Quick answers
- Does Wilhelm K. Martezian accept Medicare assignment?
- Yes. Medicare's clinician data says Wilhelm K. Martezian 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 Wilhelm K. Martezian see?
- In 2024, CMS data shows 235 Original Medicare patients and 1,743 services for Wilhelm K. Martezian. This counts Original Medicare only and measures volume, not quality.
- What is Wilhelm K. Martezian's NPI number?
- 1891905477. 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 Wilhelm K. Martezian, 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 | 235 |
|---|---|
| Services billed to Medicare | 1,743 |
| Different services or procedures | 10 |
| Participating Medicare provider | Yes |
| Average age of these patients | 85 |
Most frequent services
- Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes (99350)1,483 services
- Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes (99349)137 services
- Residence visit for new patient with high level of medical decision making, per day, if using time, at least 75 minutes (99345)98 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%
- Alzheimer's disease or dementia63%
- Arthritis58%
- Anxiety56%
- Depression54%
Hospitals where Wilhelm K. Martezian works
Medicare's Facility Affiliation Data lists Wilhelm K. Martezian 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.
- Cleveland Clinic Martin North HospitalStuart, FL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 100044
Practice locations
Addresses where Wilhelm K. Martezian is enrolled with Medicare (CMS data updated October 2, 2026).
- 2100 10th AveVero Beach, FL 32960 (772) 365‑4539
- 4407 6th St SWVero Beach, FL 32968 (772) 907‑5935
- 514 SE Port St Lucie BlvdPort Saint Lucie, FL 34984 (772) 871‑5900
Group practices
Medicare enrollment lists Wilhelm K. Martezian as a member of these groups (CMS data updated October 2, 2026).
- Legacy Healthcare Services Inc3,223 clinicians in the group
- Conviva Medical Center Management, LLC512 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Vero Beach
Clinicians with the same Medicare primary specialty in Vero Beach, FL — not a recommendation.
Other clinicians in Legacy Healthcare Services Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1891905477 |
| 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