Bryan Lassner, M.D.
NPI 1871859884 · Emergency Medicine Physician · Beaver Dam, WI
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Bryan Lassner, M.D. is a Emergency Medicine Physician provider in Beaver Dam, WI (NPI 1871859884).
Provider details
- NPI number
- 1871859884
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 336098920 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
269 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 123 | $160 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 65 | $8 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 61 | $111 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 20 | $91 |
Typical Medicare-allowed amounts for these services range $8–$160 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 26 | 25 |
| Prednisone | 19 | 19 |
| Ondansetronbrand: Ondansetron Odt | 15 | 15 |
| Azithromycin | 14 | 14 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 13 | 13 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 11 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (2)
- 701 W North AveMelrose Park, IL 60160-1699Phone: (708) 538-4975
- 2500 Metrohealth DrCleveland, OH 44109-1900Phone: (216) 778-7800
Registry dates
- Enumerated
- 2012-04-03
- Last updated
- 2025-07-03
- Certified
- 2025-07-03
Frequently asked questions
- What is Bryan Lassner's NPI number?
- Bryan Lassner's National Provider Identifier (NPI) is 1871859884, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Bryan Lassner's specialty?
- Bryan Lassner is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Bryan Lassner located?
- Bryan Lassner's practice location on file with NPPES is 707 S University Ave, Beaver Dam, WI 53916-3027.
- What is Bryan Lassner's phone number?
- The practice phone number listed in the NPPES registry for Bryan Lassner is (920) 887-6606.
- Does Bryan Lassner accept Medicare?
- Bryan Lassner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Bryan Lassner's NPI active?
- Yes — Bryan Lassner's NPI (1871859884) is active in the NPPES registry as of the last update on 2025-07-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.