NPI registry status
Active
2026 NPPES data Allergy Physician NPI 1437362993 M.D.
Verify on CMS → Caroline McFadden, M.D.
Allergy Physician in Somerville, 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 1,019 in Allergy 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
276
Medicare Part D claims · 66 beneficiaries · Allergy Physician avg: 755
Generic prescribing
66%
generic claims · 34% 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
Caroline McFadden, M.D. filed 276 Medicare Part D claims in 2023 as a Allergy Physician in Somerville, Massachusetts, prescribing 66% generic.
- 276
- Part D claims, 2023
- 66%
- 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.
Caroline McFadden, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
276 49th percentile higher than 49% 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
✓
Board certification likely (heuristic, not verified)
Caroline McFadden, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 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 Caroline McFadden, M.D.?
Quality data not reportedPrimary specialty
Allergy Physician
Medicare Part D claims
276 63% vs specialty avg
Specialty distribution in Massachusetts
How Allergy 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 Allergy 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).
Caroline McFadden, M.D. appears in the CMS NPPES registry as a Allergy Physician provider holding M.D. credentials at 40 HOLLAND ST, Somerville, MA, 02144, with a listed phone of (617) 629-6250. NPI 1437362993 was issued on 05/08/2007.
Medicare Part D records for calendar year 2023 show 276 prescription claims written by this provider, covering 66 Medicare beneficiaries and totaling roughly $105K in drug spend, split 34% brand-name and 66% generic by claim count.
Allergy Physician is a narrow specialty nationwide, with 1,019 enrolled providers across 49 states and an average of 755 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 | 1437362993 |
|---|---|
| Specialty | Allergy Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 05/08/2007 |
Hospital and facility affiliations
Facilities where Caroline McFadden, M.D. 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.
Brigham And Womens Physicians Organization Inc
Boston, MA
Dana-Farber Cancer Institute, Inc.
Boston, MA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Caroline McFadden, M.D.. To verify Caroline McFadden, M.D.'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
Caroline McFadden, M.D. - brand share 34.0%
Allergy Physician average
34% brand-name claims vs 66% generic, on 276 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.
276
Total Claims
$105K
Total Drug Cost
66
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 401
- Total Day Supply
- 11,048
- Brand vs Generic
- 34% brand / 66% generic
- Brand Drug Cost
- $97K
- Generic Drug Cost
- $9K
Patient Demographics
- Average Patient Age
- 69.1 years
- Avg HCC Risk Score
- 1.14
- Gender Split
- 74% female / 26% male
- Age Distribution
- <65: 17, 65-74: 26, 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 Caroline McFadden, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Azelastine Hcl
Azelastine Hcl
46 claims
- Fluticasone Propio…
Fluticasone Propionate
45 claims
- Xolair
Xolair
26 claims
- Montelukast Sodium
Montelukast Sodium
25 claims
- Azelastine-Flutica… 17
Azelastine-Fluticasone
17 claims
- Flovent Hfa 16
Flovent Hfa
16 claims
- Hydroxyzine Hcl 15
Hydroxyzine Hcl
15 claims
- Epinephrine 13
Epinephrine
13 claims
| Drug | Claims |
|---|---|
| Azelastine Hcl | 46 |
| Fluticasone Propionate | 45 |
| Xolair Omalizumab | 26 |
| Montelukast Sodium | 25 |
| Azelastine-Fluticasone Azelastine/Fluticasone | 17 |
| Flovent Hfa Fluticasone Propionate | 16 |
| Hydroxyzine Hcl | 15 |
| Epinephrine | 13 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 12 |
| Advair Hfa Fluticasone Propion/Salmeterol | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Allergy Physician Overview
How Caroline McFadden, M.D. fits within the Allergy Physician landscape nationally.
1,019
Allergy Physician Providers in US
49
States with Allergy Physician
755
Avg Claims per Provider
Caroline McFadden, M.D.'s 276 claims are below the specialty average of 755.
Nearby Allergy Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as McFadden.
Dr. Donald Accetta
M.D., M.P.H
Taunton, MA
Dr. Priyal Amin
DO
Westford, MA
Dr. Theresia Bajusz
MD
Brookline, MA
Dr. Diana Balekian
MD MPH
Salem, MA
Dr. Wilfred Beaucher
MD
Chelmsford, MA
Compare Allergy 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 Massachusetts medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Allergy 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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Frequently Asked Questions
What is Caroline McFadden, M.D.'s specialty? ▼
Caroline McFadden, M.D. specializes in Allergy Physician and practices in Somerville, Massachusetts. Credentials: M.D..
How much does Caroline McFadden, M.D. prescribe under Medicare Part D? ▼
In 2023, Caroline McFadden, M.D. wrote 276 Medicare Part D claims totaling $105K in drug costs for 66 beneficiaries.
Where is Caroline McFadden, M.D. located? ▼
Caroline McFadden, M.D. is located at 40 HOLLAND ST, Somerville, MA, 02144. Phone: (617) 629-6250.
What is Caroline McFadden, M.D.'s NPI number? ▼
Caroline McFadden, M.D.'s National Provider Identifier (NPI) is 1437362993, issued on 05/08/2007.
Does Caroline McFadden, M.D. prescribe more brand-name or generic drugs? ▼
Caroline McFadden, M.D.'s prescribing is 34% brand-name and 66% generic drugs by claim count, with $97K in brand drug costs.
How many Allergy Physician providers are there in the US? ▼
There are 1,019 Allergy Physician providers across 49 states in the US. The average Allergy Physician provider writes 755 Medicare Part D claims per year.
What drugs does Caroline McFadden, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Caroline McFadden, M.D.'s most frequently prescribed drugs include Azelastine Hcl, Fluticasone Propionate, Xolair. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Caroline McFadden, M.D. accept Medicare? ▼
Caroline McFadden, M.D. appears in CMS Medicare data with 276 Part D claims and 66 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Caroline McFadden, M.D.'s credentials? ▼
Caroline McFadden, M.D.'s NPI is 1437362993 with credentials M.D.. 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.