Gautham Viswanathan, M.D.
NPI 1427194257 · Nephrology Physician · Atlanta, GA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gautham Viswanathan, M.D. is a Nephrology Physician provider in Atlanta, GA (NPI 1427194257).
Provider details
- NPI number
- 1427194257
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 01059360A (IN)
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 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
2,459 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) |
|---|---|---|
| Automated Urinalysis Test81003 | 585 | $2 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 540 | $133 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 196 | $94 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, Each Additional 20 Minutes99458 | 175 | $41 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 137 | $81 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, First 20 Minutes99457 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 59 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 272 | 112 |
| Dapagliflozin Propanediolbrand: Farxiga | 183 | 44 |
| Empagliflozinbrand: Jardiance | 164 | 49 |
| Losartan Potassium | 164 | 59 |
| Hydralazine Hcl | 138 | 48 |
| Allopurinol | 136 | 42 |
| Torsemide | 131 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$503 across 26 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
- 2007-01-29
- Last updated
- 2014-10-29
Frequently asked questions
- What is Gautham Viswanathan's NPI number?
- Gautham Viswanathan's National Provider Identifier (NPI) is 1427194257, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gautham Viswanathan's specialty?
- Gautham Viswanathan is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Gautham Viswanathan located?
- Gautham Viswanathan's practice location on file with NPPES is 35 Collier Rd Nw, Atlanta, GA 30309-1613.
- What is Gautham Viswanathan's phone number?
- The practice phone number listed in the NPPES registry for Gautham Viswanathan is (404) 355-7375.
- Does Gautham Viswanathan accept Medicare?
- Gautham Viswanathan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gautham Viswanathan's NPI active?
- Yes — Gautham Viswanathan's NPI (1427194257) is active in the NPPES registry as of the last update on 2014-10-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.