2026 NPPES data Radiation Oncology Physician NPI 1043243884 M.D. PH.D.
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CHARLES STEWART, M.D. PH.D.

Radiation Oncology Physician in TULSA, Oklahoma. 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
248
Medicare Part D claims · 116 beneficiaries · Radiation Oncology Physician avg: 186
MIPS score
93.2246/100
▲ 10 pts above national avg 83.1 · [object Object]
Industry payments
$49.53
3 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: CHARLES STEWART, M.D. PH.D. is a Radiation Oncology Physician ([object Object]) practicing in TULSA, Oklahoma with a Medicare Part D prescribing footprint of 248 claims across 116 beneficiaries . Their CMS MIPS Final Score of 93.2246/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities . Industry payments of $49.53 across 3 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: CHARLES STEWART, M.D. PH.D. reported a CMS MIPS final score of 93.2246 out of 100, above the 83.1 national average, and filed 248 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

CHARLES STEWART, M.D. PH.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

CHARLES STEWART, M.D. PH.D. at a glance

High performer (top quartile)

NPI registry status

Active

Issued 07/07/2006

NPI 1043243884

Primary specialty

Radiation Oncology Physician

Mid-sized

6,018 US NPIs in this specialty

Medicare Part D claims

248 33% vs specialty avg

2023 prescription claims

Specialty avg: 186

MIPS final score

93.2246/100 10.124600000000001% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Oklahoma

How Radiation Oncology Physician compares to other specialties among Oklahoma providers

Oklahoma providers

Radiation Oncology Physician share within Oklahoma

1. Radiation Oncology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Radiation Oncology Physician share within Oklahoma

Medicare quality performance — MIPS

CHARLES STEWART, M.D. PH.D.'s 2023 MIPS final score plotted against the Radiation Oncology Physician national average

High performer (top quartile)
MIPS Final Score
93.2246/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Radiation Oncology Physician) — 93.2246/100 vs national avg 83.1

0%100%National avg83%93.2%
MIPS final score (Radiation Oncology Physician) — 93.2246/100 vs national avg 83.1

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).

CHARLES STEWART, M.D. PH.D. is a Radiation Oncology Physician provider practicing in TULSA, Oklahoma, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D. PH.D.. NPI: 1043243884. 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.

CHARLES STEWART, M.D. PH.D. appears in the CMS NPPES registry as a Radiation Oncology Physician provider holding M.D. PH.D. credentials at 11212 E 48TH ST, TULSA, OK, 74146, with a listed phone of (918) 497-3715. NPI 1043243884 was issued on 07/07/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what STEWART 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 248 prescription claims written by this provider, covering 116 Medicare beneficiaries and totaling roughly $11K in drug spend, with an opioid prescribing rate of 9.7%. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 93.2246/100 for the 2023 performance year (Quality 82.4178), compared with the national average of 83.1.

Radiation Oncology Physician is a mid-sized specialty nationwide, with 6,018 enrolled providers across 52 states and an average of 186 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

11212 E 48TH ST
TULSA, OK 74146

Provider Details

NPI 1043243884
Specialty Radiation Oncology Physician
Credentials M.D. PH.D.
Gender Male
NPI Issued 07/07/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

93.2246
Final Score
Avg: 83.1
82.4178
Quality

Reporting: Group practice

Hospital and facility affiliations

Facilities where CHARLES STEWART, M.D. PH.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.

RADIATION THERAPY SPECIALISTS OF TULSA, PLLC
TULSA, OK
WARREN CLINIC INC
TULSA, OK

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 CHARLES STEWART, M.D. PH.D.. Source: openpaymentsdata.cms.gov.

Total received

$50

Largest payer

Novartis Pharmaceuticals Corporation

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.

248
Total Claims
$11K
Total Drug Cost
116
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
403
Total Day Supply
10,469
Generic Drug Cost
$9K
Opioid Claims
24 (9.7% rate)

Patient Demographics

Average Patient Age
72.4 years
Avg HCC Risk Score
1.53
Gender Split
59% female / 41% 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
Pentoxifylline
80
Gabapentin
23
Pantoprazole Sodium
21
Oxycodone Hcl
16
Dexamethasone
12

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

Radiation Oncology Physician Overview

How CHARLES STEWART, M.D. PH.D. fits within the Radiation Oncology Physician landscape nationally.

6,018
Radiation Oncology Physician Providers in US
52
States with Radiation Oncology Physician
186
Avg Claims per Provider

CHARLES STEWART, M.D. PH.D.'s 248 claims are above the specialty average of 186.

Nearby Radiation Oncology Physician Providers in Oklahoma

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

Compare Radiation Oncology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is CHARLES STEWART, M.D. PH.D.'s specialty?
CHARLES STEWART, M.D. PH.D. specializes in Radiation Oncology Physician and practices in TULSA, Oklahoma. Credentials: M.D. PH.D..
How much does CHARLES STEWART, M.D. PH.D. prescribe under Medicare Part D?
In 2023, CHARLES STEWART, M.D. PH.D. wrote 248 Medicare Part D claims totaling $11K in drug costs for 116 beneficiaries.
What is CHARLES STEWART, M.D. PH.D.'s Medicare quality score?
CHARLES STEWART, M.D. PH.D. has a CMS MIPS Final Score of 93.2246/100 (Quality: 82.4178). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is CHARLES STEWART, M.D. PH.D. located?
CHARLES STEWART, M.D. PH.D. is located at 11212 E 48TH ST, TULSA, OK, 74146. Phone: (918) 497-3715.
What is CHARLES STEWART, M.D. PH.D.'s NPI number?
CHARLES STEWART, M.D. PH.D.'s National Provider Identifier (NPI) is 1043243884, issued on 07/07/2006.
Does CHARLES STEWART, M.D. PH.D. prescribe opioids?
Yes, CHARLES STEWART, M.D. PH.D. had 24 opioid claims in 2023 with an opioid prescribing rate of 9.7%.
How many Radiation Oncology Physician providers are there in the US?
There are 6,018 Radiation Oncology Physician providers across 52 states in the US. The average Radiation Oncology Physician provider writes 186 Medicare Part D claims per year.
What drugs does CHARLES STEWART, M.D. PH.D. prescribe most often?
Based on 2023 Medicare Part D data, CHARLES STEWART, M.D. PH.D.'s most frequently prescribed drugs include Pentoxifylline, Gabapentin, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CHARLES STEWART, M.D. PH.D. accept Medicare?
CHARLES STEWART, M.D. PH.D. appears in CMS Medicare data with 248 Part D claims and 116 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CHARLES STEWART, M.D. PH.D.'s credentials?
CHARLES STEWART, M.D. PH.D.'s NPI is 1043243884 with credentials M.D. PH.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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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