weismiller is (989) 224-6881.
What is Dr. Mark Weismiller's medical license number?
Dr. Weismiller holds Michigan license 4301098816.
Which hospitals is Dr. Mark Weismiller affiliated with?
Dr. Weismiller is affiliated with University of Michigan Health-Sparrow Clinton. Dmand AI links Dr. Weismiller to 1 more hospital.
What medical group is Dr. Mark Weismiller part of?
Dr. Weismiller is linked to Sparrow Ionia Hospital. Dmand AI links Dr. Weismiller to 9 more medical groups.
Does Dr. Mark Weismiller accept Medicare?
Yes. CMS data shows Dr. Weismiller billed Medicare for 27 services in 2022, and Dr. Weismiller accepts Medicare assignment.
What services does Dr. Mark Weismiller bill to Medicare?
In 2022, Dr. Weismiller's most billed Medicare services were office visit, new patient (99203) and office visit, new patient (99204).
Where did Dr. Mark Weismiller go to medical school?
Dr. Weismiller graduated from Wayne State University School of Medicine in 2011.
Show 3 more questionsShow fewer questions
What drugs does Dr. Mark Weismiller prescribe most?
In 2024 Medicare Part D data, Dr. Weismiller's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Sutab and Ondansetron HCl.
Has Dr. Mark Weismiller received payments from drug or device companies?
CMS Open Payments shows $281 in general payments to Dr. Weismiller from 9 companies from 2018 to 2025. The largest total came from Innovation Technologies Inc.
How long has Dr. Mark Weismiller been practicing?
Dr. Weismiller graduated from medical school in 2011, 15 years ago.
Selling to surgery practices?
See general surgeons in Michigan by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card