Alexandria Tarvainis, DNP, FNP-BC
NPI 1447939822 · Nurse Practitioner · Oak Brook, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexandria Tarvainis, DNP, FNP-BC is a Nurse Practitioner provider in Oak Brook, IL (NPI 1447939822).
Provider details
- NPI number
- 1447939822
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- DNP, FNP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- 209024538 (IL)
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 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
403 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 157 | $106 |
| Vitamin D-3 Level82306 | 35 | $28 |
| Cyanocobalamin (vitamin B-12) Level82607 | 35 | $14 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 33 | $9 |
| Blood Test, Basic Group of Blood Chemicals (calcium, Total)80048 | 33 | $8 |
| Insulin Measurement, Total83525 | 29 | $11 |
| Injection of Drug Or Substance Under Skin Or Into Muscle |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metformin Hclbrand: Metformin Hcl Er | 146 | 47 |
| Tirzepatidebrand: Mounjaro | 82 | 16 |
| Topiramate | 49 | 23 |
| Semaglutidebrand: Ozempic | 32 | 13 |
| Ondansetronbrand: Ondansetron Odt | 19 | 14 |
| Semaglutidebrand: Wegovy | 17 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$4,754 across 178 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
- 2023-07-13
- Last updated
- 2023-10-06
- Certified
- 2023-07-13
Frequently asked questions
- What is Alexandria Tarvainis's NPI number?
- Alexandria Tarvainis's National Provider Identifier (NPI) is 1447939822, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexandria Tarvainis's specialty?
- Alexandria Tarvainis is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Alexandria Tarvainis located?
- Alexandria Tarvainis's practice location on file with NPPES is 3011 Butterfield Rd Ste 240, Oak Brook, IL 60523-3132.
- What is Alexandria Tarvainis's phone number?
- The practice phone number listed in the NPPES registry for Alexandria Tarvainis is (630) 348-3840.
- Does Alexandria Tarvainis accept Medicare?
- Alexandria Tarvainis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexandria Tarvainis's NPI active?
- Yes — Alexandria Tarvainis's NPI (1447939822) is active in the NPPES registry as of the last update on 2023-10-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.