Margaret Vallen Mashikian, M.D.
NPI 1881751394 · Allergy Physician · South Weymouth, MA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Vallen Mashikian, M.D. is a Allergy Physician provider in South Weymouth, MA (NPI 1881751394).
Provider details
- NPI number
- 1881751394
- Entity type
- Individual
- Primary specialty
- Allergy PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 075928 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
3,682 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Test for Allergy Using Allergenic Extract95004 | 1,817 | $4 |
| Professional Service for Preparation and Provision of 1 Or More Antigens95165 | 699 | $16 |
| Test for Allergy Using Allergenic Extract Injected Into Skin95024 | 400 | $9 |
| Professional Service for Multiple Injections of Allergen95117 | 387 | $14 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 192 | $94 |
| Test to Measure Expiratory Airflow and Volume94010 | 73 | $29 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Montelukast Sodium | 146 | 37 |
| Fluticasone Propionate | 103 | 51 |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 93 | 24 |
| Azelastine Hcl | 91 | 51 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 86 | 53 |
| Budesonide/Glycopyr/Formoterolbrand: Breztri Aerosphere | 51 | 13 |
| Fluticasone Propion/Salmeterol |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,672 across 114 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-03
- Last updated
- 2007-07-08
Frequently asked questions
- What is Margaret Vallen Mashikian's NPI number?
- Margaret Vallen Mashikian's National Provider Identifier (NPI) is 1881751394, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Vallen Mashikian's specialty?
- Margaret Vallen Mashikian is listed in the NPPES registry with a primary specialty of Allergy Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Vallen Mashikian located?
- Margaret Vallen Mashikian's practice location on file with NPPES is 851 Main St, South Weymouth, MA 02190-1612.
- What is Margaret Vallen Mashikian's phone number?
- The practice phone number listed in the NPPES registry for Margaret Vallen Mashikian is (781) 331-1060.
- Does Margaret Vallen Mashikian accept Medicare?
- Margaret Vallen Mashikian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Vallen Mashikian's NPI active?
- Yes — Margaret Vallen Mashikian's NPI (1881751394) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.