Dr. Gautham Viswanathan, MD
- Medicare services, 2024
- 2,459
- Medicare patients, 2024
- 575
- Part D claims, 2024
- 3,576
- Publications
- 4
- Clinical trials
- 1
- Practice address
- 660 Cherokee NE St, Marietta, GA 30060
- Practice phone
- Call (404) 355-7375
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Piedmont Nephrology and Internal Medicine
Marietta, Georgia
Find Dr. Viswanathan's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gautham Viswanathan is a nephrologist in Marietta, Georgia
Dr. Viswanathan practices at Piedmont Nephrology and Internal Medicine in Marietta, Georgia.
Dr. Viswanathan's NPI, 1427194257, was assigned on January 29, 2007. Dr. Viswanathan holds Georgia license 71645.
- NPI
- 1427194257NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9931184298
- NPI enumeration date
- January 29, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (404) 355-7375
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gautham Viswanathan practices at Piedmont Nephrology and Internal Medicine in Marietta, Georgia
Dr. Viswanathan's primary practice is Piedmont Nephrology and Internal Medicine, at 660 Cherokee NE St, Marietta, GA 30060 in Cobb County. The practice phone is (404) 355-7375.
- Piedmont Nephrology and Internal Medicine660 Cherokee NE St, Marietta, GA 30060 · Cobb CountyPhone(404) 355-7375
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gautham Viswanathan is affiliated with 10 sites of care and 1 medical group
Dr. Viswanathan's primary practice is Piedmont Nephrology and Internal Medicine in Marietta, Georgia. Dr. Viswanathan is also affiliated with Wellstar Kennestone Regional Medical Center. The medical group on file is Piedmont Nephrology and Internal Medicine. Dmand AI also links Dr. Viswanathan to 2 more hospitals, 4 dialysis centers, 1 physician office and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gautham Viswanathan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Viswanathan practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Piedmont Nephrology and Internal Medicine | Available with a free account |
| +9 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gautham Viswanathan is one of 381 nephrologists in Georgia
Nephrology is Dr. Viswanathan's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dmand AI has Dr. Viswanathan's licenses on file in 2 states: Georgia and Indiana.
Specialties and state licenses
- Nephrology, GeorgiaPrimary
- Internal medicine, Indiana
Nephrologists near Dr. Viswanathan
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gautham Viswanathan billed Medicare for 2,459 services in 2024
CMS data shows 2,459 Medicare services from Dr. Viswanathan across 18 procedure codes in 2024, for 575 Medicare patients. Medicare paid $157,674 for them.
Dr. Viswanathan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8942024: 1,47765%
- Lab and pathology
- 2023: 5582024: 5855%
- Tests and treatments
- 2023: 6312024: 27656%
- Other services
- 2023: 02024: 100
- Surgery
- 2023: 02024: 21
Where Dr. Viswanathan's Medicare services took place, 2024
- In an office2,19889%
- In a facility26111%
Dr. Viswanathan compared with the Georgia median for nephrologists, 2024
- Dr. Viswanathan
- Georgia median
- Medicare services
- 2,459vs 1,1242.2 times
- Medicare patients
- 575vs 31881% above
- Part D claims
- 3,308vs 1,0923.0 times
Medians across 377 nephrologists in Georgia with Dmand AI profiles that report each measure.
Dr. Viswanathan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Viswanathan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Viswanathan and other nephrologists in Georgia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gautham Viswanathan treated 575 Medicare patients in 2024, average age 74
CMS counts 575 Medicare patients who saw Dr. Viswanathan in 2024. The largest group is 75 to 84, with 224 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 11% are also on Medicaid. Their average risk score is 2.72, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Viswanathan's median patient age at 69, with 48% women.
Dr. Viswanathan's Medicare patients by age, 2024
Dr. Viswanathan's Medicare patients by sex, 2024
- Women29151%
- Men28449%
Chronic conditions among Dr. Viswanathan's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease51%
- Arthritis47%
- Diabetes46%
- Heart failure41%
- Atrial fibrillation29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Viswanathan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gautham Viswanathan wrote 3,576 Medicare Part D claims in 2024
In 2024, Dr. Viswanathan wrote 3,576 Medicare Part D claims for 556 patients. 80% of them were for generic drugs. CMS names the drug for 3,308 of them, across 59 drugs with 11 or more claims each, at $828,413 in total drug cost. In 2023, CMS named 2,907 claims across 55 drugs.
Dr. Viswanathan's Part D claims by kind of drug, 2024
- Generic2,858 claims80%
- Brand-name718 claims20%
Dr. Viswanathan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Viswanathan's Part D claims, 2024
- Antibiotics1%47 of 3,576 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,9072024: 3,30814%
Drugs named by CMS: 59 in 2024, 55 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Gautham Viswanathan scored 97 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Dr. Viswanathan for performance year 2024, reported as part of a group. Dr. Viswanathan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Viswanathan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Viswanathan's MIPS scores, performance year 2024
- 97of 100Final score
- 100of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 74of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Gautham Viswanathan has 4 publications on record
Dmand AI links 4 papers to Dr. Viswanathan, published from 2010 to 2012. The most frequent topics are Albuminuria and Creatinine. Dr. Viswanathan's most frequent co-authors are Abraham Cohen Bucay, MD and Ashish Upadhyay, MD.
Topics Dr. Viswanathan writes about most
- Albuminuria
- Creatinine
Dr. Viswanathan's most frequent co-authors
Recent publications by Dr. Viswanathan
Adv Chronic Kidney Dis
See who Dr. Viswanathan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Viswanathan works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gautham Viswanathan has worked on 1 clinical trial
Dmand AI links Dr. Viswanathan to 1 clinical trial. Conditions studied include Essential Hypertension and Hypertension.
Conditions in Dr. Viswanathan's trials
- Essential Hypertension
- Hypertension
Investigators on the most trials with Dr. Viswanathan
Recent clinical trials with Dr. Viswanathan
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Gautham Viswanathan received $10,189 in industry payments from 2016 to 2025
CMS Open Payments shows 196 general payments to Dr. Viswanathan from 31 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 34% of the total. Otsuka America Pharmaceutical, Inc. paid the most, $3,766.
General payments to Dr. Viswanathan by program year, 2016 to 2025
General payments to Dr. Viswanathan by kind, 2016 to 2025
- Consulting fees$3,44434%
- Food and beverage$3,28332%
- Speaker and faculty fees$2,70026%
- Travel and lodging$5776%
- Education$1852%
Companies that paid Dr. Viswanathan the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Gautham Viswanathan's profile data
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gautham Viswanathan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gautham Viswanathan's NPI number?
Dr. Gautham Viswanathan's NPI number is 1427194257. It was assigned on January 29, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Gautham Viswanathan?
Dr. Gautham Viswanathan is a nephrologist in Marietta, Georgia. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Gautham Viswanathan practice?
Dr. Viswanathan practices at 660 Cherokee NE St, Marietta, GA 30060. Dr. Viswanathan's primary practice is Piedmont Nephrology and Internal Medicine in Marietta, Georgia. Dmand AI also links Dr. Viswanathan to 2 hospitals, 4 dialysis centers, 1 physician office and 1 group practice or clinic.
What is Dr. Gautham Viswanathan's office phone number?
The practice phone on file for Dr. Viswanathan is (404) 355-7375.
What is Dr. Gautham Viswanathan's medical license number?
Dr. Viswanathan holds Georgia license 71645, one of the licenses on file in 2 states.
Which states has Dr. Gautham Viswanathan been licensed in?
Dmand AI has state licenses on file for Dr. Viswanathan in Georgia and Indiana.
Which hospitals is Dr. Gautham Viswanathan affiliated with?
Dr. Viswanathan is affiliated with Wellstar Kennestone Regional Medical Center. Dmand AI links Dr. Viswanathan to 2 more hospitals.
What medical group is Dr. Gautham Viswanathan part of?
Dr. Viswanathan is linked to Piedmont Nephrology and Internal Medicine.
Does Dr. Gautham Viswanathan accept Medicare?
Yes. CMS data shows Dr. Viswanathan billed Medicare for 2,459 services in 2024, and Dr. Viswanathan accepts Medicare assignment.
Does Dr. Gautham Viswanathan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Viswanathan as offering telehealth services.
Show 8 more questionsShow fewer questions
What is Dr. Gautham Viswanathan's MIPS score?
Dr. Viswanathan's MIPS final score for performance year 2024 is 97 out of 100, reported as part of a group.
How many Medicare patients does Dr. Gautham Viswanathan see?
CMS counts 575 Medicare patients who saw Dr. Viswanathan in 2024, with an average age of 74.
What services does Dr. Gautham Viswanathan bill to Medicare?
In 2024, Dr. Viswanathan's most billed Medicare services were lab and pathology test (81003), office visit, established patient (99214) and office visit, established patient (99213).
What drugs does Dr. Gautham Viswanathan prescribe most?
In 2024 Medicare Part D data, Dr. Viswanathan's most prescribed drugs by claims were Amlodipine Besylate, Farxiga and Jardiance.
Has Dr. Gautham Viswanathan received payments from drug or device companies?
CMS Open Payments shows $10,189 in general payments to Dr. Viswanathan from 31 companies from 2016 to 2025. The largest total came from Otsuka America Pharmaceutical, Inc.
How long has Dr. Gautham Viswanathan been practicing?
Dr. Viswanathan graduated from medical school in 1998, 28 years ago.
Does Dr. Gautham Viswanathan do research?
Dmand AI links 4 publications to Dr. Viswanathan, published from 2010 to 2012. Dr. Viswanathan has worked on 1 clinical trial.
Who does Dr. Gautham Viswanathan publish with?
Dr. Viswanathan's most frequent co-authors are Abraham Cohen Bucay, MD (1 shared paper) and Ashish Upadhyay, MD (1 shared paper).
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