Marisa Olsommer, PA-C
NPI 1285813931 · Medical Physician Assistant · Bartonsville, PA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marisa Olsommer, PA-C is a Medical Physician Assistant provider in Bartonsville, PA (NPI 1285813931).
Provider details
- NPI number
- 1285813931
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- MA053255 (PA)
Specialties & taxonomies
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
18 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
353 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 315 | $75 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 38 | $91 |
Typical Medicare-allowed amounts for these services range $75–$91 (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 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 547 | 175 |
| Omeprazole | 278 | 82 |
| Famotidine | 272 | 77 |
| Dicyclomine Hcl | 181 | 70 |
| Esomeprazole Magnesium | 114 | 33 |
| Metoclopramide Hcl | 99 | 37 |
| Linaclotidebrand: Linzess | 90 | 26 |
| Colestipol Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-10-30
- Last updated
- 2025-09-18
- Certified
- 2025-09-18
Frequently asked questions
- What is Marisa Olsommer's NPI number?
- Marisa Olsommer's National Provider Identifier (NPI) is 1285813931, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marisa Olsommer's specialty?
- Marisa Olsommer is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marisa Olsommer located?
- Marisa Olsommer's practice location on file with NPPES is 3565 Route 611 Ste 300, Bartonsville, PA 18321-7800.
- What is Marisa Olsommer's phone number?
- The practice phone number listed in the NPPES registry for Marisa Olsommer is (484) 526-6545.
- Does Marisa Olsommer accept Medicare?
- Marisa Olsommer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marisa Olsommer's NPI active?
- Yes — Marisa Olsommer's NPI (1285813931) is active in the NPPES registry as of the last update on 2025-09-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.