Dr. Stephen J. Merfeld, MD
- Medicare services, 2022
- 1,124
- Part D claims, 2023
- 235
- Hospital affiliations
- 1
- Industry payments
- $467
- Medical group
- 1
- Practice address
- 130 2nd St, Neenah, WI 54956
- Practice phone
- Call (920) 729-3100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Merfeld's professional email, personal email and mobile number
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Dr. Stephen J. Merfeld is an ophthalmologist in Neenah, Wisconsin
Dr. Merfeld practices at ThedaCare Regional Medical Center-Neenah in Neenah, Wisconsin, part of Froedtert ThedaCare Health.
Dr. Merfeld's NPI, 1619957230, was assigned on January 19, 2006. Dr. Merfeld graduated from University of Iowa, RJ & L Carver College of Medicine in 1986. Dr. Merfeld holds Wisconsin license 34248.
- NPI
- 1619957230NPI Registry (opens in a new tab)
- NPI enumeration date
- January 19, 2006
- NPI status
- Active
- Practice phone
- (920) 729-3100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Stephen J. Merfeld practices at ThedaCare Regional Medical Center-Neenah in Neenah, Wisconsin
Dr. Merfeld's primary practice is ThedaCare Regional Medical Center-Neenah, at 130 2nd St, Neenah, WI 54956 in Winnebago County. The practice phone is (920) 729-3100.
- ThedaCare Regional Medical Center-Neenah130 2nd St, Neenah, WI 54956 · Winnebago CountyPhone(920) 729-3100
Source: Dmand AI Affiliation Data
Dr. Stephen J. Merfeld is affiliated with 2 sites of care and 1 medical group
Dr. Merfeld's primary practice is ThedaCare Regional Medical Center-Neenah in Neenah, Wisconsin, part of Froedtert ThedaCare Health. Dmand AI also links Dr. Merfeld to 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stephen J. Merfeld's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Merfeld practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| ThedaCare Regional Medical Center-Neenah | Available with a free account |
| +1 more site and 1 medical group | 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 Froedtert ThedaCare Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Stephen J. Merfeld is one of 328 ophthalmologists in Wisconsin
Ophthalmology is Dr. Merfeld's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Merfeld is licensed in Wisconsin.
Specialties and state licenses
- Ophthalmology, WisconsinPrimary
Ophthalmologists near Dr. Merfeld
Counts of ophthalmologists 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. Stephen J. Merfeld billed Medicare for 1,124 services in 2022
CMS data shows 1,124 Medicare services from Dr. Merfeld across 14 procedure codes in 2022. Medicare paid $120,275 for them.
Dr. Merfeld's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 4812022: 4379%
- Surgery
- 2021: 3472022: 30811%
- Tests and treatments
- 2021: 3522022: 29716%
- Imaging
- 2021: 1052022: 8222%
- Drugs given in the office
- 2021: 1722022: 0100%
Where Dr. Merfeld's Medicare services took place, 2022
- In an office97787%
- In a facility14713%
Dr. Merfeld compared with the Wisconsin median for ophthalmologists, 2022
- Dr. Merfeld
- Wisconsin median
- Medicare services
- 1,124vs 1,162Close to median
- Part D claims
- 235vs 61562% below
Medians across 346 ophthalmologists in Wisconsin with Dmand AI profiles that report each measure.
Dr. Merfeld'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. Merfeld?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Merfeld and other ophthalmologists in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen J. Merfeld's patients have a median age of 79
Across all payers, Dmand AI patient panel data puts Dr. Merfeld's median patient age at 79, with 60% women.
Dr. Merfeld's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 79
Patient panel by sex, all payers
- Women60%
- Men40%
Source: Dmand AI Patient Panel Data
Dr. Stephen J. Merfeld wrote 235 Medicare Part D claims in 2023
In 2023, Dr. Merfeld wrote 235 Medicare Part D claims. They cover 5 drugs, with $14,117 in total drug cost. In 2022, CMS named 1,164 claims across 13 drugs.
Dr. Merfeld's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 1,1642023: 23580%
Drugs named by CMS: 5 in 2023, 13 in 2022.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Stephen J. Merfeld received $467 in industry payments from 2016 to 2025
CMS Open Payments shows 25 general payments to Dr. Merfeld from 11 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $217.
General payments to Dr. Merfeld by program year, 2016 to 2025
Companies that paid Dr. Merfeld the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stephen J. Merfeld graduated from University of Iowa, RJ & L Carver College of Medicine
Dr. Merfeld graduated from University of Iowa, RJ & L Carver College of Medicine in 1986.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stephen J. Merfeld'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) |
| 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. Stephen J. Merfeld
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. Stephen J. Merfeld's NPI number?
Dr. Stephen J. Merfeld's NPI number is 1619957230. It was assigned on January 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen J. Merfeld?
Dr. Stephen J. Merfeld is an ophthalmologist in Neenah, Wisconsin. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Stephen J. Merfeld practice?
Dr. Merfeld practices at 130 2nd St, Neenah, WI 54956. Dr. Merfeld's primary practice is ThedaCare Regional Medical Center-Neenah in Neenah, Wisconsin, part of Froedtert ThedaCare Health. Dmand AI also links Dr. Merfeld to 1 group practice or clinic and 1 medical group.
What is Dr. Stephen J. Merfeld's office phone number?
The practice phone on file for Dr. Merfeld is (920) 729-3100.
What is Dr. Stephen J. Merfeld's medical license number?
Dr. Merfeld holds Wisconsin license 34248.
Which hospitals is Dr. Stephen J. Merfeld affiliated with?
Dr. Merfeld practices at ThedaCare Regional Medical Center-Neenah in Neenah, Wisconsin.
Does Dr. Stephen J. Merfeld accept Medicare?
Yes. CMS data shows Dr. Merfeld billed Medicare for 1,124 services in 2022.
What services does Dr. Stephen J. Merfeld bill to Medicare?
In 2022, Dr. Merfeld's most billed Medicare services were surgery: eye (66984), eye exam or test (92134) and office visit, new patient (99204).
Where did Dr. Stephen J. Merfeld go to medical school?
Dr. Merfeld graduated from University of Iowa, RJ & L Carver College of Medicine in 1986.
What drugs does Dr. Stephen J. Merfeld prescribe most?
In 2023 Medicare Part D data, Dr. Merfeld's most prescribed drugs by claims were Latanoprost, Dorzolamide-Timolol and Brimonidine Tartrate.
Has Dr. Stephen J. Merfeld received payments from drug or device companies?
CMS Open Payments shows $467 in general payments to Dr. Merfeld from 11 companies from 2016 to 2025. The largest total came from Allergan Inc.
How long has Dr. Stephen J. Merfeld been practicing?
Dr. Merfeld graduated from medical school in 1986, 40 years ago.
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