Marie Castillo-Alcasid, M.D.
NPI 1124135025 · Internal Medicine Physician · Fulton, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marie Castillo-Alcasid, M.D. is a Internal Medicine Physician provider in Fulton, NY (NPI 1124135025).
Provider details
- NPI number
- 1124135025
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 237698 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
555 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 297 | $45 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 83 | $76 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 74 | $74 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 71 | $122 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 30 | $108 |
Typical Medicare-allowed amounts for these services range $45–$122 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 28 | 26 |
| Famotidine | 24 | 24 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 24 | 21 |
| Doxycycline Hyclate | 22 | 22 |
| Cefuroxime Axetilbrand: Cefuroxime | 19 | 19 |
| Cefdinir | 18 | 18 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 15 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-24
- Last updated
- 2007-07-08
Frequently asked questions
- What is Marie Castillo-Alcasid's NPI number?
- Marie Castillo-Alcasid's National Provider Identifier (NPI) is 1124135025, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marie Castillo-Alcasid's specialty?
- Marie Castillo-Alcasid is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marie Castillo-Alcasid located?
- Marie Castillo-Alcasid's practice location on file with NPPES is 522 S 4th St, Fulton, NY 13069-2946.
- What is Marie Castillo-Alcasid's phone number?
- The practice phone number listed in the NPPES registry for Marie Castillo-Alcasid is (315) 598-4740.
- Does Marie Castillo-Alcasid accept Medicare?
- Marie Castillo-Alcasid is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marie Castillo-Alcasid's NPI active?
- Yes — Marie Castillo-Alcasid's NPI (1124135025) 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.