Quick answers
- Does Cynthia M. Ronan accept Medicare assignment?
- Yes. Medicare's clinician data says Cynthia M. Ronan 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 Cynthia M. Ronan see?
- In 2024, CMS data shows 56 Original Medicare patients and 150 services for Cynthia M. Ronan. This counts Original Medicare only and measures volume, not quality.
- What is Cynthia M. Ronan's NPI number?
- 1346251659. 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 Cynthia M. Ronan, 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 | 56 |
|---|---|
| Services billed to Medicare | 150 |
| Different services or procedures | 17 |
| Participating Medicare provider | Yes |
| Average age of these patients | 66 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)29 services
- Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)29 services
- Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory (Q0091)22 services
- Complete ultrasound scan of pelvis (76856)18 services
- Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina (76830)15 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 pressure59%
- Arthritis38%
- Anxiety36%
- Depression30%
- Diabetes23%
Hospitals where Cynthia M. Ronan works
Medicare's Facility Affiliation Data lists Cynthia M. Ronan 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.
- Griffin HospitalDerby, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070031
Practice locations
Addresses where Cynthia M. Ronan is enrolled with Medicare (CMS data updated October 2, 2026).
- 300 Seymour Ave, Suite 102Derby, CT 06418 (203) 516‑5303
Group practices
Medicare enrollment lists Cynthia M. Ronan as a member of this group (CMS data updated October 2, 2026).
- Griffin Faculty Physicians Inc134 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Derby
Clinicians with the same Medicare primary specialty in Derby, CT — not a recommendation.
Other clinicians in Griffin Faculty Physicians Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346251659 |
| 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