2026 NPPES data Nephrology Physician NPI 1407894710 MD
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WILLIAM GABBARD, MD

Nephrology Physician in SAVANNAH, 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 · 295 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: WILLIAM GABBARD, MD is a Nephrology Physician ([object Object]) practicing in SAVANNAH, Georgia with a Medicare Part D prescribing footprint of 2K claims across 295 beneficiaries — 9% brand-name prescribing .

What stands out: WILLIAM GABBARD, MD filed 1,619 Medicare Part D claims in 2023 across SAVANNAH, Georgia. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

WILLIAM GABBARD, MD 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).

WILLIAM GABBARD, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 06/02/2006

NPI 1407894710

Primary specialty

Nephrology Physician

Mid-sized

10,534 US NPIs in this specialty

Medicare Part D claims

1,619 11% 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).

WILLIAM GABBARD, MD is a Nephrology Physician provider practicing in SAVANNAH, Georgia, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1407894710. 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.

WILLIAM GABBARD, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 146 CHERRYFIELD LN, SAVANNAH, GA, 31419, with a listed phone of (865) 850-8790. NPI 1407894710 was issued on 06/02/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GABBARD 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 1,619 prescription claims written by this provider, covering 295 Medicare beneficiaries and totaling roughly $145K in drug spend, split 9% brand-name and 91% 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

146 CHERRYFIELD LN
SAVANNAH, GA 31419

Provider Details

NPI 1407894710
Specialty Nephrology Physician
Credentials MD
Gender Male
NPI Issued 06/02/2006

Hospital and facility affiliations

Facilities where WILLIAM GABBARD, MD 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.

OCHSNER CLINIC LLC
BATON ROUGE, LA

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

Brand vs generic prescribing mix · Generic-heavy

WILLIAM GABBARD, MD — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 1,619 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.

1,619
Total Claims
$145K
Total Drug Cost
295
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,750
Total Day Supply
111,148
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$91K
Generic Drug Cost
$55K

Patient Demographics

Average Patient Age
70.3 years
Avg HCC Risk Score
3.05
Gender Split
57% female / 43% male
Age Distribution
<65: 67, 65-74: 109, 75-84: 93, 85+: 26

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Amlodipine Besylate
132
Telmisartan
119
Torsemide
114
Calcitriol
101
Allopurinol
89
Carvedilol
76
Losartan Potassium
63
Nifedipine Er
Nifedipine
49
Hydralazine Hcl
44
Vitamin D2
Ergocalciferol (Vitamin D2)
44

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

Nephrology Physician Overview

How WILLIAM GABBARD, MD 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

WILLIAM GABBARD, MD's 1,619 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 GABBARD.

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

Frequently Asked Questions

What is WILLIAM GABBARD, MD's specialty?
WILLIAM GABBARD, MD specializes in Nephrology Physician and practices in SAVANNAH, Georgia. Credentials: MD.
How much does WILLIAM GABBARD, MD prescribe under Medicare Part D?
In 2023, WILLIAM GABBARD, MD wrote 1,619 Medicare Part D claims totaling $145K in drug costs for 295 beneficiaries.
Where is WILLIAM GABBARD, MD located?
WILLIAM GABBARD, MD is located at 146 CHERRYFIELD LN, SAVANNAH, GA, 31419. Phone: (865) 850-8790.
What is WILLIAM GABBARD, MD's NPI number?
WILLIAM GABBARD, MD's National Provider Identifier (NPI) is 1407894710, issued on 06/02/2006.
Does WILLIAM GABBARD, MD prescribe more brand-name or generic drugs?
WILLIAM GABBARD, MD's prescribing is 9% brand-name and 91% generic drugs by claim count, with $91K 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 WILLIAM GABBARD, MD prescribe most often?
Based on 2023 Medicare Part D data, WILLIAM GABBARD, MD's most frequently prescribed drugs include Amlodipine Besylate, Telmisartan, Torsemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WILLIAM GABBARD, MD accept Medicare?
WILLIAM GABBARD, MD appears in CMS Medicare data with 1,619 Part D claims and 295 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM GABBARD, MD's credentials?
WILLIAM GABBARD, MD's NPI is 1407894710 with credentials MD. 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