Quick answers
- Does John T. Merrill Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says John T. Merrill 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 John T. Merrill Jr. see?
- In 2024, CMS data shows 17 Original Medicare patients and 55 services for John T. Merrill Jr.. This counts Original Medicare only and measures volume, not quality.
- What is John T. Merrill Jr.'s NPI number?
- 1679390611. 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 John T. Merrill 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 | 17 |
|---|---|
| Services billed to Medicare | 55 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
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 cholesterol75%
- High blood pressure71%
Practice locations
Addresses where John T. Merrill Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 1160 Dublin Rd, Suite 400Columbus, OH 43215 (847) 386‑7744
- 433 Obetz RdColumbus, OH 43207 (847) 386‑7744
- 4900 Delhi RdCincinnati, OH 45238 (513) 847‑6778
Group practices
Medicare enrollment lists John T. Merrill Jr. as a member of these groups (CMS data updated October 2, 2026).
- CG Medical Associates Inc173 clinicians in the group
- Telemedico Physicians Cardiology Ohio Inc6 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Columbus
Clinicians with the same Medicare primary specialty in Columbus, OH — not a recommendation.
Other clinicians in CG Medical Associates Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2021 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1679390611 |
| 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