2026 NPPES data General Practice Dentistry NPI 1821167917
Verify on CMS →

WILLIAM BARNWELL

General Practice Dentistry in HENDERSONVILLE, North Carolina. 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
102
Medicare Part D claims · 67 beneficiaries · General Practice Dentistry avg: 82
What the federal data reveals: WILLIAM BARNWELL is a General Practice Dentistry ([object Object]) practicing in HENDERSONVILLE, North Carolina with a Medicare Part D prescribing footprint of 102 claims across 67 beneficiaries .

What stands out: WILLIAM BARNWELL filed 102 Medicare Part D claims in 2023 across HENDERSONVILLE, North Carolina. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

WILLIAM BARNWELL at a glance

Quality data not reported

NPI registry status

Active

Issued 11/06/2006

NPI 1821167917

Primary specialty

General Practice Dentistry

High-volume

121,627 US NPIs in this specialty

Medicare Part D claims

102 24% vs specialty avg

2023 prescription claims

Specialty avg: 82

Specialty distribution in North Carolina

How General Practice Dentistry compares to other specialties among North Carolina providers

North Carolina providers

General Practice Dentistry share within North Carolina

1. General Practice Dentistry42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
General Practice Dentistry share within North Carolina

Specialty board-certification context

Estimated specialty board-certified rate — General Practice Dentistry (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
General Practice Dentistry ABMS/AOA estimate

Est. board-certified rate (General Practice Dentistry) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (General Practice Dentistry) — 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 BARNWELL is a General Practice Dentistry provider practicing in HENDERSONVILLE, North Carolina, according to the CMS National Plan and Provider Enumeration System (NPPES). NPI: 1821167917. 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 BARNWELL appears in the CMS NPPES registry as a General Practice Dentistry provider at 829 FLEMING ST, HENDERSONVILLE, NC, 28791, with a listed phone of (828) 692-9101. NPI 1821167917 was issued on 11/06/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BARNWELL 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 102 prescription claims written by this provider, covering 67 Medicare beneficiaries and totaling roughly $294 in drug spend. 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.

General Practice Dentistry is a high-volume specialty nationwide, with 121,627 enrolled providers across 56 states and an average of 82 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

829 FLEMING ST
HENDERSONVILLE, NC 28791

Provider Details

NPI 1821167917
Specialty General Practice Dentistry
Gender Male
NPI Issued 11/06/2006

Medicare Part D Prescribing Data

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

102
Total Claims
$294
Total Drug Cost
67
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
102
Total Day Supply
557
Brand Drug Cost
$0
Generic Drug Cost
$294
Antibiotic Claims
100

Patient Demographics

Average Patient Age
76.4 years
Avg HCC Risk Score
0.94
Gender Split
66% female / 34% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Amoxicillin
74
Cephalexin
13

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

General Practice Dentistry Overview

How WILLIAM BARNWELL fits within the General Practice Dentistry landscape nationally.

121,627
General Practice Dentistry Providers in US
56
States with General Practice Dentistry
82
Avg Claims per Provider

WILLIAM BARNWELL's 102 claims are above the specialty average of 82.

Nearby General Practice Dentistry Providers in North Carolina

Other clinicians with the same primary specialty enrolled in North Carolina, drawn from the same CMS NPPES roster as BARNWELL.

Compare General Practice Dentistry nationally: see state-by-state distribution →

Frequently Asked Questions

What is WILLIAM BARNWELL's specialty?
WILLIAM BARNWELL specializes in General Practice Dentistry and practices in HENDERSONVILLE, North Carolina.
How much does WILLIAM BARNWELL prescribe under Medicare Part D?
In 2023, WILLIAM BARNWELL wrote 102 Medicare Part D claims totaling $294 in drug costs for 67 beneficiaries.
Where is WILLIAM BARNWELL located?
WILLIAM BARNWELL is located at 829 FLEMING ST, HENDERSONVILLE, NC, 28791. Phone: (828) 692-9101.
What is WILLIAM BARNWELL's NPI number?
WILLIAM BARNWELL's National Provider Identifier (NPI) is 1821167917, issued on 11/06/2006.
How many General Practice Dentistry providers are there in the US?
There are 121,627 General Practice Dentistry providers across 56 states in the US. The average General Practice Dentistry provider writes 82 Medicare Part D claims per year.
What drugs does WILLIAM BARNWELL prescribe most often?
Based on 2023 Medicare Part D data, WILLIAM BARNWELL's most frequently prescribed drugs include Amoxicillin, Cephalexin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WILLIAM BARNWELL accept Medicare?
WILLIAM BARNWELL appears in CMS Medicare data with 102 Part D claims and 67 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM BARNWELL's credentials?
WILLIAM BARNWELL's NPI is 1821167917. 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