Dr. Bryan Hartland Lassner, MD
- Medicare services, 2024
- 269
- Medicare patients, 2024
- 212
- Part D claims, 2024
- 226
- Hospital affiliations
- 1
- Industry payments
- $21
- Practice address
- 707 S University Ave, Beaver Dam, WI 53916
- Practice phone
- Call (920) 887-7181
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Lassner'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. Bryan Hartland Lassner is an emergency medicine physician in Beaver Dam, Wisconsin
Dr. Lassner practices at Marshfield Medical Center - Beaver Dam in Beaver Dam, Wisconsin, part of Sanford Health.
Dr. Lassner's NPI, 1871859884, was assigned on April 3, 2012. Dr. Lassner holds Illinois license 336098920.
- NPI
- 1871859884NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4385887769
- NPI enumeration date
- April 3, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (920) 887-7181
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Bryan Hartland Lassner practices at Marshfield Medical Center - Beaver Dam in Beaver Dam, Wisconsin
Dr. Lassner's primary practice is Marshfield Medical Center - Beaver Dam, at 707 S University Ave, Beaver Dam, WI 53916 in Dodge County. The practice phone is (920) 887-7181.
- Marshfield Medical Center - Beaver Dam707 S University Ave, Beaver Dam, WI 53916 · Dodge CountyPhone(920) 887-7181
Source: Dmand AI Affiliation Data
Dr. Bryan Hartland Lassner is affiliated with 2 sites of care and 2 medical groups
Dr. Lassner's primary practice is Marshfield Medical Center - Beaver Dam in Beaver Dam, Wisconsin, part of Sanford Health. The medical group on file is Marshfield Medical Center-Beaver Dam. Dmand AI also links Dr. Lassner to 1 more clinical lab 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. Bryan Hartland Lassner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lassner practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Marshfield Medical Center - Beaver Dam | 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 Sanford Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Bryan Hartland Lassner is one of 1,211 emergency medicine physicians in Wisconsin
Emergency medicine is Dr. Lassner's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Lassner is licensed in Illinois.
Specialties and state licenses
- Emergency medicine, IllinoisPrimary
Emergency medicine physicians near Dr. Lassner
Counts of emergency medicine physicians 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. Bryan Hartland Lassner billed Medicare for 269 services in 2024
CMS data shows 269 Medicare services from Dr. Lassner across 4 procedure codes in 2024, for 212 Medicare patients. Medicare paid $20,784 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Lassner's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2572024: 20421%
- Tests and treatments
- 2023: 932024: 6530%
Dr. Lassner compared with the Wisconsin median for emergency medicine physicians, 2024
- Dr. Lassner
- Wisconsin median
- Medicare services
- 269vs 2469% above
- Medicare patients
- 212vs 221Close to median
- Part D claims
- 98vs 5772% above
Medians across 1,249 emergency medicine physicians in Wisconsin with Dmand AI profiles that report each measure.
Dr. Lassner's most billed Medicare procedure codes, 2024
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. Lassner?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Lassner and other emergency medicine physicians in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Bryan Hartland Lassner treated 212 Medicare patients in 2024, average age 72
CMS counts 212 Medicare patients who saw Dr. Lassner in 2024. The largest group is 65 to 74, with 68 patients. 73% of them have high blood pressure, and 70% have high cholesterol. 34% are also on Medicaid. Their average risk score is 1.63, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Lassner's median patient age at 46, with 57% women.
Dr. Lassner's Medicare patients by age, 2024
Dr. Lassner's Medicare patients by sex, 2024
- Women10851%
- Men10449%
Chronic conditions among Dr. Lassner's Medicare patients, 2024
- High blood pressure73%
- High cholesterol70%
- Anxiety42%
- Chronic kidney disease42%
- Mood disorders42%
- Arthritis41%
- Depression37%
- Ischemic heart disease34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lassner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 46
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Bryan Hartland Lassner wrote 226 Medicare Part D claims in 2024
In 2024, Dr. Lassner wrote 226 Medicare Part D claims for 163 patients. 92% of them were for generic drugs. CMS names the drug for 98 of them, across 6 drugs with 11 or more claims each, at $554 in total drug cost. In 2023, CMS named 89 claims across 4 drugs.
Dr. Lassner's Part D claims by kind of drug, 2024
- Generic208 claims92%
- Brand-name18 claims8%
Dr. Lassner'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. Lassner's Part D claims, 2024
- Opioids9%21 of 226 claims
- Antibiotics35%80 of 226 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: 892024: 9810%
Drugs named by CMS: 6 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. Bryan Hartland Lassner takes part in Medicare
Dr. Lassner accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (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. Bryan Hartland Lassner received $21 in industry payments in 2021
CMS Open Payments shows 1 general payment to Dr. Lassner from 1 drug or device company in 2021. Food and beverage make up the largest share, 100% of the total. Vapotherm Inc paid the most, $21.
Companies that paid Dr. Lassner the most, 2021 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Bryan Hartland Lassner'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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Bryan Hartland Lassner
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. Bryan Hartland Lassner's NPI number?
Dr. Bryan Hartland Lassner's NPI number is 1871859884. It was assigned on April 3, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Bryan Hartland Lassner?
Dr. Bryan Hartland Lassner is an emergency medicine physician in Beaver Dam, Wisconsin. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Bryan Hartland Lassner practice?
Dr. Lassner practices at 707 S University Ave, Beaver Dam, WI 53916. Dr. Lassner's primary practice is Marshfield Medical Center - Beaver Dam in Beaver Dam, Wisconsin, part of Sanford Health. Dmand AI also links Dr. Lassner to 1 clinical lab and 1 medical group.
What is Dr. Bryan Hartland Lassner's office phone number?
The practice phone on file for Dr. Lassner is (920) 887-7181.
What is Dr. Bryan Hartland Lassner's medical license number?
Dr. Lassner holds Illinois license 336098920.
Which hospitals is Dr. Bryan Hartland Lassner affiliated with?
Dr. Lassner practices at Marshfield Medical Center - Beaver Dam in Beaver Dam, Wisconsin.
What medical group is Dr. Bryan Hartland Lassner part of?
Dr. Lassner is linked to Marshfield Medical Center-Beaver Dam. Dmand AI links Dr. Lassner to 1 more medical group.
Does Dr. Bryan Hartland Lassner accept Medicare?
Yes. CMS data shows Dr. Lassner billed Medicare for 269 services in 2024, and Dr. Lassner accepts Medicare assignment.
How many Medicare patients does Dr. Bryan Hartland Lassner see?
CMS counts 212 Medicare patients who saw Dr. Lassner in 2024, with an average age of 72.
What services does Dr. Bryan Hartland Lassner bill to Medicare?
In 2024, Dr. Lassner's most billed Medicare services were emergency department visit (99285), heart test or procedure (93010) and emergency department visit (99284).
Show 3 more questionsShow fewer questions
What drugs does Dr. Bryan Hartland Lassner prescribe most?
In 2024 Medicare Part D data, Dr. Lassner's most prescribed drugs by claims were Cephalexin, Prednisone and Ondansetron ODT.
Has Dr. Bryan Hartland Lassner received payments from drug or device companies?
CMS Open Payments shows $21 in general payments to Dr. Lassner from 1 company from 2021 to 2021. The largest total came from Vapotherm Inc.
How long has Dr. Bryan Hartland Lassner been practicing?
Dr. Lassner graduated from medical school in 2012, 14 years ago.
Selling to emergency medicine practices?
See emergency medicine physicians in Wisconsin 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