Quick answers
- Does Karen M. Allison accept Medicare assignment?
- Yes. Medicare's clinician data says Karen M. Allison 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 Karen M. Allison see?
- In 2024, CMS data shows 336 Original Medicare patients and 1,434 services for Karen M. Allison. This counts Original Medicare only and measures volume, not quality.
- What is Karen M. Allison's NPI number?
- 1588687750. 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 Karen M. Allison, 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 | 336 |
|---|---|
| Services billed to Medicare | 1,434 |
| Different services or procedures | 32 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)408 services
- Exam of visual field with extended testing (92083)230 services
- Imaging of optic nerve (92133)211 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)189 services
- Exam of the internal drainage system of eye (92020)173 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 cholesterol72%
- Diabetes39%
- Arthritis39%
- Chronic kidney disease26%
- Ischemic heart disease21%
Hospitals where Karen M. Allison works
Medicare's Facility Affiliation Data lists Karen M. Allison 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.
- Strong Memorial HospitalRochester, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330285
Practice locations
Addresses where Karen M. Allison is enrolled with Medicare (CMS data updated October 2, 2026).
- 162 W 56th St, Suite 206New York, NY 10019 (212) 459‑0001
- 20516 Linden BlvdSaint Albans, NY 11412 (718) 525‑2200
- 24836 Jericho TpkeFloral Park, NY 11001 (718) 525‑2200
- 601 Elmwood AveRochester, NY 14642 (585) 273‑3937
Group practices
Medicare enrollment lists Karen M. Allison as a member of these groups (CMS data updated October 2, 2026).
- Karen Allison, M.D., P.C.2 clinicians in the group
- University of Rochester Glaucoma Services2 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rutgers R W Johnson Medical School (cam/new Bruns/pisc) |
| Graduation year | 1999 (27 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588687750 |
| 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