Quick answers
- Does Kiyoe W. Sullivan accept Medicare assignment?
- Yes. Medicare's clinician data says Kiyoe W. Sullivan 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 Kiyoe W. Sullivan see?
- In 2024, CMS data shows 577 Original Medicare patients and 1,978 services for Kiyoe W. Sullivan. This counts Original Medicare only and measures volume, not quality.
- What is Kiyoe W. Sullivan's NPI number?
- 1720022171. 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 Kiyoe W. Sullivan, 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 | 577 |
|---|---|
| Services billed to Medicare | 1,978 |
| Different services or procedures | 30 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)833 services
- Special stained specimen slides to examine tissue, each additional procedure (88341)337 services
- Protein measurement, serum (84165)149 services
- Pathology examination of tissue using a microscope, moderately high complexity (88307)127 services
- Special stained specimen slides to examine tissue, initial procedure (88342)95 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 pressure74%
- Arthritis48%
- Ischemic heart disease32%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)31%
- Anxiety26%
Hospitals where Kiyoe W. Sullivan works
Medicare's Facility Affiliation Data lists Kiyoe W. Sullivan 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.
- Danbury HospitalDanbury, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070033
- Norwalk HospitalNorwalk, CT · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 070034
- St Vincent's Medical CenterBridgeport, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070028
- Stamford HospitalStamford, CT · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 070006
Practice locations
Addresses where Kiyoe W. Sullivan is enrolled with Medicare (CMS data updated October 2, 2026).
- 24 Hospital AveDanbury, CT 06810 (203) 739‑7118
- 24 Stevens StNorwalk, CT 06850 (203) 852‑2000
Group practices
Medicare enrollment lists Kiyoe W. Sullivan as a member of this group (CMS data updated October 2, 2026).
- Nuvance Health Medical Practice Ct Inc747 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Danbury
Clinicians with the same Medicare primary specialty in Danbury, CT — not a recommendation.
Other clinicians in Nuvance Health Medical Practice Ct Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 (35 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720022171 |
| 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