Quick answers
- Does Niki Y. Constantinou accept Medicare assignment?
- Yes. Medicare's clinician data says Niki Y. Constantinou 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 Niki Y. Constantinou see?
- In 2024, CMS data shows 1,368 Original Medicare patients and 2,784 services for Niki Y. Constantinou. This counts Original Medicare only and measures volume, not quality.
- What is Niki Y. Constantinou's NPI number?
- 1174712194. 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 Niki Y. Constantinou, 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 | 1,368 |
|---|---|
| Services billed to Medicare | 2,784 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Screening 3d breast mammography (77063)1,187 services
- Screening mammography (77067)1,187 services
- Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066) (G0279)118 services
- Diagnostic mammography of 1 breast (77065)81 services
- Limited ultrasound scan of 1 breast (76642)69 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 cholesterol75%
- High blood pressure64%
- Arthritis46%
- Anxiety24%
- Osteoporosis24%
- Diabetes20%
Hospitals where Niki Y. Constantinou works
Medicare's Facility Affiliation Data lists Niki Y. Constantinou 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.
- Lake HealthConcord, OH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 360098
- UH Cleveland Medical CenterCleveland, OH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 360137
- UH St John Medical CenterWestlake, OH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 360123
- University Hospitals - Elyria Medical CenterElyria, OH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 360145
- University Hospitals Conneaut Medical CenterConneaut, OH · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 361308
Practice locations
Addresses where Niki Y. Constantinou is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 10; the Medicare profile lists all.
- 11100 Euclid AveCleveland, OH 44106
- 13207 Ravenna RdChardon, OH 44024 (440) 285‑6000
- 158 W Main RdConneaut, OH 44030 (440) 593‑1131
- 29000 Ctr Ridge RdWestlake, OH 44145 (440) 250‑8660
- 32800 Lorain RdNorth Ridgeville, OH 44039 (440) 406‑5550
Group practices
Medicare enrollment lists Niki Y. Constantinou as a member of this group (CMS data updated October 2, 2026).
- University Hospitals Medical Group Inc2,294 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Cleveland
Clinicians with the same Medicare primary specialty in Cleveland, OH — not a recommendation.
Other clinicians in University Hospitals Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2007 (19 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1174712194 |
| 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