NPI registry status
Active
2026 NPPES data Gerontology Nurse Practitioner NPI 1366691297 NP
Verify on CMS → Mary Breen, NP
Gerontology Nurse Practitioner in East Boston, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 9,706 in Gerontology 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
4K
Medicare Part D claims · 311 beneficiaries · Gerontology Nurse Practitioner avg: 1K
Generic prescribing
82%
generic claims · 16% 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
Mary Breen, NP filed 3,932 Medicare Part D claims in 2023 as a Gerontology Nurse Practitioner in East Boston, Massachusetts, prescribing 82% generic.
- 4K
- Part D claims, 2023
- 82%
- 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.
Mary Breen, NP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,932 Top 9% higher than 91% 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 Mary Breen, NP?
Quality data not reportedPrimary specialty
Gerontology Nurse Practitioner
Medicare Part D claims
3,932 206% vs specialty avg
Specialty distribution in Massachusetts
How Gerontology Nurse Practitioner compares to other specialties among Massachusetts 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 Gerontology 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).
Mary Breen, NP appears in the CMS NPPES registry as a Gerontology Nurse Practitioner provider holding NP credentials at 10 GOVE ST, East Boston, MA, 02128, with a listed phone of (617) 569-5800. NPI 1366691297 was issued on 09/16/2008.
Medicare Part D records for calendar year 2023 show 3,932 prescription claims written by this provider, covering 311 Medicare beneficiaries and totaling roughly $415K in drug spend, split 16% brand-name and 82% generic by claim count, with an opioid prescribing rate of 1.0%.
Gerontology Nurse Practitioner is a mid-sized specialty nationwide, with 9,706 enrolled providers across 54 states and an average of 1,283 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 | 1366691297 |
|---|---|
| Specialty | Gerontology Nurse Practitioner |
| Credentials | NP |
| Gender | Female |
| NPI Issued | 09/16/2008 |
License & disciplinary context - Massachusetts BORIM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Mary Breen, NP. To verify Mary Breen, NP's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Mary Breen, NP - brand share 16.0%
Gerontology Nurse Practitioner average
16% brand-name claims vs 82% generic, on 3,932 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.
3,932
Total Claims
$415K
Total Drug Cost
311
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,890
- Total Day Supply
- 168,542
- Brand vs Generic
- 16% brand / 82% generic
- Brand Drug Cost
- $358K
- Generic Drug Cost
- $53K
- Opioid Claims
- 40 (1.0% rate)
- Antibiotic Claims
- 22
Patient Demographics
- Average Patient Age
- 77.7 years
- Avg HCC Risk Score
- 1.69
- Gender Split
- 71% female / 29% male
- Age Distribution
- <65: 0, 65-74: 105, 75-84: 149, 85+: 57
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mary Breen, NP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
229 claims
- Amlodipine Besylate
Amlodipine Besylate
199 claims
- Diclofenac Sodium
Diclofenac Sodium
167 claims
- Omeprazole
Omeprazole
163 claims
- Lisinopril
Lisinopril
151 claims
- Gabapentin
Gabapentin
127 claims
- Fluticasone Propio…
Fluticasone Propionate
105 claims
- Metoprolol Succinate
Metoprolol Succinate
102 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 229 |
| Amlodipine Besylate | 199 |
| Diclofenac Sodium | 167 |
| Omeprazole | 163 |
| Lisinopril | 151 |
| Gabapentin | 127 |
| Fluticasone Propionate | 105 |
| Metoprolol Succinate | 102 |
| Metformin Hcl | 86 |
| Famotidine | 81 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gerontology Nurse Practitioner Overview
How Mary Breen, NP fits within the Gerontology Nurse Practitioner landscape nationally.
9,706
Gerontology Nurse Practitioner Providers in US
54
States with Gerontology Nurse Practitioner
1,283
Avg Claims per Provider
Mary Breen, NP's 3,932 claims are above the specialty average of 1,283.
Nearby Gerontology Nurse Practitioner Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Breen.
Dr. Julie Abert
NP
Feeding Hills, MA
Dr. Francisca Adams
MSN, APRN, BC
Waltham, MA
Jeanne Adrien
Danvers, MA
Dr. Steven Afrow
NP
Boston, MA
Dr. Nadege Alce
RN
Rockland, MA
Compare Gerontology 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 Massachusetts medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gerontology 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 Mary Breen, NP's specialty? ▼
Mary Breen, NP specializes in Gerontology Nurse Practitioner and practices in East Boston, Massachusetts. Credentials: NP.
How much does Mary Breen, NP prescribe under Medicare Part D? ▼
In 2023, Mary Breen, NP wrote 3,932 Medicare Part D claims totaling $415K in drug costs for 311 beneficiaries.
Where is Mary Breen, NP located? ▼
Mary Breen, NP is located at 10 GOVE ST, East Boston, MA, 02128. Phone: (617) 569-5800.
What is Mary Breen, NP's NPI number? ▼
Mary Breen, NP's National Provider Identifier (NPI) is 1366691297, issued on 09/16/2008.
Does Mary Breen, NP prescribe more brand-name or generic drugs? ▼
Mary Breen, NP's prescribing is 16% brand-name and 82% generic drugs by claim count, with $358K in brand drug costs.
Does Mary Breen, NP prescribe opioids? ▼
Yes, Mary Breen, NP had 40 opioid claims in 2023 with an opioid prescribing rate of 1.0%.
How many Gerontology Nurse Practitioner providers are there in the US? ▼
There are 9,706 Gerontology Nurse Practitioner providers across 54 states in the US. The average Gerontology Nurse Practitioner provider writes 1,283 Medicare Part D claims per year.
What drugs does Mary Breen, NP prescribe most often? ▼
Based on 2023 Medicare Part D data, Mary Breen, NP's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Diclofenac Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mary Breen, NP accept Medicare? ▼
Mary Breen, NP appears in CMS Medicare data with 3,932 Part D claims and 311 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mary Breen, NP's credentials? ▼
Mary Breen, NP's NPI is 1366691297 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.
- 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.