NPI registry status
Active
2026 NPPES data Pulmonary Disease Physician NPI 1043201205 M.D.
Verify on CMS → William Zweig, M.D.
Pulmonary Disease Physician in Saint Louis, Missouri.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 9,323 in Pulmonary Disease Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
3K
Medicare Part D claims · 556 beneficiaries · Pulmonary Disease Physician avg: 1K
Generic prescribing
0%
generic claims · 62% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
83.6/100
▲ 1 pts above national avg 83.1 · Above neutral
Industry payments
$3.3K
149 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
William Zweig, M.D. reported a CMS MIPS final score of 83.6/100 - above the 83.1 national average - and filed 3,102 Medicare Part D claims in 2023.
- 83.6/100
- MIPS score · +1 vs avg
- 3K
- Part D claims, 2023
- 0%
- generic prescribing
- 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.
William Zweig, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
84 42nd percentile higher than 42% of 477,587 scored providers
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
Where William Zweig, M.D. sits
This provider among pulmonary disease physician peers
Across the 2,676 pulmonary disease physician providers who report both Medicare Part D prescribing and a MIPS quality score, William Zweig, M.D. writes more Part D claims than 84% of them and scores higher on MIPS quality than 48% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one pulmonary disease physician peer from a representative sample of 60; the gold marker is William Zweig, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
William Zweig, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 William Zweig, M.D.?
Near national averagePrimary specialty
Pulmonary Disease Physician
Medicare Part D claims
3,102 113% vs specialty avg
MIPS final score
83.6/100 0.5 pts vs avg
Specialty distribution in Missouri
How Pulmonary Disease Physician compares to other specialties among Missouri providers
Medicare quality performance, MIPS
William Zweig, M.D.'s 2023 MIPS final score plotted against the Pulmonary Disease Physician national average
- MIPS Final Score
- 83.6/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Pulmonary Disease Physician) - 83.6/100 vs national avg 83.1
How MIPS and board certification work
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 Zweig, M.D. appears in the CMS NPPES registry as a Pulmonary Disease Physician provider holding M.D. credentials at 11133 DUNN RD, Saint Louis, MO, 63136, with a listed phone of (314) 653-5007. NPI 1043201205 was issued on 11/04/2005.
Medicare Part D records for calendar year 2023 show 3,102 prescription claims written by this provider, covering 556 Medicare beneficiaries and totaling roughly $2.5 million in drug spend, split 62% brand-name and 0% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 83.6/100 for the 2023 performance year (Quality 62, Cost 79.4), compared with the national average of 83.1.
Pulmonary Disease Physician is a mid-sized specialty nationwide, with 9,323 enrolled providers across 53 states and an average of 1,457 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
Provider Details
| NPI | 1043201205 |
|---|---|
| Specialty | Pulmonary Disease Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 11/04/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
83.636
Final Score
Avg: 83.1
62.0413
Quality
79.3984
Cost
Reporting: Group practice
Hospital and facility affiliations
Facilities where William Zweig, M.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.
Pulmonary Consultants Inc
Saint Peters, MO
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 William Zweig, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$3.3K
Largest payer
AstraZeneca Pharmaceuticals LP
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.
Brand vs generic prescribing mix · Brand-heavy
William Zweig, M.D. - brand share 62.0%
Pulmonary Disease Physician average
62% brand-name claims vs 0% generic, on 3,102 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.
3,102
Total Claims
$2.5M
Total Drug Cost
556
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,001
- Total Day Supply
- 108,214
- Brand vs Generic
- 62% brand / 0% generic
- Brand Drug Cost
- $2.4M
- Antibiotic Claims
- 112
Patient Demographics
- Average Patient Age
- 71.3 years
- Avg HCC Risk Score
- 2.25
- Gender Split
- 62% female / 38% male
- Age Distribution
- <65: 119, 65-74: 220, 75-84: 182, 85+: 35
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Zweig, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Albuterol Sulfate …
Albuterol Sulfate Hfa
574 claims
- Trelegy Ellipta
Trelegy Ellipta
439 claims
- Anoro Ellipta
Anoro Ellipta
272 claims
- Breo Ellipta 215
Breo Ellipta
215 claims
- Prednisone 135
Prednisone
135 claims
- Montelukast Sodium 106
Montelukast Sodium
106 claims
- Symbicort 101
Symbicort
101 claims
- Fluticasone Propio… 81
Fluticasone Propionate
81 claims
| Drug | Claims |
|---|---|
| Albuterol Sulfate Hfa Albuterol Sulfate | 574 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 439 |
| Anoro Ellipta Umeclidinium Brm/Vilanterol Tr | 272 |
| Breo Ellipta Fluticasone/Vilanterol | 215 |
| Prednisone | 135 |
| Montelukast Sodium | 106 |
| Symbicort Budesonide/Formoterol Fumarate | 101 |
| Fluticasone Propionate | 81 |
| Ofev Nintedanib Esylate | 76 |
| Stiolto Respimat Tiotropium Br/Olodaterol Hcl | 71 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pulmonary Disease Physician Overview
How William Zweig, M.D. fits within the Pulmonary Disease Physician landscape nationally.
9,323
Pulmonary Disease Physician Providers in US
53
States with Pulmonary Disease Physician
1,457
Avg Claims per Provider
William Zweig, M.D.'s 3,102 claims are above the specialty average of 1,457.
Nearby Pulmonary Disease Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Zweig.
Dr. Asem Abdeljalil
M.D.
Kansas City, MO
Dr. Mohannad Abu Omar
M.D
Saint Joseph, MO
Dr. Tareq Abu Salah
M.D.
Columbia, MO
Dr. Adetayo Ademuyiwa
M.D.
St Louis, MO
Dr. Hamna Ahmad
M.D.
Kansas City, MO
Compare Pulmonary Disease Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Missouri medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Pulmonary Disease Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is William Zweig, M.D.'s specialty? ▼
William Zweig, M.D. specializes in Pulmonary Disease Physician and practices in Saint Louis, Missouri. Credentials: M.D..
How much does William Zweig, M.D. prescribe under Medicare Part D? ▼
In 2023, William Zweig, M.D. wrote 3,102 Medicare Part D claims totaling $2.5M in drug costs for 556 beneficiaries.
What is William Zweig, M.D.'s Medicare quality score? ▼
William Zweig, M.D. has a CMS MIPS Final Score of 83.6/100 (Quality: 62, Cost: 79.4). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is William Zweig, M.D. located? ▼
William Zweig, M.D. is located at 11133 DUNN RD, Saint Louis, MO, 63136. Phone: (314) 653-5007.
What is William Zweig, M.D.'s NPI number? ▼
William Zweig, M.D.'s National Provider Identifier (NPI) is 1043201205, issued on 11/04/2005.
Does William Zweig, M.D. prescribe more brand-name or generic drugs? ▼
William Zweig, M.D.'s prescribing is 62% brand-name and 0% generic drugs by claim count, with $2.4M in brand drug costs.
How many Pulmonary Disease Physician providers are there in the US? ▼
There are 9,323 Pulmonary Disease Physician providers across 53 states in the US. The average Pulmonary Disease Physician provider writes 1,457 Medicare Part D claims per year.
What drugs does William Zweig, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, William Zweig, M.D.'s most frequently prescribed drugs include Albuterol Sulfate Hfa, Trelegy Ellipta, Anoro Ellipta. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Zweig, M.D. accept Medicare? ▼
William Zweig, M.D. appears in CMS Medicare data with 3,102 Part D claims and 556 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Zweig, M.D.'s credentials? ▼
William Zweig, M.D.'s NPI is 1043201205 with credentials M.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
View source datasets and methodology notes
- 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
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.