Quick answers
- Does Thomas J. Merkle accept Medicare assignment?
- Yes. Medicare's clinician data says Thomas J. Merkle 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 Thomas J. Merkle see?
- In 2024, CMS data shows 195 Original Medicare patients and 665 services for Thomas J. Merkle. This counts Original Medicare only and measures volume, not quality.
- What is Thomas J. Merkle's NPI number?
- 1770786394. 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 Thomas J. Merkle, 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 | 195 |
|---|---|
| Services billed to Medicare | 665 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)248 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)165 services
- Hospital discharge day management, more than 30 minutes (99239)66 services
- Prolonged hospital inpatient or observation care evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service); each additional 15 minutes by th (G0316)56 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)33 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%
- Arthritis72%
- Diabetes46%
- Ischemic heart disease45%
- Chronic kidney disease43%
Hospitals where Thomas J. Merkle works
Medicare's Facility Affiliation Data lists Thomas J. Merkle 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.
- Umd Rehabilitation & Orthopaedic InstituteBaltimore, MD · Acute Care Hospital · Emergency services: not listed by Medicare · CCN 210058
- Umd Upper Chesapeake Medical CenterBel Air, MD · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 210049
- University of Maryland Medical CenterBaltimore, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210002
- University of MD St Joseph Medical CenterTowson, MD · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 210063
Practice locations
Addresses where Thomas J. Merkle is enrolled with Medicare (CMS data updated October 2, 2026).
- 2200 Kernan DrGwynn Oak, MD 21207 (410) 448‑2500
Group practices
Medicare enrollment lists Thomas J. Merkle as a member of these groups (CMS data updated October 2, 2026).
- University of Maryland Community Medical Group Inc477 clinicians in the group
- Mdics at Umroi, LLC22 clinicians in the group
Specialties
- Internal Medicineprimary
- Hospitalistalso
Other internal medicine doctors in Maryland
Clinicians with the same Medicare primary specialty in Maryland — not a recommendation.
Other clinicians in University of Maryland Community Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Maryland School Of Medicine |
| Graduation year | 2007 (19 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770786394 |
| 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