NPI registry status
Active
2026 NPPES data Pulmonary Disease Physician NPI 1033132816 M.D.
Verify on CMS → William Corrao, M.D.
Pulmonary Disease Physician in Warwick, Rhode Island.
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
456
Medicare Part D claims · 175 beneficiaries · Pulmonary Disease Physician avg: 1K
Generic prescribing
33%
generic claims · 67% brand-name · higher generic rates reduce patient out-of-pocket costs
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 Corrao, M.D. filed 456 Medicare Part D claims in 2023 as a Pulmonary Disease Physician in Warwick, Rhode Island, prescribing 33% generic.
- 456
- Part D claims, 2023
- 33%
- 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 Corrao, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
456 Top 38% higher than 62% of 1,370,886 prescribers
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)
William Corrao, M.D. 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 William Corrao, M.D.?
Quality data not reportedPrimary specialty
Pulmonary Disease Physician
Medicare Part D claims
456 69% vs specialty avg
Specialty distribution in Rhode Island
How Pulmonary Disease Physician compares to other specialties among Rhode Island providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Pulmonary Disease Physician. Verify directly:
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 Corrao, M.D. appears in the CMS NPPES registry as a Pulmonary Disease Physician provider holding M.D. credentials at 455 TOLL GATE RD, Warwick, RI, 02886, with a listed phone of (401) 737-7010. NPI 1033132816 was issued on 07/25/2006.
Medicare Part D records for calendar year 2023 show 456 prescription claims written by this provider, covering 175 Medicare beneficiaries and totaling roughly $206K in drug spend, split 67% brand-name and 33% generic by claim count.
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 | 1033132816 |
|---|---|
| Specialty | Pulmonary Disease Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/25/2006 |
Hospital and facility affiliations
Facilities where William Corrao, 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.
Affinity Physicians LLC.
Warwick, RI
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 · Brand-heavy
William Corrao, M.D. - brand share 67.0%
Pulmonary Disease Physician average
67% brand-name claims vs 33% generic, on 456 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.
456
Total Claims
$206K
Total Drug Cost
175
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 696
- Total Day Supply
- 20,393
- Brand vs Generic
- 67% brand / 33% generic
- Brand Drug Cost
- $199K
- Generic Drug Cost
- $8K
Patient Demographics
- Average Patient Age
- 76.1 years
- Avg HCC Risk Score
- 1.54
- Gender Split
- 70% female / 30% male
- Age Distribution
- <65: 14, 65-74: 55, 75-84: 76, 85+: 30
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Corrao, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Trelegy Ellipta
Trelegy Ellipta
50 claims
- Montelukast Sodium
Montelukast Sodium
46 claims
- Advair Diskus
Advair Diskus
41 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
28 claims
- Breo Ellipta
Breo Ellipta
26 claims
- Symbicort
Symbicort
26 claims
- Stiolto Respimat
Stiolto Respimat
22 claims
- Anoro Ellipta
Anoro Ellipta
21 claims
| Drug | Claims |
|---|---|
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 50 |
| Montelukast Sodium | 46 |
| Advair Diskus Fluticasone Propion/Salmeterol | 41 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 28 |
| Breo Ellipta Fluticasone/Vilanterol | 26 |
| Symbicort Budesonide/Formoterol Fumarate | 26 |
| Stiolto Respimat Tiotropium Br/Olodaterol Hcl | 22 |
| Anoro Ellipta Umeclidinium Brm/Vilanterol Tr | 21 |
| Wixela Inhub Fluticasone Propion/Salmeterol | 17 |
| Ventolin Hfa Albuterol Sulfate | 14 |
* 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 Corrao, 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 Corrao, M.D.'s 456 claims are below the specialty average of 1,457.
Nearby Pulmonary Disease Physician Providers in Rhode Island
Other clinicians with the same primary specialty enrolled in Rhode Island, drawn from the same CMS NPPES roster as Corrao.
Dr. Jason Aliotta
MD
Providence, RI
Dr. Roger Auth
MD
Riverside, RI
Dr. Bashar Bash
M.D.
Wakefield, RI
Dr. Robert Baute
M.D.
Warwick, RI
Dr. Ghada Bourjeily
MD
Providence, RI
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 Rhode Island 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 Corrao, M.D.'s specialty? ▼
William Corrao, M.D. specializes in Pulmonary Disease Physician and practices in Warwick, Rhode Island. Credentials: M.D..
How much does William Corrao, M.D. prescribe under Medicare Part D? ▼
In 2023, William Corrao, M.D. wrote 456 Medicare Part D claims totaling $206K in drug costs for 175 beneficiaries.
Where is William Corrao, M.D. located? ▼
William Corrao, M.D. is located at 455 TOLL GATE RD, Warwick, RI, 02886. Phone: (401) 737-7010.
What is William Corrao, M.D.'s NPI number? ▼
William Corrao, M.D.'s National Provider Identifier (NPI) is 1033132816, issued on 07/25/2006.
Does William Corrao, M.D. prescribe more brand-name or generic drugs? ▼
William Corrao, M.D.'s prescribing is 67% brand-name and 33% generic drugs by claim count, with $199K 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 Corrao, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, William Corrao, M.D.'s most frequently prescribed drugs include Trelegy Ellipta, Montelukast Sodium, Advair Diskus. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Corrao, M.D. accept Medicare? ▼
William Corrao, M.D. appears in CMS Medicare data with 456 Part D claims and 175 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Corrao, M.D.'s credentials? ▼
William Corrao, M.D.'s NPI is 1033132816 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.
- 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.