NPPES file of Aug 9, 2026

Bryan Hartland Lassner, M.D.

Emergency Medicine Physician · Beaver Dam, WI

Bryan Hartland Lassner, M.D. is an emergency medicine physician with a practice address in Beaver Dam, Wisconsin, and NPI 1871859884, issued on Apr 3, 2012. Check the license (Wisconsin 75454-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1871859884
Name
Bryan Hartland Lassner
Credential
M.D.
Primary taxonomy
Emergency Medicine Physician 207P00000X
License numbers
75454-20 WI
336098920 IL
Self-reported in NPPES; status is on the state search
Practice location
707 S University Ave, Beaver Dam, WI 53916
Phone
(920) 887-6606
Enumerated
Apr 3, 2012
Record last updated
Jul 3, 2025
Medicare enrollment
Enrolled (PECOS I20210807000233); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest emergency medicine physician records → All 1,464 in Wisconsin → Look up another NPI →

Also registered at 707 S University Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Omar Abdelmegid, MDOphthalmology Physician1760943633
  2. Mesfin Abera, M.D.Internal Medicine Physician1972852390
  3. Laeekha Ali, MDAnatomic Pathology & Clinical Pathology Physician1245200427
  4. Callie AulikPhysical Therapist1528851748
  5. Michelle Bartzen, PA-CPhysician Assistant1568027555
  6. Susan Baumann, OTROccupational Therapist1750642583

Verify Bryan Hartland Lassner in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWisconsin Medical Examining Board
    Search for license 75454-20    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Wisconsin license search

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About as many Medicare Part D claims as the average emergency medicine physician in 2024

226 Medicare Part D claims for 163 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 21 claims were for opioids.

  1. Bryan Lassner226
  2. Specialty average226

Most prescribed

  1. Cephalexin26 claims
  2. Prednisone19 claims
  3. Ondansetron Odt15 claims
  4. Azithromycin14 claims
  5. Hydrocodone-Acetaminophen13 claims
  6. Amoxicillin-Clavulanate Potass11 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Bills Medicare through one group practice

  1. Ihc Beaver Dam Emergency Physicians, LLCBeaver Dam, WI

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Bryan Hartland Lassner among 1,464 emergency medicine physician records in Wisconsin

Bryan Hartland Lassner, M.D. is one of 1,464 emergency medicine physician records with a practice address in Wisconsin. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 62% of them.

  • NPI issued2012 · 62% of these records are older, 36% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 58% of these records are
  • Graduated2012 · median 2011 among the 844 with a school on file
  • Record last updated2025 · 50% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

6 emergency medicine physician records list a practice address in Beaver Dam

They are 6 of the 412 NPPES records with a practice address in Beaver Dam, and 1,464 emergency medicine physician records in Wisconsin.

All 1,464 in Wisconsin → Every provider in Beaver Dam → Emergency Medicine Physician nationwide →

The 8 emergency medicine physician records with the nearest ZIP codes

  1. Laura Correa, D.O.Beaver Dam, WI 539161578702601
  2. Eric Kotal, MDBeaver Dam, WI 539161194036368
  3. Jeffrey Lovell, M.D.Beaver Dam, WI 539161801877063
  4. Tonya Neumann, M.D.Beaver Dam, WI 539161477993137
  5. Richard Tovar, M.D.Beaver Dam, WI 539161437187341
  6. Timothy May, MDBaraboo, WI 539131952380362
  7. Hythem Abad, DOPortage, WI 539011548799455
  8. Charles Boursier, MDPortage, WI 539011619950888

Common questions

What is Bryan Hartland Lassner, M.D.'s NPI number?

Bryan Hartland Lassner, M.D.'s National Provider Identifier (NPI) is 1871859884, issued on Apr 3, 2012. An NPI identifies a provider in billing; it is not a license.

Where is Bryan Hartland Lassner, M.D. located?

The NPPES record lists a practice address at 707 S University Ave, Beaver Dam, WI, 53916. Phone: (920) 887-6606. Providers update this record themselves, so call before visiting.

How can I verify Bryan Hartland Lassner, M.D.'s license?

NPPES lists Wisconsin license number 75454-20, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Bryan Hartland Lassner, M.D. prescribe under Medicare Part D?

In 2024, Bryan Hartland Lassner, M.D. had 226 Medicare Part D claims for 163 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.