Olivia Slezik, NP
NPI 1891378733 · Primary Care Nurse Practitioner · Worcester, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Olivia Slezik, NP is a Primary Care Nurse Practitioner provider in Worcester, MA (NPI 1891378733).
Provider details
- NPI number
- 1891378733
- Entity type
- Individual
- Primary specialty
- Primary Care Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- RN2327857 (MA)
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
5 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
1,381 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 208 | $83 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 202 | $72 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 174 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 86 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test85027 | 68 | $6 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 54 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 35 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 50 | 21 |
| Prednisone | 46 | 38 |
| Amlodipine Besylate | 46 | 19 |
| Citalopram Hydrobromidebrand: Citalopram Hbr | 43 | 17 |
| Lorazepam | 40 | 23 |
| Doxycycline Monohydrate | 36 | 33 |
| Rosuvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-04-29
- Last updated
- 2021-04-29
- Certified
- 2021-04-29
Frequently asked questions
- What is Olivia Slezik's NPI number?
- Olivia Slezik's National Provider Identifier (NPI) is 1891378733, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Olivia Slezik's specialty?
- Olivia Slezik is listed in the NPPES registry with a primary specialty of Primary Care Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Olivia Slezik located?
- Olivia Slezik's practice location on file with NPPES is 486 Chandler St, Worcester, MA 01602-2861.
- What is Olivia Slezik's phone number?
- The practice phone number listed in the NPPES registry for Olivia Slezik is (508) 929-8875.
- Does Olivia Slezik accept Medicare?
- Olivia Slezik is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Olivia Slezik's NPI active?
- Yes — Olivia Slezik's NPI (1891378733) is active in the NPPES registry as of the last update on 2021-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.