Larissa Halvorson, APRN, CNP
NPI 1861193930 · Nurse Practitioner · Mankato, MN
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Larissa Halvorson, APRN, CNP is a Nurse Practitioner provider in Mankato, MN (NPI 1861193930).
Provider details
- NPI number
- 1861193930
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN, CNP
- Sex
- Female
- Sole proprietor
- No
- License
- 2330422 (MN)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
3 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
372 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 103 | $53 |
| Exam of Ear Using a Microscope92504 | 96 | $7 |
| Diagnostic Exam of Voice Box Using a Flexible Endoscope31575 | 70 | $55 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 44 | $78 |
| Removal of Impacted Ear Wax69210 | 35 | $25 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 24 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone Propionate | 49 | 18 |
| Omeprazole | 28 | — |
| Ciprofloxacin Hcl | 24 | 18 |
| Famotidine | 24 | — |
| Mometasone Furoate | 24 | 12 |
| Pantoprazole Sodium | 23 | 12 |
| Azelastine Hcl | 22 | 13 |
| Ipratropium Bromide |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$76 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-03-15
- Last updated
- 2024-09-06
- Certified
- 2024-09-06
Frequently asked questions
- What is Larissa Halvorson's NPI number?
- Larissa Halvorson's National Provider Identifier (NPI) is 1861193930, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Larissa Halvorson's specialty?
- Larissa Halvorson is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Larissa Halvorson located?
- Larissa Halvorson's practice location on file with NPPES is 1025 Marsh St, Mankato, MN 56001-4752.
- What is Larissa Halvorson's phone number?
- The practice phone number listed in the NPPES registry for Larissa Halvorson is (507) 625-4031.
- Does Larissa Halvorson accept Medicare?
- Larissa Halvorson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Larissa Halvorson's NPI active?
- Yes — Larissa Halvorson's NPI (1861193930) is active in the NPPES registry as of the last update on 2024-09-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.