Maria Castells, MD
NPI 1427039478 · Allergy & Immunology Physician · Gardner, MA
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Castells, MD is a Allergy & Immunology Physician provider in Gardner, MA (NPI 1427039478).
Provider details
- NPI number
- 1427039478
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 73716 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
121 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 44 | $146 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 40 | $152 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 37 | $110 |
Typical Medicare-allowed amounts for these services range $110–$152 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omalizumabbrand: Xolair | 41 | — |
| Diphenhydramine Hcl | 27 | — |
| Epinephrine | 26 | 20 |
| Cromolyn Sodium | 24 | — |
| Hydroxyzine Hcl | 20 | — |
| Montelukast Sodium | 20 | — |
| Dupilumabbrand: Dupixent Syringe | 19 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$13,560 across 10 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
- 2005-11-08
- Last updated
- 2019-12-09
- Certified
- 2019-12-09
Frequently asked questions
- What is Maria Castells's NPI number?
- Maria Castells's National Provider Identifier (NPI) is 1427039478, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Castells's specialty?
- Maria Castells is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Maria Castells located?
- Maria Castells's practice location on file with NPPES is 358 Elm St, Gardner, MA 01440-3926.
- What is Maria Castells's phone number?
- The practice phone number listed in the NPPES registry for Maria Castells is (603) 432-9513.
- Does Maria Castells accept Medicare?
- Maria Castells is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Castells's NPI active?
- Yes — Maria Castells's NPI (1427039478) is active in the NPPES registry as of the last update on 2019-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.