2026 NPPES data Therapeutic Radiology Physician NPI 1134651599 MD
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GRANT MCKENZIE, MD

Therapeutic Radiology Physician in WINSTON SALEM, 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
64
Medicare Part D claims · 42 beneficiaries · Therapeutic Radiology Physician avg: 138
Industry payments
$543.77
16 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

GRANT MCKENZIE, MD filed 64 Medicare Part D claims in 2023 as a Therapeutic Radiology Physician in WINSTON SALEM, North Carolina.

64
Part D claims, 2023
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.

GRANT MCKENZIE, MD's Medicare Part D volume vs every U.S. prescriber

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

64 0th percentile higher than 0% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. 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)

GRANT MCKENZIE, 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).

What does the federal data show about GRANT MCKENZIE, MD?

Quality data not reported

NPI registry status

Active

Issued 04/03/2017

NPI 1134651599

Primary specialty

Therapeutic Radiology Physician

Rare

303 US NPIs in this specialty

Medicare Part D claims

64 54% vs specialty avg

2023 prescription claims

Specialty avg: 138

Specialty distribution in North Carolina

How Therapeutic Radiology Physician compares to other specialties among North Carolina providers

North Carolina providers

Therapeutic Radiology Physician share within North Carolina

1. Therapeutic Radiology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Therapeutic Radiology Physician share within North Carolina

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Therapeutic Radiology 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).

GRANT MCKENZIE, MD appears in the CMS NPPES registry as a Therapeutic Radiology Physician provider holding MD credentials at 3333 SILAS CREEK PKWY, WINSTON SALEM, NC, 27103, with a listed phone of (336) 718-3013. NPI 1134651599 was issued on 04/03/2017. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MCKENZIE 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 64 prescription claims written by this provider, covering 42 Medicare beneficiaries and totaling roughly $1K in drug spend, with an opioid prescribing rate of 26.6%. 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.

Therapeutic Radiology Physician is a narrow specialty nationwide, with 303 enrolled providers across 42 states and an average of 138 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

3333 SILAS CREEK PKWY
WINSTON SALEM, NC 27103

Provider Details

NPI 1134651599
Specialty Therapeutic Radiology Physician
Credentials MD
Gender Male
NPI Issued 04/03/2017

Hospital and facility affiliations

Facilities where GRANT MCKENZIE, 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.

PIEDMONT RADIATION ONCOLOGY P A
WINSTON SALEM, 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).

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 GRANT MCKENZIE, MD. Source: openpaymentsdata.cms.gov.

Total received

$544

Largest payer

Novocure Inc.

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.

Medicare Part D Prescribing Data

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

64
Total Claims
$1K
Total Drug Cost
42
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
74
Total Day Supply
1,430
Generic Drug Cost
$1K
Opioid Claims
17 (26.6% rate)

Patient Demographics

Average Patient Age
68.2 years
Avg HCC Risk Score
2.40
Gender Split
38% female / 62% male

Therapeutic Radiology Physician Overview

How GRANT MCKENZIE, MD fits within the Therapeutic Radiology Physician landscape nationally.

303
Therapeutic Radiology Physician Providers in US
42
States with Therapeutic Radiology Physician
138
Avg Claims per Provider

GRANT MCKENZIE, MD's 64 claims are below the specialty average of 138.

Nearby Therapeutic Radiology Physician Providers in North Carolina

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

Compare Therapeutic Radiology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is GRANT MCKENZIE, MD's specialty?
GRANT MCKENZIE, MD specializes in Therapeutic Radiology Physician and practices in WINSTON SALEM, North Carolina. Credentials: MD.
How much does GRANT MCKENZIE, MD prescribe under Medicare Part D?
In 2023, GRANT MCKENZIE, MD wrote 64 Medicare Part D claims totaling $1K in drug costs for 42 beneficiaries.
Where is GRANT MCKENZIE, MD located?
GRANT MCKENZIE, MD is located at 3333 SILAS CREEK PKWY, WINSTON SALEM, NC, 27103. Phone: (336) 718-3013.
What is GRANT MCKENZIE, MD's NPI number?
GRANT MCKENZIE, MD's National Provider Identifier (NPI) is 1134651599, issued on 04/03/2017.
Does GRANT MCKENZIE, MD prescribe opioids?
Yes, GRANT MCKENZIE, MD had 17 opioid claims in 2023 with an opioid prescribing rate of 26.6%.
How many Therapeutic Radiology Physician providers are there in the US?
There are 303 Therapeutic Radiology Physician providers across 42 states in the US. The average Therapeutic Radiology Physician provider writes 138 Medicare Part D claims per year.
Does GRANT MCKENZIE, MD accept Medicare?
GRANT MCKENZIE, MD appears in CMS Medicare data with 64 Part D claims and 42 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GRANT MCKENZIE, MD's credentials?
GRANT MCKENZIE, MD's NPI is 1134651599 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