2026 NPPES data Nephrology Physician NPI 1639388903 M.D.
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SUNITHA KALYANAM, M.D.

Nephrology Physician in GAINESVILLE, Georgia. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
2K
Medicare Part D claims · 377 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.0K
53 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

SUNITHA KALYANAM, M.D. filed 2,094 Medicare Part D claims in 2023 as a Nephrology Physician in GAINESVILLE, Georgia, prescribing 87% generic.

2K
Part D claims, 2023
87%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

SUNITHA KALYANAM, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

2,094 Top 16% higher than 84% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

SUNITHA KALYANAM, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about SUNITHA KALYANAM, M.D.?

Quality data not reported

NPI registry status

Active

Issued 05/22/2007

NPI 1639388903

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

2,094 44% vs specialty avg

2023 prescription claims

Specialty avg: 1,454

Specialty distribution in Georgia

How Nephrology Physician compares to other specialties among Georgia providers

Georgia providers

Nephrology Physician share within Georgia

1. Nephrology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Nephrology Physician share within Georgia

Specialty board-certification context

Estimated specialty board-certified rate — Nephrology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Nephrology Physician ABMS/AOA estimate

Est. board-certified rate (Nephrology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Nephrology Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

SUNITHA KALYANAM, M.D. is a Nephrology Physician provider practicing in GAINESVILLE, Georgia, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1639388903. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

SUNITHA KALYANAM, M.D. appears in the CMS NPPES registry as a Nephrology Physician provider holding M.D. credentials at 663 LANIER PARK DR, GAINESVILLE, GA, 30501, with a listed phone of (678) 450-0202. NPI 1639388903 was issued on 05/22/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KALYANAM most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 2,094 prescription claims written by this provider, covering 377 Medicare beneficiaries and totaling roughly $317K in drug spend, split 13% brand-name and 87% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

663 LANIER PARK DR
GAINESVILLE, GA 30501

Provider Details

NPI 1639388903
Specialty Nephrology Physician
Credentials M.D.
Gender Female
NPI Issued 05/22/2007

Hospital and facility affiliations

Facilities where SUNITHA KALYANAM, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

KIDNEY CARE CENTER OF GEORGIA LLC
GAINESVILLE, GA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for SUNITHA KALYANAM, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$1.0K

Largest payer

AstraZeneca Pharmaceuticals LP

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Typical

SUNITHA KALYANAM, M.D. — brand share 13.0%
Specialty average (est.)

13% brand-name claims vs 87% generic, on 2,094 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

2,094
Total Claims
$317K
Total Drug Cost
377
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
4,189
Total Day Supply
122,339
Brand vs Generic
13% brand / 87% generic
Brand Drug Cost
$243K
Generic Drug Cost
$75K
Antibiotic Claims
64

Patient Demographics

Average Patient Age
72.8 years
Avg HCC Risk Score
2.83
Gender Split
58% female / 42% male
Age Distribution
<65: 61, 65-74: 143, 75-84: 133, 85+: 40

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Furosemide
152
Hydralazine Hcl
136
Losartan Potassium
121
Amlodipine Besylate
118
Potassium Chloride
112
Torsemide
101
Nifedipine Er
Nifedipine
85
Veltassa
Patiromer Calcium Sorbitex
84
Calcitriol
83
Allopurinol
80

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Nephrology Physician Overview

How SUNITHA KALYANAM, M.D. fits within the Nephrology Physician landscape nationally.

10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider

SUNITHA KALYANAM, M.D.'s 2,094 claims are above the specialty average of 1,454.

Nearby Nephrology Physician Providers in Georgia

Other clinicians with the same primary specialty enrolled in Georgia, drawn from the same CMS NPPES roster as KALYANAM.

Compare Nephrology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is SUNITHA KALYANAM, M.D.'s specialty?
SUNITHA KALYANAM, M.D. specializes in Nephrology Physician and practices in GAINESVILLE, Georgia. Credentials: M.D..
How much does SUNITHA KALYANAM, M.D. prescribe under Medicare Part D?
In 2023, SUNITHA KALYANAM, M.D. wrote 2,094 Medicare Part D claims totaling $317K in drug costs for 377 beneficiaries.
Where is SUNITHA KALYANAM, M.D. located?
SUNITHA KALYANAM, M.D. is located at 663 LANIER PARK DR, GAINESVILLE, GA, 30501. Phone: (678) 450-0202.
What is SUNITHA KALYANAM, M.D.'s NPI number?
SUNITHA KALYANAM, M.D.'s National Provider Identifier (NPI) is 1639388903, issued on 05/22/2007.
Does SUNITHA KALYANAM, M.D. prescribe more brand-name or generic drugs?
SUNITHA KALYANAM, M.D.'s prescribing is 13% brand-name and 87% generic drugs by claim count, with $243K in brand drug costs.
How many Nephrology Physician providers are there in the US?
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does SUNITHA KALYANAM, M.D. prescribe most often?
Based on 2023 Medicare Part D data, SUNITHA KALYANAM, M.D.'s most frequently prescribed drugs include Furosemide, Hydralazine Hcl, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does SUNITHA KALYANAM, M.D. accept Medicare?
SUNITHA KALYANAM, M.D. appears in CMS Medicare data with 2,094 Part D claims and 377 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify SUNITHA KALYANAM, M.D.'s credentials?
SUNITHA KALYANAM, M.D.'s NPI is 1639388903 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology