2026 NPPES data Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician NPI 1639236011 MD
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BRETT WILLIAMS, MD

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in GREAT FALLS, Montana. 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
254
Medicare Part D claims · 89 beneficiaries · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician avg: 128
MIPS score
87.2607/100
▲ 4 pts above national avg 83.1 · [object Object]
Industry payments
$119
2 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

BRETT WILLIAMS, MD reported a CMS MIPS final score of 87.2607/100 — above the 83.1 national average — and filed 254 Medicare Part D claims in 2023.

87.2607/100
MIPS score · +4 vs avg
254
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.

BRETT WILLIAMS, MD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

87 Top 46% higher than 54% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). This entry sits in this band. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023

Board certification likely (heuristic — not verified)

BRETT WILLIAMS, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting — 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 BRETT WILLIAMS, MD?

High performer (top quartile)

NPI registry status

Active

Issued 01/03/2007

NPI 1639236011

Primary specialty

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician

Mid-sized

5,062 US NPIs in this specialty

Medicare Part D claims

254 98% vs specialty avg

2023 prescription claims

Specialty avg: 128

MIPS final score

87.2607/100 4.160700000000006% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Montana

How Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician compares to other specialties among Montana providers

Montana providers

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician share within Montana

1. Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician share within Montana

Medicare quality performance — MIPS

BRETT WILLIAMS, MD's 2023 MIPS final score plotted against the Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician national average

High performer (top quartile)
MIPS Final Score
87.2607/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician) — 87.2607/100 vs national avg 83.1

0%100%National avg83%87.3%
MIPS final score (Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician) — 87.2607/100 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).

BRETT WILLIAMS, MD is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider practicing in GREAT FALLS, Montana, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1639236011. 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.

BRETT WILLIAMS, MD appears in the CMS NPPES registry as a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider holding MD credentials at 1300 28TH STREET SOUTH, GREAT FALLS, MT, 59405, with a listed phone of (406) 761-6500. NPI 1639236011 was issued on 01/03/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WILLIAMS 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 254 prescription claims written by this provider, covering 89 Medicare beneficiaries and totaling roughly $8K in drug spend, with an opioid prescribing rate of 18.5%. 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 87.2607/100 for the 2023 performance year (Quality 82.973), compared with the national average of 83.1.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician is a mid-sized specialty nationwide, with 5,062 enrolled providers across 52 states and an average of 128 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

1300 28TH STREET SOUTH
GREAT FALLS, MT 59405

Provider Details

NPI 1639236011
Specialty Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
Credentials MD
Gender Male
NPI Issued 01/03/2007

CMS Quality Score (MIPS)

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

87.2607
Final Score
Avg: 83.1
82.973
Quality
85.9138
Promoting Interoperability

Reporting: Alternative Payment Model

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 BRETT WILLIAMS, MD. Source: openpaymentsdata.cms.gov.

Total received

$119

Largest payer

Medtronic, 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.

254
Total Claims
$8K
Total Drug Cost
89
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
345
Total Day Supply
7,912
Generic Drug Cost
$3K
Opioid Claims
47 (18.5% rate)

Patient Demographics

Average Patient Age
75.2 years
Avg HCC Risk Score
1.45
Gender Split
54% female / 46% 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
Chlorhexidine Gluconate
60
Clopidogrel
Clopidogrel Bisulfate
50
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
35
Cilostazol
29

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

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Overview

How BRETT WILLIAMS, MD fits within the Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician landscape nationally.

5,062
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Providers in US
52
States with Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
128
Avg Claims per Provider

BRETT WILLIAMS, MD's 254 claims are above the specialty average of 128.

Nearby Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Providers in Montana

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

Compare Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is BRETT WILLIAMS, MD's specialty?
BRETT WILLIAMS, MD specializes in Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician and practices in GREAT FALLS, Montana. Credentials: MD.
How much does BRETT WILLIAMS, MD prescribe under Medicare Part D?
In 2023, BRETT WILLIAMS, MD wrote 254 Medicare Part D claims totaling $8K in drug costs for 89 beneficiaries.
What is BRETT WILLIAMS, MD's Medicare quality score?
BRETT WILLIAMS, MD has a CMS MIPS Final Score of 87.2607/100 (Quality: 82.973). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is BRETT WILLIAMS, MD located?
BRETT WILLIAMS, MD is located at 1300 28TH STREET SOUTH, GREAT FALLS, MT, 59405. Phone: (406) 761-6500.
What is BRETT WILLIAMS, MD's NPI number?
BRETT WILLIAMS, MD's National Provider Identifier (NPI) is 1639236011, issued on 01/03/2007.
Does BRETT WILLIAMS, MD prescribe opioids?
Yes, BRETT WILLIAMS, MD had 47 opioid claims in 2023 with an opioid prescribing rate of 18.5%.
How many Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers are there in the US?
There are 5,062 Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers across 52 states in the US. The average Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider writes 128 Medicare Part D claims per year.
What drugs does BRETT WILLIAMS, MD prescribe most often?
Based on 2023 Medicare Part D data, BRETT WILLIAMS, MD's most frequently prescribed drugs include Chlorhexidine Gluconate, Clopidogrel, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does BRETT WILLIAMS, MD accept Medicare?
BRETT WILLIAMS, MD appears in CMS Medicare data with 254 Part D claims and 89 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify BRETT WILLIAMS, MD's credentials?
BRETT WILLIAMS, MD's NPI is 1639236011 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.
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