Jason Day, MD
NPI 1427205038 · Vascular Neurology Physician · Oak Lawn, IL
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jason Day, MD is a Vascular Neurology Physician provider in Oak Lawn, IL (NPI 1427205038).
Provider details
- NPI number
- 1427205038
- Entity type
- Individual
- Primary specialty
- Vascular Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- ME120414 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
397 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 119 | $82 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 79 | $128 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 71 | $137 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 28 | $92 |
| Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221 | 25 | $87 |
| Critical Care, First 30-74 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 104 | 27 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 47 | 20 |
| Atorvastatin Calcium | 44 | 15 |
| Ticagrelorbrand: Brilinta | 35 | — |
| Levetiracetam | 34 | — |
| Rivaroxabanbrand: Xarelto | 21 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$6,123 across 16 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
Additional practice locations (1)
- 841 Prudential Dr Fl 10Credentialing DepartmentJacksonville, FL 32207-8329Phone: (904) 398-5404Fax: (904) 391-5545
Registry dates
- Enumerated
- 2008-08-26
- Last updated
- 2026-01-19
- Certified
- 2026-01-19
Frequently asked questions
- What is Jason Day's NPI number?
- Jason Day's National Provider Identifier (NPI) is 1427205038, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jason Day's specialty?
- Jason Day is listed in the NPPES registry with a primary specialty of Vascular Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Jason Day located?
- Jason Day's practice location on file with NPPES is 4440 W 95th St, Oak Lawn, IL 60453-2600.
- What is Jason Day's phone number?
- The practice phone number listed in the NPPES registry for Jason Day is (303) 436-2727.
- Does Jason Day accept Medicare?
- Jason Day is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jason Day's NPI active?
- Yes — Jason Day's NPI (1427205038) is active in the NPPES registry as of the last update on 2026-01-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.