Quick answers
- Does Stephen J. Keiran Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Stephen J. Keiran Jr. 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 Stephen J. Keiran Jr. see?
- In 2024, CMS data shows 749 Original Medicare patients and 2,802 services for Stephen J. Keiran Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Stephen J. Keiran Jr.'s NPI number?
- 1548264369. 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 Stephen J. Keiran Jr., 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 | 749 |
|---|---|
| Services billed to Medicare | 2,802 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)538 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)441 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)437 services
- Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)404 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)243 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%
- Chronic kidney disease75%
- Diabetes54%
- Arthritis52%
- Ischemic heart disease49%
Hospitals where Stephen J. Keiran Jr. works
Medicare's Facility Affiliation Data lists Stephen J. Keiran Jr. 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.
- Baptist Health HardinElizabethtown, KY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 180012
- Baptist Health LouisvilleLouisville, KY · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 180130
- Norton Hospitals, IncLouisville, KY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 180088
- UOFL HEALTH - JEWISH HOSPITAL and Mary & Elizabeth HospitalLouisville, KY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 180040
Practice locations
Addresses where Stephen J. Keiran Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 1263 Hospital Dr NWCorydon, IN 47112 (812) 738‑4251
- 2355 Poplar Level Rd, Suite 200Louisville, KY 40217 (502) 587‑9660
- 6400 Dutchmans Pkwy, Suite 250Louisville, KY 40205 (502) 587‑9660
Group practices
Medicare enrollment lists Stephen J. Keiran Jr. as a member of this group (CMS data updated October 2, 2026).
- Nephrology Associates of Kentuckiana PSC40 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Corydon
Clinicians with the same Medicare primary specialty in Corydon, IN — not a recommendation.
Other clinicians in Nephrology Associates of Kentuckiana PSC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Louisville School Of Medicine |
| Graduation year | 2000 (26 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548264369 |
| 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