Katherine Larson, MD
NPI 1417393661 · Internal Medicine Physician · Prairie Du Sac, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Larson, MD is a Internal Medicine Physician provider in Prairie Du Sac, WI (NPI 1417393661).
Provider details
- NPI number
- 1417393661
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 65486 (MN)
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
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
431 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 157 | $74 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 99 | $109 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 76 | $112 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 75 | $159 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 24 | $123 |
Typical Medicare-allowed amounts for these services range $74–$159 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 53 | 12 |
| Cefdinir | 28 | 27 |
| Lisinopril | 28 | 11 |
| Prednisone | 26 | 26 |
| Furosemide | 25 | 16 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 23 | 22 |
| Levothyroxine Sodium | 23 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-05-15
- Last updated
- 2021-03-24
- Certified
- 2021-03-24
Frequently asked questions
- What is Katherine Larson's NPI number?
- Katherine Larson's National Provider Identifier (NPI) is 1417393661, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Larson's specialty?
- Katherine Larson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Larson located?
- Katherine Larson's practice location on file with NPPES is 260 26th St, Prairie Du Sac, WI 53578-2203.
- What is Katherine Larson's phone number?
- The practice phone number listed in the NPPES registry for Katherine Larson is (608) 643-3311.
- Does Katherine Larson accept Medicare?
- Katherine Larson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Larson's NPI active?
- Yes — Katherine Larson's NPI (1417393661) is active in the NPPES registry as of the last update on 2021-03-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.