Quick answers
- Does Maurice D. Castillo accept Medicare assignment?
- Yes. Medicare's clinician data says Maurice D. Castillo accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Maurice D. Castillo see?
- In 2024, CMS data shows 140 Original Medicare patients and 436 services for Maurice D. Castillo. This counts Original Medicare only and measures volume, not quality.
- What is Maurice D. Castillo's NPI number?
- 1912993643. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Maurice D. Castillo, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 140 |
|---|---|
| Services billed to Medicare | 436 |
| Different services or procedures | 66 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)58 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)56 services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)36 services
- Aspiration and/or injection of fluid from large joint (20610)25 services
- X-ray of knee, 3 views (73562)22 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis71%
- Diabetes34%
- Ischemic heart disease33%
- Anxiety26%
Practice locations
Addresses where Maurice D. Castillo is enrolled with Medicare (CMS data updated October 2, 2026).
- 1728 Sunrise HwyMerrick, NY 11566 (516) 992‑4700
- 36 Lincoln AveRockville Centre, NY 11570 (516) 536‑2800
- 444 Merrick RdLynbrook, NY 11563
- 660 BroadwayMassapequa, NY 11758 (516) 536‑2800
Group practices
Medicare enrollment lists Maurice D. Castillo as a member of this group (CMS data updated October 2, 2026).
- True North Medical Group PC188 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Merrick
Clinicians with the same Medicare primary specialty in Merrick, NY — not a recommendation.
Other clinicians in True North Medical Group PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 1998 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1912993643 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians