NPI registry status
Active
2026 NPPES data Allergy & Immunology Physician NPI 1154306850 MD
Verify on CMS → William Corder, MD
Allergy & Immunology Physician in Morgantown, West Virginia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 3,390 in Allergy & Immunology 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
838
Medicare Part D claims · 142 beneficiaries · Allergy & Immunology Physician avg: 764
Generic prescribing
74%
generic claims · 26% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
94.9/100
▲ 12 pts above national avg 83.1 · Exceptional
Industry payments
$459.25
17 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 Corder, MD reported a CMS MIPS final score of 94.9/100 - above the 83.1 national average - and filed 838 Medicare Part D claims in 2023.
- 94.9/100
- MIPS score · +12 vs avg
- 838
- Part D claims, 2023
- 74%
- 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 Corder, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
95 Top 25% higher than 75% 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 Corder, MD sits
This provider among allergy & immunology physician peers
Across the 740 allergy & immunology physician providers who report both Medicare Part D prescribing and a MIPS quality score, William Corder, MD writes more Part D claims than 53% of them and scores higher on MIPS quality than 83% - placing this provider in the high-volume, high-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 allergy & immunology physician peer from a representative sample of 60; the gold marker is William Corder, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
William Corder, 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 William Corder, MD?
High performer (top quartile)Primary specialty
Allergy & Immunology Physician
Medicare Part D claims
838 10% vs specialty avg
MIPS final score
94.9/100 11.8 pts vs avg
Specialty distribution in West Virginia
How Allergy & Immunology Physician compares to other specialties among West Virginia providers
Medicare quality performance, MIPS
William Corder, MD's 2023 MIPS final score plotted against the Allergy & Immunology Physician national average
- MIPS Final Score
- 94.9/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Allergy & Immunology Physician) - 94.9/100 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 Corder, MD appears in the CMS NPPES registry as a Allergy & Immunology Physician provider holding MD credentials at 165 SCOTT AVE, Morgantown, WV, 26508, with a listed phone of (304) 554-0440. NPI 1154306850 was issued on 12/14/2005.
Medicare Part D records for calendar year 2023 show 838 prescription claims written by this provider, covering 142 Medicare beneficiaries and totaling roughly $142K in drug spend, split 26% brand-name and 74% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 94.9/100 for the 2023 performance year, compared with the national average of 83.1.
Allergy & Immunology Physician is a narrow specialty nationwide, with 3,390 enrolled providers across 52 states and an average of 764 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 | 1154306850 |
|---|---|
| Specialty | Allergy & Immunology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 12/14/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
94.9
Final Score
Avg: 83.1
94
Promoting Interoperability
Reporting: Group practice
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 Corder, MD. Source: openpaymentsdata.cms.gov.
Total received
$459
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 · Above average
William Corder, MD - brand share 26.0%
Allergy & Immunology Physician average
26% brand-name claims vs 74% generic, on 838 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.
838
Total Claims
$142K
Total Drug Cost
142
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,598
- Total Day Supply
- 46,799
- Brand vs Generic
- 26% brand / 74% generic
- Brand Drug Cost
- $120K
- Generic Drug Cost
- $21K
Patient Demographics
- Average Patient Age
- 69.7 years
- Avg HCC Risk Score
- 0.98
- Gender Split
- 61% female / 39% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Corder, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Azelastine Hcl
Azelastine Hcl
163 claims
- Montelukast Sodium
Montelukast Sodium
121 claims
- Fluticasone Propio…
Fluticasone Propionate
110 claims
- Levocetirizine Dih… 63
Levocetirizine Dihydrochloride
63 claims
- Symbicort 58
Symbicort
58 claims
- Albuterol Sulfate … 43
Albuterol Sulfate Hfa
43 claims
- Hydroxyzine Hcl 38
Hydroxyzine Hcl
38 claims
- Flovent Hfa 23
Flovent Hfa
23 claims
| Drug | Claims |
|---|---|
| Azelastine Hcl | 163 |
| Montelukast Sodium | 121 |
| Fluticasone Propionate | 110 |
| Levocetirizine Dihydrochloride | 63 |
| Symbicort Budesonide/Formoterol Fumarate | 58 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 43 |
| Hydroxyzine Hcl | 38 |
| Flovent Hfa Fluticasone Propionate | 23 |
| Famotidine | 21 |
| Epinephrine | 18 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Allergy & Immunology Physician Overview
How William Corder, MD fits within the Allergy & Immunology Physician landscape nationally.
3,390
Allergy & Immunology Physician Providers in US
52
States with Allergy & Immunology Physician
764
Avg Claims per Provider
William Corder, MD's 838 claims are above the specialty average of 764.
Nearby Allergy & Immunology Physician Providers in West Virginia
Other clinicians with the same primary specialty enrolled in West Virginia, drawn from the same CMS NPPES roster as Corder.
Dr. Chang Choi
MD
Charleston, WV
Dr. Steven Coutras
M.D.
Morgantown, WV
Dr. Isabel Deltoro Gordinho
M.D.
Beckley, WV
Dr. David Goetz
M.D.
Morgantown, WV
Dr. Ashley Grimmett
PAC
Scott Depot, WV
Compare Allergy & Immunology 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 West Virginia medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Allergy & Immunology 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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Explore West Virginia
Frequently Asked Questions
What is William Corder, MD's specialty? ▼
William Corder, MD specializes in Allergy & Immunology Physician and practices in Morgantown, West Virginia. Credentials: MD.
How much does William Corder, MD prescribe under Medicare Part D? ▼
In 2023, William Corder, MD wrote 838 Medicare Part D claims totaling $142K in drug costs for 142 beneficiaries.
What is William Corder, MD's Medicare quality score? ▼
William Corder, MD has a CMS MIPS Final Score of 94.9/100. The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is William Corder, MD located? ▼
William Corder, MD is located at 165 SCOTT AVE, Morgantown, WV, 26508. Phone: (304) 554-0440.
What is William Corder, MD's NPI number? ▼
William Corder, MD's National Provider Identifier (NPI) is 1154306850, issued on 12/14/2005.
Does William Corder, MD prescribe more brand-name or generic drugs? ▼
William Corder, MD's prescribing is 26% brand-name and 74% generic drugs by claim count, with $120K in brand drug costs.
How many Allergy & Immunology Physician providers are there in the US? ▼
There are 3,390 Allergy & Immunology Physician providers across 52 states in the US. The average Allergy & Immunology Physician provider writes 764 Medicare Part D claims per year.
What drugs does William Corder, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, William Corder, MD's most frequently prescribed drugs include Azelastine Hcl, Montelukast Sodium, Fluticasone Propionate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Corder, MD accept Medicare? ▼
William Corder, MD appears in CMS Medicare data with 838 Part D claims and 142 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Corder, MD's credentials? ▼
William Corder, MD's NPI is 1154306850 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
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.