Dr. William V. Zemnickas II, DO
- Medicare services, 2023
- 35
- Part D claims, 2024
- 28
- Hospital affiliations
- 1
- Industry payments
- $37
- Medical groups
- 5
- Practice address
- 2770 Main Street, Marlette, MI 48453
- Practice phone
- Call (989) 635-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Zemnickas' 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. William V. Zemnickas II is a general surgeon in Marlette, Michigan
Dr. Zemnickas practices at Marlette Regional Hospital in Marlette, Michigan, part of Aspire Rural Health System.
Dr. Zemnickas' NPI, 1568553667, was assigned on September 27, 2006. Dr. Zemnickas graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 1976. Dr. Zemnickas holds Michigan license WZ007094.
- NPI
- 1568553667NPI Registry (opens in a new tab)
- NPI enumeration date
- September 27, 2006
- NPI status
- Active
- Practice phone
- (989) 635-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 76
- Medical school graduation
- 1976
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William V. Zemnickas II practices at Marlette Regional Hospital in Marlette, Michigan
Dr. Zemnickas' primary practice is Marlette Regional Hospital, at 2770 Main Street, Marlette, MI 48453 in Sanilac County. The practice phone is (989) 635-4000.
- Marlette Regional Hospital2770 Main Street, Marlette, MI 48453 · Sanilac CountyPhone(989) 635-4000
Source: Dmand AI Affiliation Data
Dr. William V. Zemnickas II is affiliated with 3 sites of care and 5 medical groups
Dr. Zemnickas' primary practice is Marlette Regional Hospital in Marlette, Michigan, part of Aspire Rural Health System. The medical group on file is Marlette Regional Hospital. Dmand AI also links Dr. Zemnickas to 4 more medical groups and 2 group practices and clinics, each named with a free account. Dr. Zemnickas' employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William V. Zemnickas II's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zemnickas practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Marlette Regional Hospital | Available with a free account |
| +2 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William V. Zemnickas II is one of 1,095 general surgeons in Michigan
Surgery is Dr. Zemnickas' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Zemnickas is licensed in Michigan.
Specialties and state licenses
- Surgery, MichiganPrimary
General surgeons near Dr. Zemnickas
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. William V. Zemnickas II billed Medicare for 35 services in 2023
CMS data shows 35 Medicare services from Dr. Zemnickas across 2 procedure codes in 2023. Medicare paid $5,630 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Zemnickas' Medicare services by type, 2022 to 2023
- 2022
- 2023
- Surgery
- 2022: 292023: 2128%
- Other services
- 2022: 112023: 1427%
Dr. Zemnickas compared with the Michigan median for general surgeons, 2023
- Dr. Zemnickas
- Michigan median
- Medicare services
- 35vs 12672% below
- Part D claims
- 18vs 3040% below
Medians across 1,046 general surgeons in Michigan with Dmand AI profiles that report each measure.
Dr. Zemnickas' most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zemnickas and other general surgeons in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William V. Zemnickas II's patients have a median age of 66
Across all payers, Dmand AI patient panel data puts Dr. Zemnickas' median patient age at 66, with 54% women.
Dr. Zemnickas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women54%
- Men46%
Source: Dmand AI Patient Panel Data
Dr. William V. Zemnickas II wrote 28 Medicare Part D claims in 2024
In 2024, Dr. Zemnickas wrote 28 Medicare Part D claims for 27 patients. 68% of them were for generic drugs. CMS names the drug for 18 of them, across 1 drug with 11 or more claims each, at $62 in total drug cost. In 2019, CMS named 25 claims across 1 drug.
Dr. Zemnickas' Part D claims by kind of drug, 2024
- Generic19 claims68%
- Brand-name and other9 claims32%
Dr. Zemnickas' most prescribed drugs by claims, 2022
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. Zemnickas' Part D claims, 2024
- Opioids39%11 of 28 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, 2019 to 2022
- 2019
- 2022
- Claims for drugs CMS names
- 2019: 252022: 1828%
Drugs named by CMS: 1 in 2022, 1 in 2019.
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
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Dr. William V. Zemnickas II received $37 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Zemnickas from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $37.
Companies that paid Dr. Zemnickas the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William V. Zemnickas II graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville
Dr. Zemnickas graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 1976.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William V. Zemnickas II'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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) |
| 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. William V. Zemnickas II
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. William V. Zemnickas II's NPI number?
Dr. William V. Zemnickas II's NPI number is 1568553667. It was assigned on September 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William V. Zemnickas II?
Dr. William V. Zemnickas II is a general surgeon in Marlette, Michigan. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. William V. Zemnickas II practice?
Dr. Zemnickas practices at 2770 Main Street, Marlette, MI 48453. Dr. Zemnickas' primary practice is Marlette Regional Hospital in Marlette, Michigan, part of Aspire Rural Health System. Dmand AI also links Dr. Zemnickas to 4 medical groups and 2 group practices and clinics.
What is Dr. William V. Zemnickas II's office phone number?
The practice phone on file for Dr. Zemnickas is (989) 635-4000.
What is Dr. William V. Zemnickas II's medical license number?
Dr. Zemnickas holds Michigan license WZ007094.
Which hospitals is Dr. William V. Zemnickas II affiliated with?
Dr. Zemnickas practices at Marlette Regional Hospital in Marlette, Michigan.
What medical group is Dr. William V. Zemnickas II part of?
Dr. Zemnickas is linked to Marlette Regional Hospital. Dmand AI links Dr. Zemnickas to 4 more medical groups.
Does Dr. William V. Zemnickas II accept Medicare?
Yes. CMS data shows Dr. Zemnickas billed Medicare for 35 services in 2023.
What services does Dr. William V. Zemnickas II bill to Medicare?
In 2023, Dr. Zemnickas' most billed Medicare services were surgery: digestive system (45380) and medicare service (G0121).
Where did Dr. William V. Zemnickas II go to medical school?
Dr. Zemnickas graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 1976.
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What drugs does Dr. William V. Zemnickas II prescribe most?
In 2022 Medicare Part D data, Dr. Zemnickas' most prescribed drugs by claims were Hydrocodone-Acetaminophen.
Has Dr. William V. Zemnickas II received payments from drug or device companies?
CMS Open Payments shows $37 in general payments to Dr. Zemnickas from 1 company from 2016 to 2016. The largest total came from Novo Nordisk Inc.
How long has Dr. William V. Zemnickas II been practicing?
Dr. Zemnickas graduated from medical school in 1976, 50 years ago.
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