Quick answers
- Does Diana C. Martins- Welch accept Medicare assignment?
- Yes. Medicare's clinician data says Diana C. Martins- Welch 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 Diana C. Martins- Welch see?
- In 2024, CMS data shows 170 Original Medicare patients and 481 services for Diana C. Martins- Welch. This counts Original Medicare only and measures volume, not quality.
- What is Diana C. Martins- Welch's NPI number?
- 1275832446. 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 Diana C. Martins- Welch, 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 | 170 |
|---|---|
| Services billed to Medicare | 481 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)158 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)133 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)67 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)59 services
- Advance care planning, first 30 minutes (99497)19 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 cholesterol72%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)58%
- Anxiety55%
- Arthritis54%
- Ischemic heart disease44%
Hospitals where Diana C. Martins- Welch works
Medicare's Facility Affiliation Data lists Diana C. Martins- Welch at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- North Shore University HospitalManhasset, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330106
Practice locations
Addresses where Diana C. Martins- Welch is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.
- 1111 Marcus AveNew Hyde Park, NY 11042
- 27005 75th AveNew Hyde Park, NY 11040
- 27005 76th Ave GfNew Hyde Park, NY 11040 (718) 470‑7501
- 300 Community DrManhasset, NY 11030
- 300 Community Dr LlManhasset, NY 11030 (516) 562‑2229
Group practices
Medicare enrollment lists Diana C. Martins- Welch as a member of this group (CMS data updated October 2, 2026).
- North Shore-Lij Medical PC6,440 clinicians in the group
Specialties
- Hospice/Palliative Careprimary
Other palliative care doctors in New Hyde Park
Clinicians with the same Medicare primary specialty in New Hyde Park, NY — not a recommendation.
Other clinicians in North Shore-Lij Medical PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York At Stony Brook, School Of Medicine |
| Graduation year | 2011 (15 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1275832446 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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