Margaret Ann Vallen Mashikian, M.D.
Allergy Physician · South Weymouth, MA
Margaret Ann Vallen Mashikian, M.D. is an allergy physician with a practice address in South Weymouth, Massachusetts, and NPI 1881751394, issued on Jan 3, 2007. Check the license (Massachusetts 075928, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Margaret Ann Vallen Mashikian
- Credential
- M.D.
- Primary taxonomy
- Allergy Physician 207KA0200X
- License number
- 075928 MA
Self-reported in NPPES; status is on the state search - Practice location
- 851 Main St, South Weymouth, MA 02190
- Phone
- (781) 331-1060
- Enumerated
- Jan 3, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 3160432 MA
- Medicare enrollment
- Enrolled (PECOS I20050809000631); may accept Medicare assignment
- Medical or professional school
- Drexel University College Of Medicine, 1986
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest allergy physician records → All 37 in Massachusetts → Look up another NPI →
Also registered at 851 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Iraj Aghdasi, M.D.Internal Medicine Physician1154405934
- Paul Blachman, MDNeurology Physician1669462578
- Martin Broff, M.D.Allergy & Immunology Physician1043208192
- Emma Burnick, PA-CPhysician Assistant1760251961
- Donna Chapman, ACNPNurse Practitioner1063711414
- Rajinder Chawla, M.D.Nephrology Physician1407896939
Verify Margaret Ann Vallen Mashikian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 075928Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% more Medicare Part D claims than the average allergy physician in 2024
1,373 Medicare Part D claims for 222 beneficiaries, against an average of 750 among the 645 providers of this specialty who prescribed in Part D. Brand-name drugs were 47% of claims.
Most prescribed
- Montelukast Sodium146 claims
- Fluticasone Propionate103 claims
- Breo Ellipta93 claims
- Azelastine Hcl91 claims
- Albuterol Sulfate Hfa86 claims
- Breztri Aerosphere51 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $2,671.82
114 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 502 providers of this specialty with any payment received $9,080.33 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Margaret Ann Vallen Mashikian among 37 allergy physician records in Massachusetts
Margaret Ann Vallen Mashikian, M.D. is one of 37 allergy physician records with a practice address in Massachusetts. 46% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 81% of them.
- NPI issued2007 · 81% of these records are older, 11% newer
- In a Medicare fileYes · 46% of these records are
- In the CMS Doctors and Clinicians fileYes · 35% of these records are
- Graduated1986 · median 1986 among the 13 with a school on file
- Record last updated2007 · 89% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207KA0200X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy Physician providers in Massachusetts
There are 37 allergy physician records in Massachusetts.
All 37 in Massachusetts → Every provider in South Weymouth → Allergy Physician nationwide →
The 8 allergy physician records with the nearest ZIP codes
- Zuhayr Hemady, M.D.Quincy, MA 021691275591257
- Joel Bleier, MDMedford, MA 021551912904624
- Caroline McFadden, M.D.Somerville, MA 021441437362993
- Sachin Baxi, M.D.Boston, MA 021151053375626
- Rodrigo Hoyos, M.D.Boston, MA 021151609228345
- Douglas McDonald, MD, PHDBoston, MA 021151558447482
- Alexandria Hairston, MDBoston, MA 021141114503174
- Mark Claus, M.D.Brockton, MA 023011518910686
Common questions
What is Margaret Ann Vallen Mashikian, M.D.'s NPI number?
Margaret Ann Vallen Mashikian, M.D.'s National Provider Identifier (NPI) is 1881751394, issued on Jan 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Ann Vallen Mashikian, M.D. located?
The NPPES record lists a practice address at 851 Main St, South Weymouth, MA, 02190. Phone: (781) 331-1060. Providers update this record themselves, so call before visiting.
How can I verify Margaret Ann Vallen Mashikian, M.D.'s license?
NPPES lists Massachusetts license number 075928, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Margaret Ann Vallen Mashikian, M.D. prescribe under Medicare Part D?
In 2024, Margaret Ann Vallen Mashikian, M.D. had 1,373 Medicare Part D claims for 222 beneficiaries; the average among allergy physician prescribers was 750. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.