NPI registry status
Active
2026 NPPES data Family Nurse Practitioner NPI 1689311623 MSN, FNP-C
Verify on CMS → Maggie Buell, MSN, FNP-C
Family Nurse Practitioner in East Greenwich, 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 209,817 in Family 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
589
Medicare Part D claims · 431 beneficiaries · Family Nurse Practitioner avg: 1K
Generic prescribing
92%
generic claims · 5% 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
Maggie Buell, MSN, FNP-C filed 589 Medicare Part D claims in 2023 as a Family Nurse Practitioner in East Greenwich, Rhode Island, prescribing 92% generic.
- 589
- Part D claims, 2023
- 92%
- generic prescribing
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.
Maggie Buell, MSN, FNP-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
589 Top 34% higher than 66% 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
What does the federal data show about Maggie Buell, MSN, FNP-C?
Quality data not reportedPrimary specialty
Family Nurse Practitioner
Medicare Part D claims
589 52% vs specialty avg
Specialty distribution in Rhode Island
How Family Nurse Practitioner 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 Family Nurse Practitioner. 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).
Maggie Buell, MSN, FNP-C appears in the CMS NPPES registry as a Family Nurse Practitioner provider holding MSN, FNP-C credentials at 3461 S COUNTY TRL, East Greenwich, RI, 02818, with a listed phone of (401) 471-6740. NPI 1689311623 was issued on 05/19/2022.
Medicare Part D records for calendar year 2023 show 589 prescription claims written by this provider, covering 431 Medicare beneficiaries and totaling roughly $7K in drug spend, split 5% brand-name and 92% generic by claim count.
Family Nurse Practitioner is a high-volume specialty nationwide, with 209,817 enrolled providers across 56 states and an average of 1,222 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 | 1689311623 |
|---|---|
| Specialty | Family Nurse Practitioner |
| Credentials | MSN, FNP-C |
| Gender | Female |
| NPI Issued | 05/19/2022 |
Hospital and facility affiliations
Facilities where Maggie Buell, MSN, FNP-C 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.
Silver Spring Health Care Management Inc
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 · Generic-heavy
Maggie Buell, MSN, FNP-C - brand share 5.0%
Family Nurse Practitioner average
5% brand-name claims vs 92% generic, on 589 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.
589
Total Claims
$7K
Total Drug Cost
431
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 590
- Total Day Supply
- 5,360
- Brand vs Generic
- 5% brand / 92% generic
- Brand Drug Cost
- $747
- Generic Drug Cost
- $6K
- Antibiotic Claims
- 322
Patient Demographics
- Average Patient Age
- 72.8 years
- Avg HCC Risk Score
- 0.92
- Gender Split
- 63% female / 37% male
- Age Distribution
- <65: 35, 65-74: 218, 75-84: 148, 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 Maggie Buell, MSN, FNP-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Cephalexin
Cephalexin
85 claims
- Doxycycline Hyclate
Doxycycline Hyclate
84 claims
- Prednisone
Prednisone
61 claims
- Amoxicillin-Clavul…
Amoxicillin-Clavulanate Potass
55 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
46 claims
- Azithromycin
Azithromycin
40 claims
- Methylprednisolone
Methylprednisolone
34 claims
- Nitrofurantoin Mon… 23
Nitrofurantoin Mono-Macro
23 claims
| Drug | Claims |
|---|---|
| Cephalexin | 85 |
| Doxycycline Hyclate | 84 |
| Prednisone | 61 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 55 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 46 |
| Azithromycin | 40 |
| Methylprednisolone | 34 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 23 |
| Paxlovid (Eua) Nirmatrelvir/Ritonavir | 18 |
| Triamcinolone Acetonide | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Nurse Practitioner Overview
How Maggie Buell, MSN, FNP-C fits within the Family Nurse Practitioner landscape nationally.
209,817
Family Nurse Practitioner Providers in US
56
States with Family Nurse Practitioner
1,222
Avg Claims per Provider
Maggie Buell, MSN, FNP-C's 589 claims are below the specialty average of 1,222.
Nearby Family Nurse Practitioner Providers in Rhode Island
Other clinicians with the same primary specialty enrolled in Rhode Island, drawn from the same CMS NPPES roster as Buell.
Dr. Allison Abbott
NP
Providence, RI
Dr. Eleanor Aben
NP
Westerly, RI
Chinyere Abii
Woonsocket, RI
Dr. Olajumoke Adetunji
DNP APRN FNP-BC
Warwick, RI
Dr. Mofoluso Agbelese
DNP
Providence, RI
Compare Family 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 Rhode Island medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Family 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.
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Frequently Asked Questions
What is Maggie Buell, MSN, FNP-C's specialty? ▼
Maggie Buell, MSN, FNP-C specializes in Family Nurse Practitioner and practices in East Greenwich, Rhode Island. Credentials: MSN, FNP-C.
How much does Maggie Buell, MSN, FNP-C prescribe under Medicare Part D? ▼
In 2023, Maggie Buell, MSN, FNP-C wrote 589 Medicare Part D claims totaling $7K in drug costs for 431 beneficiaries.
Where is Maggie Buell, MSN, FNP-C located? ▼
Maggie Buell, MSN, FNP-C is located at 3461 S COUNTY TRL, East Greenwich, RI, 02818. Phone: (401) 471-6740.
What is Maggie Buell, MSN, FNP-C's NPI number? ▼
Maggie Buell, MSN, FNP-C's National Provider Identifier (NPI) is 1689311623, issued on 05/19/2022.
Does Maggie Buell, MSN, FNP-C prescribe more brand-name or generic drugs? ▼
Maggie Buell, MSN, FNP-C's prescribing is 5% brand-name and 92% generic drugs by claim count, with $747 in brand drug costs.
How many Family Nurse Practitioner providers are there in the US? ▼
There are 209,817 Family Nurse Practitioner providers across 56 states in the US. The average Family Nurse Practitioner provider writes 1,222 Medicare Part D claims per year.
What drugs does Maggie Buell, MSN, FNP-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Maggie Buell, MSN, FNP-C's most frequently prescribed drugs include Cephalexin, Doxycycline Hyclate, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Maggie Buell, MSN, FNP-C accept Medicare? ▼
Maggie Buell, MSN, FNP-C appears in CMS Medicare data with 589 Part D claims and 431 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Maggie Buell, MSN, FNP-C's credentials? ▼
Maggie Buell, MSN, FNP-C's NPI is 1689311623 with credentials MSN, FNP-C. 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.