2026 NPPES data Geriatric Medicine (Family Medicine) Physician NPI 1144273632 MD
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WILLIAM SAYLES, MD

Geriatric Medicine (Family Medicine) Physician in LOUISBURG, 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
4K
Medicare Part D claims · 318 beneficiaries · Geriatric Medicine (Family Medicine) Physician avg: 5K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: WILLIAM SAYLES, MD is a Geriatric Medicine (Family Medicine) Physician ([object Object]) practicing in LOUISBURG, North Carolina with a Medicare Part D prescribing footprint of 4K claims across 318 beneficiaries — 9% brand-name prescribing .

What stands out: WILLIAM SAYLES, MD filed 4,401 Medicare Part D claims in 2023 across LOUISBURG, North Carolina. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

WILLIAM SAYLES, 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 SAYLES, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 05/18/2006

NPI 1144273632

Primary specialty

Geriatric Medicine (Family Medicine) Physician

Niche

1,779 US NPIs in this specialty

Medicare Part D claims

4,401 9% vs specialty avg

2023 prescription claims

Specialty avg: 4,854

Specialty distribution in North Carolina

How Geriatric Medicine (Family Medicine) Physician compares to other specialties among North Carolina providers

North Carolina providers

Geriatric Medicine (Family Medicine) Physician share within North Carolina

1. Geriatric Medicine (Family Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Geriatric Medicine (Family Medicine) Physician share within North Carolina

Specialty board-certification context

Estimated specialty board-certified rate — Geriatric Medicine (Family Medicine) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Geriatric Medicine (Family Medicine) Physician ABMS/AOA estimate

Est. board-certified rate (Geriatric Medicine (Family Medicine) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Geriatric Medicine (Family Medicine) 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 SAYLES, MD is a Geriatric Medicine (Family Medicine) Physician provider practicing in LOUISBURG, North Carolina, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1144273632. 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 SAYLES, MD appears in the CMS NPPES registry as a Geriatric Medicine (Family Medicine) Physician provider holding MD credentials at 601 N BICKETT BLVD, LOUISBURG, NC, 27549, with a listed phone of (919) 496-3680. NPI 1144273632 was issued on 05/18/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SAYLES 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 4,401 prescription claims written by this provider, covering 318 Medicare beneficiaries and totaling roughly $319K in drug spend, split 9% brand-name and 91% generic by claim count, with an opioid prescribing rate of 1.7%. 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.

Geriatric Medicine (Family Medicine) Physician is a narrow specialty nationwide, with 1,779 enrolled providers across 52 states and an average of 4,854 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

601 N BICKETT BLVD
LOUISBURG, NC 27549

Provider Details

NPI 1144273632
Specialty Geriatric Medicine (Family Medicine) Physician
Credentials MD
Gender Male
NPI Issued 05/18/2006

Hospital and facility affiliations

Facilities where WILLIAM SAYLES, 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.

CAROLINA PHYSICAL THERAPY ASSOCIATES LLC
LOUISBURG, NC

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

9% brand-name claims vs 91% generic, on 4,401 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.

4,401
Total Claims
$319K
Total Drug Cost
318
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
10,158
Total Day Supply
294,092
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$246K
Generic Drug Cost
$72K
Opioid Claims
74 (1.7% rate)
Antibiotic Claims
118

Patient Demographics

Average Patient Age
71.4 years
Avg HCC Risk Score
0.93
Gender Split
47% female / 53% male
Age Distribution
<65: 26, 65-74: 195, 75-84: 85, 85+: 12

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
261
Atorvastatin Calcium
206
Pioglitazone Hcl
174
Hydrochlorothiazide
168
Losartan Potassium
129
Montelukast Sodium
127
Lisinopril
112
Levothyroxine Sodium
110
Metoprolol Succinate
110
Metformin Hcl Er
Metformin Hcl
109

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

Geriatric Medicine (Family Medicine) Physician Overview

How WILLIAM SAYLES, MD fits within the Geriatric Medicine (Family Medicine) Physician landscape nationally.

1,779
Geriatric Medicine (Family Medicine) Physician Providers in US
52
States with Geriatric Medicine (Family Medicine) Physician
4,854
Avg Claims per Provider

WILLIAM SAYLES, MD's 4,401 claims are below the specialty average of 4,854.

Nearby Geriatric Medicine (Family Medicine) Physician Providers in North Carolina

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

Compare Geriatric Medicine (Family Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is WILLIAM SAYLES, MD's specialty?
WILLIAM SAYLES, MD specializes in Geriatric Medicine (Family Medicine) Physician and practices in LOUISBURG, North Carolina. Credentials: MD.
How much does WILLIAM SAYLES, MD prescribe under Medicare Part D?
In 2023, WILLIAM SAYLES, MD wrote 4,401 Medicare Part D claims totaling $319K in drug costs for 318 beneficiaries.
Where is WILLIAM SAYLES, MD located?
WILLIAM SAYLES, MD is located at 601 N BICKETT BLVD, LOUISBURG, NC, 27549. Phone: (919) 496-3680.
What is WILLIAM SAYLES, MD's NPI number?
WILLIAM SAYLES, MD's National Provider Identifier (NPI) is 1144273632, issued on 05/18/2006.
Does WILLIAM SAYLES, MD prescribe more brand-name or generic drugs?
WILLIAM SAYLES, MD's prescribing is 9% brand-name and 91% generic drugs by claim count, with $246K in brand drug costs.
Does WILLIAM SAYLES, MD prescribe opioids?
Yes, WILLIAM SAYLES, MD had 74 opioid claims in 2023 with an opioid prescribing rate of 1.7%.
How many Geriatric Medicine (Family Medicine) Physician providers are there in the US?
There are 1,779 Geriatric Medicine (Family Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Family Medicine) Physician provider writes 4,854 Medicare Part D claims per year.
What drugs does WILLIAM SAYLES, MD prescribe most often?
Based on 2023 Medicare Part D data, WILLIAM SAYLES, MD's most frequently prescribed drugs include Amlodipine Besylate, Atorvastatin Calcium, Pioglitazone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WILLIAM SAYLES, MD accept Medicare?
WILLIAM SAYLES, MD appears in CMS Medicare data with 4,401 Part D claims and 318 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM SAYLES, MD's credentials?
WILLIAM SAYLES, MD's NPI is 1144273632 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