Maria Castells, MD
Allergy & Immunology Physician · Gardner, MA
Maria Castells, MD is an allergy & immunology physician with a practice address in Gardner, Massachusetts, and NPI 1427039478, issued on Nov 8, 2005. Check the license (Massachusetts 73716, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Maria Castells
- Credential
- MD
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- 73716 MA
Self-reported in NPPES; status is on the state search - Practice location
- 358 Elm St, Gardner, MA 01440
- Phone
- (603) 432-9513
- Enumerated
- Nov 8, 2005
- Record last updated
- Dec 9, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicaid ID
- 3124045 MA
- Medicare enrollment
- Enrolled (PECOS I20050520000579); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 121 in Massachusetts → Look up another NPI →
Verify Maria Castells in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 73716Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
349 Medicare Part D claims for 75 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 37% of claims.
Most prescribed
- Xolair41 claims
- Diphenhydramine Hcl27 claims
- Epinephrine26 claims
- Cromolyn Sodium24 claims
- Hydroxyzine Hcl20 claims
- Montelukast Sodium20 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: $13,560.48
10 payments; by number, the most common kind was food and beverage; the largest payer was Blueprint Medicines Corporation. The 2,496 providers of this specialty with any payment received $8,321.81 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.
Bills Medicare through one group practice
- Brigham And Womens Physicians Organization IncChestnut Hill, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Maria Castells among 121 allergy & immunology physician records in Massachusetts
Maria Castells, MD is one of 121 allergy & immunology physician records with a practice address in Massachusetts. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1979 · median 2003 among the 86 with a school on file
- Record last updated2019 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in Massachusetts
There are 121 allergy & immunology physician records in Massachusetts.
All 121 in Massachusetts → Every provider in Gardner → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Francisco Bonilla, M.D.Leominster, MA 014531245298215
- Tracy Kruzick, MDLeominster, MA 014531558424812
- David Riester, M.D.Leominster, MA 014531306843941
- Jordan Scott, M.D.Leominster, MA 014531275517245
- Margo Stevenson, D.O.Sturbridge, MA 015661053755611
- Michelle Conroy, M.D.Worcester, MA 016551922026343
- Whitney Dunlap, MDWorcester, MA 016551093932824
- Thomas Edwards, M.D.Pittsfield, MA 012011740215771
Common questions
What is Maria Castells, MD's NPI number?
Maria Castells, MD's National Provider Identifier (NPI) is 1427039478, issued on Nov 8, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Maria Castells, MD located?
The NPPES record lists a practice address at 358 Elm St, Gardner, MA, 01440. Phone: (603) 432-9513. Providers update this record themselves, so call before visiting.
How can I verify Maria Castells, MD's license?
NPPES lists Massachusetts license number 73716, 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 Maria Castells, MD prescribe under Medicare Part D?
In 2024, Maria Castells, MD had 349 Medicare Part D claims for 75 beneficiaries; the average among allergy & immunology physician prescribers was 741. 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.