NPI registry status
Active
2026 NPPES data Allergy Physician NPI 1881751394 M.D.
Verify on CMS → Margaret Vallen Mashikian, M.D.
Allergy Physician in South Weymouth, 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
913
Medicare Part D claims · 196 beneficiaries · Allergy Physician avg: 755
Generic prescribing
55%
generic claims · 45% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$2.7K
114 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
Margaret Vallen Mashikian, M.D. filed 913 Medicare Part D claims in 2023 as a Allergy Physician in South Weymouth, Massachusetts, prescribing 55% generic.
- 913
- Part D claims, 2023
- 55%
- generic prescribing
- $2.7K
- 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.
Margaret Vallen Mashikian, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
913 Top 25% higher than 75% 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-eligible specialty (heuristic, not verified)
Margaret Vallen Mashikian, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Margaret Vallen Mashikian, M.D.?
Quality data not reportedPrimary specialty
Allergy Physician
Medicare Part D claims
913 21% 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).
Margaret Vallen Mashikian, M.D. appears in the CMS NPPES registry as a Allergy Physician provider holding M.D. credentials at 851 MAIN ST, South Weymouth, MA, 02190, with a listed phone of (781) 331-1060. NPI 1881751394 was issued on 01/03/2007.
Medicare Part D records for calendar year 2023 show 913 prescription claims written by this provider, covering 196 Medicare beneficiaries and totaling roughly $372K in drug spend, split 45% brand-name and 55% 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 | 1881751394 |
|---|---|
| Specialty | Allergy Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 01/03/2007 |
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 Margaret Vallen Mashikian, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$2.7K
Largest payer
AstraZeneca Pharmaceuticals LP
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 Margaret Vallen Mashikian, M.D.. To verify Margaret Vallen Mashikian, 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
Margaret Vallen Mashikian, M.D. - brand share 45.0%
Allergy Physician average
45% brand-name claims vs 55% generic, on 913 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.
913
Total Claims
$372K
Total Drug Cost
196
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,692
- Total Day Supply
- 48,677
- Brand vs Generic
- 45% brand / 55% generic
- Brand Drug Cost
- $349K
- Generic Drug Cost
- $22K
- Antibiotic Claims
- 32
Patient Demographics
- Average Patient Age
- 70.8 years
- Avg HCC Risk Score
- 1.24
- Gender Split
- 68% female / 32% male
- Age Distribution
- <65: 32, 65-74: 83, 75-84: 67, 85+: 14
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Margaret Vallen Mashikian, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Azelastine Hcl
Azelastine Hcl
93 claims
- Montelukast Sodium
Montelukast Sodium
92 claims
- Fluticasone Propio…
Fluticasone Propionate
82 claims
- Breo Ellipta
Breo Ellipta
65 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
53 claims
- Olopatadine Hcl
Olopatadine Hcl
43 claims
- Advair Diskus
Advair Diskus
40 claims
- Breztri Aerosphere 35
Breztri Aerosphere
35 claims
| Drug | Claims |
|---|---|
| Azelastine Hcl | 93 |
| Montelukast Sodium | 92 |
| Fluticasone Propionate | 82 |
| Breo Ellipta Fluticasone/Vilanterol | 65 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 53 |
| Olopatadine Hcl | 43 |
| Advair Diskus Fluticasone Propion/Salmeterol | 40 |
| Breztri Aerosphere Budesonide/Glycopyr/Formoterol | 35 |
| Prednisone | 32 |
| Ipratropium Bromide | 24 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Allergy Physician Overview
How Margaret Vallen Mashikian, 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
Margaret Vallen Mashikian, M.D.'s 913 claims are above 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 Vallen Mashikian.
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.
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 Massachusetts
Frequently Asked Questions
What is Margaret Vallen Mashikian, M.D.'s specialty? ▼
Margaret Vallen Mashikian, M.D. specializes in Allergy Physician and practices in South Weymouth, Massachusetts. Credentials: M.D..
How much does Margaret Vallen Mashikian, M.D. prescribe under Medicare Part D? ▼
In 2023, Margaret Vallen Mashikian, M.D. wrote 913 Medicare Part D claims totaling $372K in drug costs for 196 beneficiaries.
Where is Margaret Vallen Mashikian, M.D. located? ▼
Margaret Vallen Mashikian, M.D. is located at 851 MAIN ST, South Weymouth, MA, 02190. Phone: (781) 331-1060.
What is Margaret Vallen Mashikian, M.D.'s NPI number? ▼
Margaret Vallen Mashikian, M.D.'s National Provider Identifier (NPI) is 1881751394, issued on 01/03/2007.
Does Margaret Vallen Mashikian, M.D. prescribe more brand-name or generic drugs? ▼
Margaret Vallen Mashikian, M.D.'s prescribing is 45% brand-name and 55% generic drugs by claim count, with $349K 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 Margaret Vallen Mashikian, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Margaret Vallen Mashikian, M.D.'s most frequently prescribed drugs include Azelastine Hcl, Montelukast Sodium, Fluticasone Propionate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Margaret Vallen Mashikian, M.D. accept Medicare? ▼
Margaret Vallen Mashikian, M.D. appears in CMS Medicare data with 913 Part D claims and 196 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Margaret Vallen Mashikian, M.D.'s credentials? ▼
Margaret Vallen Mashikian, M.D.'s NPI is 1881751394 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.