Quick answers
- Does Diego S. Illanes accept Medicare assignment?
- Yes. Medicare's clinician data says Diego S. Illanes 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 Diego S. Illanes see?
- In 2024, CMS data shows 284 Original Medicare patients and 3,209 services for Diego S. Illanes. This counts Original Medicare only and measures volume, not quality.
- What is Diego S. Illanes's NPI number?
- 1568529121. 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 Diego S. Illanes, 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 | 284 |
|---|---|
| Services billed to Medicare | 3,209 |
| Different services or procedures | 53 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Injection, onabotulinumtoxina, 1 unit (J0585)2,205 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)155 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)106 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)102 services
- Electronic assessment of bladder emptying (51741)49 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 cholesterol71%
- High blood pressure69%
- Arthritis58%
- Anxiety29%
- Depression27%
- Osteoporosis24%
Hospitals where Diego S. Illanes works
Medicare's Facility Affiliation Data lists Diego S. Illanes 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.
- Emerson Hospital -W Concord, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220084
- John T Mather Memorial Hospital of Port JeffersonPort Jefferson, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330185
- Milford Regional Medical CenterMilford, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220090
- Peconic Bay Medical CenterRiverhead, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330107
Practice locations
Addresses where Diego S. Illanes is enrolled with Medicare (CMS data updated October 2, 2026).
- 101 Saint Andrews LnGlen Cove, NY 11542 (516) 674‑7591
- 131 Old Rd To 9 Acre CorConcord, MA 01742 (978) 287‑3835
- 1601 S Main StFall River, MA 02724 (508) 678‑0004
- 200 Mill Rd, Suite 190Fairhaven, MA 02719 (508) 973‑0857
Group practices
Medicare enrollment lists Diego S. Illanes as a member of these groups (CMS data updated October 2, 2026).
- North Shore-Lij Medical PC6,440 clinicians in the group
- Southcoast Physicians Group Inc881 clinicians in the group
- Emerson Practice Associates, Inc240 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Glen Cove
Clinicians with the same Medicare primary specialty in Glen Cove, 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 |
|---|---|
| Graduation year | 1999 (27 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1568529121 |
| 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