NPI registry status
Active
2026 NPPES data Gynecology Physician NPI 1851687446 MD
Verify on CMS → Amy Bregar, MD
Gynecology Physician in 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 3,912 in Gynecology 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
135
Medicare Part D claims · 35 beneficiaries · Gynecology Physician avg: 319
Generic prescribing
70%
generic claims · 30% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$11.3K
2 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Amy Bregar, MD filed 135 Medicare Part D claims in 2024 as a Gynecology Physician in Boston, Massachusetts, prescribing 70% generic.
- 135
- Part D claims, 2024
- 70%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥34th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Amy Bregar, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1851687446), first enumerated 06/22/2011.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 135 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
3 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$11.3K in reported industry payments (2 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Amy Bregar, MD's individual license status. Verify directly with the state medical board.
Source: BORIM annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1851687446 · Gynecology Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1851687446
- ENUM-MID 2011
- TAX-NARROW 3,912
- RX-LIGHT 135
- BOOK-THIN 129 in Massachusetts
- PHOTO-ENUM Whitney Cook, M.D. · 2011
Amy Bregar, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
135 ≥ 34th percentile 34% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Amy Bregar, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 3 hospital affiliations - 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 Amy Bregar, MD?
Quality data not reportedPrimary specialty
Gynecology Physician
Medicare Part D claims
135 58% vs specialty avg
Specialty distribution in Massachusetts
How Gynecology Physician 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 Gynecology 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).
Practice Address
Provider Details
| NPI | 1851687446 |
|---|---|
| Specialty | Gynecology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 06/22/2011 |
Hospital and facility affiliations
Facilities where Amy Bregar, MD 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.
According to CMS billing records, Amy Bregar, MD is affiliated with 3 Medicare-billing facilities across 2 states.
Massachusetts General Physicians Organization Inc
Boston, MA
The General Hospital Corporation
Boston, MA
Wentworth Douglass Physician Corporation
Dover, NH
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Amy Bregar, MD. Source: openpaymentsdata.cms.gov.
Total received
$11.3K
Largest payer
Stryker Corporation
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.
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 Amy Bregar, MD. To verify Amy Bregar, MD'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 · Above average
Amy Bregar, MD - brand share 30.0%
Gynecology Physician average
30% brand-name claims vs 70% generic, on 135 2024 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 2024.
135
Total Claims
$2K
Total Drug Cost
35
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 159.133
- Total Day Supply
- 2,166
- Brand vs Generic
- 30% brand / 70% generic
- Brand Drug Cost
- $762
- Generic Drug Cost
- $1K
- Opioid Claims
- 12 (8.9% rate)
- Antibiotic Claims
- 12
Patient Demographics
- Average Patient Age
- 70.4 years
- Avg HCC Risk Score
- 1.41
- Gender Split
- 100% female / 0% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Sodium Chloride 0.9 % Sodium Chloride | 39 |
| Oxycodone Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gynecology Physician Overview
How Amy Bregar, MD fits within the Gynecology Physician landscape nationally.
3,912
Gynecology Physician Providers in US
53
States with Gynecology Physician
319
Avg Claims per Provider
Amy Bregar, MD's 135 claims are below the specialty average of 319.
Nationwide Gynecology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Bregar, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2011)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Gynecology Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Bregar.
One of 129 Gynecology Physician providers enrolled in Massachusetts, 5 are shown here.
Dr. Richard Abisla
MD
Falmouth, MA
Dr. Alan Altman
M.D.
Brookline, MA
Dr. Rachel Ashby
MD
Boston, MA
Dr. Deborah Bartz
M.D.
Roxbury Crossing, MA
Dr. Laurel Bauer
MD
Beverly, MA
Compare Gynecology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Amy Bregar, MD's specialty? ▼
Amy Bregar, MD specializes in Gynecology Physician and practices in Boston, Massachusetts. Credentials: MD.
How much does Amy Bregar, MD prescribe under Medicare Part D? ▼
In 2024, Amy Bregar, MD wrote 135 Medicare Part D claims totaling $2K in drug costs for 35 beneficiaries.
Where is Amy Bregar, MD located? ▼
Amy Bregar, MD is located at MASSACHUSETTS GENERAL HOSPITAL, Boston, MA, 02114. Phone: (617) 724-4800.
What is Amy Bregar, MD's NPI number? ▼
Amy Bregar, MD's National Provider Identifier (NPI) is 1851687446, issued on 06/22/2011.
Does Amy Bregar, MD prescribe more brand-name or generic drugs? ▼
Amy Bregar, MD's prescribing is 30% brand-name and 70% generic drugs by claim count, with $762 in brand drug costs.
Does Amy Bregar, MD prescribe opioids? ▼
Yes, Amy Bregar, MD had 12 opioid claims in 2024 with an opioid prescribing rate of 8.9%.
How many Gynecology Physician providers are there in the US? ▼
There are 3,912 Gynecology Physician providers across 53 states in the US. The average Gynecology Physician provider writes 319 Medicare Part D claims per year.
What drugs does Amy Bregar, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Amy Bregar, MD's most frequently prescribed drugs include Sodium Chloride, Oxycodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Amy Bregar, MD accept Medicare? ▼
Amy Bregar, MD appears in CMS Medicare data with 135 Part D claims and 35 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Amy Bregar, MD's credentials? ▼
Amy Bregar, MD's NPI is 1851687446 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.