Julian Vassay, M.D.
NPI 1003922782 · Internal Medicine Physician · Mattoon, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Julian Vassay, M.D. is a Internal Medicine Physician provider in Mattoon, IL (NPI 1003922782).
Provider details
- NPI number
- 1003922782
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036-092334 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
1,068 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 286 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 233 | $125 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 146 | $89 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 117 | $14 |
| Administration of Influenza Virus VaccineG0008 | 60 | $31 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 151 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 721 | 184 |
| Amlodipine Besylate | 516 | 119 |
| Losartan Potassium | 368 | 93 |
| Levothyroxine Sodium | 354 | 84 |
| Lisinopril | 349 | 81 |
| Pantoprazole Sodium | 278 | 72 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$534 across 31 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
- 2006-08-22
- Last updated
- 2019-01-08
Frequently asked questions
- What is Julian Vassay's NPI number?
- Julian Vassay's National Provider Identifier (NPI) is 1003922782, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Julian Vassay's specialty?
- Julian Vassay is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Julian Vassay located?
- Julian Vassay's practice location on file with NPPES is 101 Professional Plaza, Mattoon, IL 61938.
- What is Julian Vassay's phone number?
- The practice phone number listed in the NPPES registry for Julian Vassay is (217) 258-2110.
- Does Julian Vassay accept Medicare?
- Julian Vassay is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Julian Vassay's NPI active?
- Yes — Julian Vassay's NPI (1003922782) is active in the NPPES registry as of the last update on 2019-01-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.