Avinash Viswanathan, M.D.
NPI 1639487911 · Internal Medicine Physician · Springfield, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Avinash Viswanathan, M.D. is a Internal Medicine Physician provider in Springfield, IL (NPI 1639487911).
Provider details
- NPI number
- 1639487911
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036.133495 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 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
1,318 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 | 687 | $122 |
| 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 | 478 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 96 | $86 |
| Administration of Pneumococcal VaccineG0009 | 25 | $31 |
| Administration of Influenza Virus VaccineG0008 | 18 | $30 |
| Removal of Impacted Ear Wax69210 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 170 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 731 | 195 |
| Amlodipine Besylate | 566 | 160 |
| Levothyroxine Sodium | 501 | 133 |
| Rosuvastatin Calcium | 472 | 136 |
| Metoprolol Succinate | 417 | 112 |
| Lisinopril | 379 | 95 |
| Pantoprazole Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-09-20
- Last updated
- 2014-05-23
Frequently asked questions
- What is Avinash Viswanathan's NPI number?
- Avinash Viswanathan's National Provider Identifier (NPI) is 1639487911, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Avinash Viswanathan's specialty?
- Avinash Viswanathan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Avinash Viswanathan located?
- Avinash Viswanathan's practice location on file with NPPES is 3132 Old Jacksonville Rd, Springfield, IL 62704-7400.
- What is Avinash Viswanathan's phone number?
- The practice phone number listed in the NPPES registry for Avinash Viswanathan is (217) 862-0741.
- Does Avinash Viswanathan accept Medicare?
- Avinash Viswanathan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Avinash Viswanathan's NPI active?
- Yes — Avinash Viswanathan's NPI (1639487911) is active in the NPPES registry as of the last update on 2014-05-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.