Larissa Olson, PA
NPI 1558839043 · Physician Assistant · Middlebury, VT
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Larissa Olson, PA is a Physician Assistant provider in Middlebury, VT (NPI 1558839043).
Provider details
- NPI number
- 1558839043
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
- License
- PA2421 (ME)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 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
86 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 50 Minutes99233 | 27 | $94 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 24 | $141 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 20 | $106 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 15 | $91 |
Typical Medicare-allowed amounts for these services range $91–$141 (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.
Practice location
Mailing address
Additional practice locations (2)
- 118 Northport AveBelfast, ME 04915-6072Phone: (585) 943-2282
- 16 Hospital RdPlymouth, NH 03264-1199Phone: (603) 536-1120
Registry dates
- Enumerated
- 2018-11-02
- Last updated
- 2024-12-18
- Certified
- 2024-12-18
Frequently asked questions
- What is Larissa Olson's NPI number?
- Larissa Olson's National Provider Identifier (NPI) is 1558839043, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Larissa Olson's specialty?
- Larissa Olson is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Larissa Olson located?
- Larissa Olson's practice location on file with NPPES is 115 Porter Dr, Middlebury, VT 05753-8629.
- What is Larissa Olson's phone number?
- The practice phone number listed in the NPPES registry for Larissa Olson is (802) 388-8842.
- Does Larissa Olson accept Medicare?
- Larissa Olson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Larissa Olson's NPI active?
- Yes — Larissa Olson's NPI (1558839043) is active in the NPPES registry as of the last update on 2024-12-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.