Quick answers
- Does Mary Lou K. McGregor accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Lou K. McGregor 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 Mary Lou K. McGregor see?
- In 2024, CMS data shows 74 Original Medicare patients and 196 services for Mary Lou K. McGregor. This counts Original Medicare only and measures volume, not quality.
- What is Mary Lou K. McGregor's NPI number?
- 1487654422. 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 Mary Lou K. McGregor, 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 | 74 |
|---|---|
| Services billed to Medicare | 196 |
| Different services or procedures | 13 |
| Participating Medicare provider | Yes |
| Average age of these patients | 65 |
Most frequent services
- Exam to measure eye deviation and range of motion (92060)78 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)55 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)22 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)13 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 cholesterol62%
- High blood pressure58%
- Arthritis39%
- Anxiety30%
- Ischemic heart disease20%
- Depression20%
Practice locations
Addresses where Mary Lou K. McGregor is enrolled with Medicare (CMS data updated October 2, 2026).
- 555 S 18th St, Suite 4cColumbus, OH 43205 (614) 224‑6222
- 700 Children'S DrColumbus, OH 43205 (614) 722‑2000
Group practices
Medicare enrollment lists Mary Lou K. McGregor as a member of these groups (CMS data updated October 2, 2026).
- Nationwide Children's Hospital142 clinicians in the group
- Pediatric Ophthalmology Associates Inc10 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Columbus
Clinicians with the same Medicare primary specialty in Columbus, OH — not a recommendation.
Other clinicians in Nationwide Children's Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northeastern Ohio University College Of Medicine |
| Graduation year | 1985 (41 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487654422 |
| 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
- 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