Quick answers
- Does Joseph P. Kiernan accept Medicare assignment?
- Yes. Medicare's clinician data says Joseph P. Kiernan 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 Joseph P. Kiernan see?
- In 2024, CMS data shows 1,540 Original Medicare patients and 7,596 services for Joseph P. Kiernan. This counts Original Medicare only and measures volume, not quality.
- What is Joseph P. Kiernan's NPI number?
- 1669429973. 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 Joseph P. Kiernan, 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 | 1,540 |
|---|---|
| Services billed to Medicare | 7,596 |
| Different services or procedures | 46 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Photography of content of eyes (92285)1,688 services
- Photography of the retina (92250)1,093 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,029 services
- Exam of visual field with extended testing (92083)517 services
- Imaging of retina (92134)484 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%
- Arthritis50%
- Diabetes34%
- Ischemic heart disease28%
- Chronic kidney disease23%
Hospitals where Joseph P. Kiernan works
Medicare's Facility Affiliation Data lists Joseph P. Kiernan 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.
- Advocate Good Shepherd HospitalBarrington, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140291
- Northshore University Healthsystem - Evanston HospitalEvanston, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140010
Practice locations
Addresses where Joseph P. Kiernan is enrolled with Medicare (CMS data updated October 2, 2026).
- 1120 W Lake Cook Rd, Suite CBuffalo Grove, IL 60089 (847) 459‑6060
- 27750 W Hwy 22, Suite 200Barrington, IL 60010 (847) 382‑4116
Group practices
Medicare enrollment lists Joseph P. Kiernan as a member of this group (CMS data updated October 2, 2026).
- Premier Eye Care and Surgery Ltd7 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Buffalo Grove
Clinicians with the same Medicare primary specialty in Buffalo Grove, IL — not a recommendation.
Other clinicians in Premier Eye Care and Surgery Ltd
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Chicago, Pritzker School Of Medicine |
| Graduation year | 1979 (47 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1669429973 |
| 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