NPI registry status
Active
2026 NPPES data Psychiatric/Mental Health Nurse Practitioner NPI 1790415594 NP
Verify on CMS → William Seymour, NP
Psychiatric/Mental Health Nurse Practitioner in Westbrook, Maine.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 40,776 in Psychiatric/Mental Health Nurse Practitioner, 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
1K
Medicare Part D claims · 106 beneficiaries · Psychiatric/Mental Health Nurse Practitioner avg: 927
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
98.1/100
▲ 15 pts above national avg 83.1 · Exceptional
Industry payments
$30
1 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 Seymour, NP reported a CMS MIPS final score of 98.1/100 - above the 83.1 national average - and filed 1,384 Medicare Part D claims in 2023.
- 98.1/100
- MIPS score · +15 vs avg
- 1K
- Part D claims, 2023
- 94%
- generic prescribing
- $30
- industry payments (Sunshine Act)
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 Seymour, NP's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
98 Top 11% higher than 89% 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 Seymour, NP sits
This provider among psychiatric/mental health nurse practitioner peers
Across the 1,917 psychiatric/mental health nurse practitioner providers who report both Medicare Part D prescribing and a MIPS quality score, William Seymour, NP writes more Part D claims than 70% of them and scores higher on MIPS quality than 88% - 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 psychiatric/mental health nurse practitioner peer from a representative sample of 60; the gold marker is William Seymour, NP. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about William Seymour, NP?
High performer (top quartile)Primary specialty
Psychiatric/Mental Health Nurse Practitioner
Medicare Part D claims
1,384 49% vs specialty avg
MIPS final score
98.1/100 15 pts vs avg
Specialty distribution in Maine
How Psychiatric/Mental Health Nurse Practitioner compares to other specialties among Maine providers
Medicare quality performance, MIPS
William Seymour, NP's 2023 MIPS final score plotted against the Psychiatric/Mental Health Nurse Practitioner national average
- MIPS Final Score
- 98.1/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Psychiatric/Mental Health Nurse Practitioner) - 98.1/100 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 Seymour, NP appears in the CMS NPPES registry as a Psychiatric/Mental Health Nurse Practitioner provider holding NP credentials at 123 ANDOVER RD, Westbrook, ME, 04092, with a listed phone of (207) 761-2200. NPI 1790415594 was issued on 06/14/2022.
Medicare Part D records for calendar year 2023 show 1,384 prescription claims written by this provider, covering 106 Medicare beneficiaries and totaling roughly $345K in drug spend, split 6% brand-name and 94% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 98.1/100 for the 2023 performance year (Quality 86.1), compared with the national average of 83.1.
Psychiatric/Mental Health Nurse Practitioner is a mid-sized specialty nationwide, with 40,776 enrolled providers across 54 states and an average of 927 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 | 1790415594 |
|---|---|
| Specialty | Psychiatric/Mental Health Nurse Practitioner |
| Credentials | NP |
| Gender | Male |
| NPI Issued | 06/14/2022 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
98.0699
Final Score
Avg: 83.1
86.1398
Quality
100
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 William Seymour, NP. Source: openpaymentsdata.cms.gov.
Total received
$30
Largest payer
Supernus Pharmaceuticals, 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.
Brand vs generic prescribing mix · Generic-heavy
William Seymour, NP - brand share 6.0%
Psychiatric/Mental Health Nurse Practitioner average
6% brand-name claims vs 94% generic, on 1,384 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.
1,384
Total Claims
$345K
Total Drug Cost
106
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,877
- Total Day Supply
- 55,045
- Brand vs Generic
- 6% brand / 94% generic
- Brand Drug Cost
- $286K
- Generic Drug Cost
- $59K
Patient Demographics
- Average Patient Age
- 58.4 years
- Avg HCC Risk Score
- 1.01
- Gender Split
- 61% female / 39% male
- Age Distribution
- <65: 65, 65-74: 33, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Seymour, NP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Clonazepam
Clonazepam
104 claims
- Lamotrigine
Lamotrigine
85 claims
- Quetiapine Fumarate
Quetiapine Fumarate
76 claims
- Trazodone Hcl
Trazodone Hcl
71 claims
- Bupropion Xl
Bupropion Xl
54 claims
- Duloxetine Hcl
Duloxetine Hcl
42 claims
- Mirtazapine
Mirtazapine
42 claims
- Risperidone 39
Risperidone
39 claims
| Drug | Claims |
|---|---|
| Clonazepam | 104 |
| Lamotrigine | 85 |
| Quetiapine Fumarate | 76 |
| Trazodone Hcl | 71 |
| Bupropion Xl Bupropion Hcl | 54 |
| Duloxetine Hcl | 42 |
| Mirtazapine | 42 |
| Risperidone | 39 |
| Gabapentin | 38 |
| Naltrexone Hcl | 38 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Psychiatric/Mental Health Nurse Practitioner in ME →
All providers in Maine →
Compare specialties →
Psychiatric/Mental Health Nurse Practitioner Overview
How William Seymour, NP fits within the Psychiatric/Mental Health Nurse Practitioner landscape nationally.
40,776
Psychiatric/Mental Health Nurse Practitioner Providers in US
54
States with Psychiatric/Mental Health Nurse Practitioner
927
Avg Claims per Provider
William Seymour, NP's 1,384 claims are above the specialty average of 927.
Nearby Psychiatric/Mental Health Nurse Practitioner Providers in Maine
Other clinicians with the same primary specialty enrolled in Maine, drawn from the same CMS NPPES roster as Seymour.
Dr. Amanda Adamen
PMHNP
Bethel, ME
Dr. Kristen Aleva
APRN
Eliot, ME
Dr. Suzanne Alexis
PMHNP-BC
Farmington, ME
Dr. Claudine Allen
PMHNP
Bangor, ME
Sara Anderson
Brunswick, ME
Compare Psychiatric/Mental Health Nurse Practitioner 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 Maine medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Psychiatric/Mental Health Nurse Practitioner 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Maine
Frequently Asked Questions
What is William Seymour, NP's specialty? ▼
William Seymour, NP specializes in Psychiatric/Mental Health Nurse Practitioner and practices in Westbrook, Maine. Credentials: NP.
How much does William Seymour, NP prescribe under Medicare Part D? ▼
In 2023, William Seymour, NP wrote 1,384 Medicare Part D claims totaling $345K in drug costs for 106 beneficiaries.
What is William Seymour, NP's Medicare quality score? ▼
William Seymour, NP has a CMS MIPS Final Score of 98.1/100 (Quality: 86.1). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is William Seymour, NP located? ▼
William Seymour, NP is located at 123 ANDOVER RD, Westbrook, ME, 04092. Phone: (207) 761-2200.
What is William Seymour, NP's NPI number? ▼
William Seymour, NP's National Provider Identifier (NPI) is 1790415594, issued on 06/14/2022.
Does William Seymour, NP prescribe more brand-name or generic drugs? ▼
William Seymour, NP's prescribing is 6% brand-name and 94% generic drugs by claim count, with $286K in brand drug costs.
How many Psychiatric/Mental Health Nurse Practitioner providers are there in the US? ▼
There are 40,776 Psychiatric/Mental Health Nurse Practitioner providers across 54 states in the US. The average Psychiatric/Mental Health Nurse Practitioner provider writes 927 Medicare Part D claims per year.
What drugs does William Seymour, NP prescribe most often? ▼
Based on 2023 Medicare Part D data, William Seymour, NP's most frequently prescribed drugs include Clonazepam, Lamotrigine, Quetiapine Fumarate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Seymour, NP accept Medicare? ▼
William Seymour, NP appears in CMS Medicare data with 1,384 Part D claims and 106 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Seymour, NP's credentials? ▼
William Seymour, NP's NPI is 1790415594 with credentials NP. 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.