Nathan Larsen, M.D.
NPI 1992887848 · Emergency Medicine Physician · Waupaca, WI
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Larsen, M.D. is a Emergency Medicine Physician provider in Waupaca, WI (NPI 1992887848).
Provider details
- NPI number
- 1992887848
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 48825-020 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
4 documented practice locations
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 37 | 37 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 31 | 31 |
| Ondansetronbrand: Ondansetron Odt | 17 | 17 |
| Cephalexin | 16 | 16 |
| Ciprofloxacin Hcl | 14 | 14 |
| Azithromycin | 12 | 12 |
| Doxycycline Monohydrate | 11 | 11 |
Practice location
Mailing address
Additional practice locations (3)
- 225 Memorial DrBerlin, WI 54923-1243Phone: (920) 361-1313Fax: (920) 361-5499
- 1405 Mill StNew London, WI 54961-2155Phone: (920) 531-2000
- 100 County Road BShawano, WI 54166-7072Phone: (715) 526-2111Fax: (715) 526-9166
Registry dates
- Enumerated
- 2006-10-19
- Last updated
- 2022-11-17
- Certified
- 2022-08-03
Frequently asked questions
- What is Nathan Larsen's NPI number?
- Nathan Larsen's National Provider Identifier (NPI) is 1992887848, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Larsen's specialty?
- Nathan Larsen is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nathan Larsen located?
- Nathan Larsen's practice location on file with NPPES is 800 Riverside Dr, Waupaca, WI 54981-1943.
- What is Nathan Larsen's phone number?
- The practice phone number listed in the NPPES registry for Nathan Larsen is (715) 258-1000.
- Does Nathan Larsen accept Medicare?
- Nathan Larsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Larsen's NPI active?
- Yes — Nathan Larsen's NPI (1992887848) is active in the NPPES registry as of the last update on 2022-11-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.