Quick answers
- Does Kathryn J. Drennan accept Medicare assignment?
- Yes. Medicare's clinician data says Kathryn J. Drennan 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 Kathryn J. Drennan see?
- In 2024, CMS data shows 38 Original Medicare patients and 70 services for Kathryn J. Drennan. This counts Original Medicare only and measures volume, not quality.
- What is Kathryn J. Drennan's NPI number?
- 1770792251. 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 Kathryn J. Drennan, 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 | 38 |
|---|---|
| Services billed to Medicare | 70 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 49 |
Most frequent services
- Complete ultrasound scan of pelvis (76856)16 services
- Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina (76830)14 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).
- Anxiety53%
- High blood pressure47%
- Depression42%
- High cholesterol39%
- Asthma32%
- Arthritis29%
Hospitals where Kathryn J. Drennan works
Medicare's Facility Affiliation Data lists Kathryn J. Drennan 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.
- Highland HospitalRochester, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330164
- Strong Memorial HospitalRochester, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330285
Practice locations
Addresses where Kathryn J. Drennan is enrolled with Medicare (CMS data updated October 2, 2026).
- 601 Elmwood AveRochester, NY 14642 (585) 487‑3400
Group practices
Medicare enrollment lists Kathryn J. Drennan as a member of this group (CMS data updated October 2, 2026).
- Strong Obstetrics-Gynecology Group80 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Rochester
Clinicians with the same Medicare primary specialty in Rochester, NY — not a recommendation.
Other clinicians in Strong Obstetrics-Gynecology Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Washington School Of Medicine |
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770792251 |
| 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