Vairavan Viswanathan, M.D.
NPI 1326083890 · Internal Medicine Physician · Joliet, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vairavan Viswanathan, M.D. is a Internal Medicine Physician provider in Joliet, IL (NPI 1326083890).
Provider details
- NPI number
- 1326083890
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 36-087483 (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
20 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
8,073 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 | 1,464 | $131 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 1,159 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 942 | $10 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 889 | $13 |
| 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 | 783 | $17 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 130 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 750 | 214 |
| Rosuvastatin Calcium | 560 | 169 |
| Atorvastatin Calcium | 551 | 149 |
| Losartan Potassium | 525 | 148 |
| Levothyroxine Sodium | 502 | 135 |
| Metoprolol Succinate | 420 | 115 |
| Lisinopril |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$503 across 12 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
- 2006-06-18
- Last updated
- 2023-08-28
- Certified
- 2023-08-28
Frequently asked questions
- What is Vairavan Viswanathan's NPI number?
- Vairavan Viswanathan's National Provider Identifier (NPI) is 1326083890, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vairavan Viswanathan's specialty?
- Vairavan Viswanathan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Vairavan Viswanathan located?
- Vairavan Viswanathan's practice location on file with NPPES is 2100 Glenwood Ave, Joliet, IL 60435-5487.
- What is Vairavan Viswanathan's phone number?
- The practice phone number listed in the NPPES registry for Vairavan Viswanathan is (815) 725-2121.
- Does Vairavan Viswanathan accept Medicare?
- Vairavan Viswanathan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vairavan Viswanathan's NPI active?
- Yes — Vairavan Viswanathan's NPI (1326083890) is active in the NPPES registry as of the last update on 2023-08-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.