Quick answers
- Does Timothy J. Greenan accept Medicare assignment?
- Yes. Medicare's clinician data says Timothy J. Greenan 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 Timothy J. Greenan see?
- In 2024, CMS data shows 1,466 Original Medicare patients and 6,305 services for Timothy J. Greenan. This counts Original Medicare only and measures volume, not quality.
- What is Timothy J. Greenan's NPI number?
- 1073562088. 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 Timothy J. Greenan, 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 | 1,466 |
|---|---|
| Services billed to Medicare | 6,305 |
| Different services or procedures | 34 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Injection, gadoterate meglumine, 0.1 ml (A9575)2,681 services
- Mri scan of leg joint without contrast (73721)1,313 services
- Mri scan of arm joint without contrast (73221)1,031 services
- Injection, gadobenate dimeglumine (multihance), per ml (A9577)473 services
- Mri scan of leg without contrast (73718)247 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 cholesterol75%
- Arthritis75%
- High blood pressure70%
- Diabetes25%
- Anxiety23%
- Ischemic heart disease22%
Practice locations
Addresses where Timothy J. Greenan is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 14; the Medicare profile lists all.
- 1 Stream CtOwings Mills, MD 21117
- 10215 Fernwood Rd, Suite 620Bethesda, MD 20817 (888) 601‑0943
- 10400 Odonnell Pl, Suite 100Waldorf, MD 20603 (410) 298‑0454
- 122 Defense Hwy, Suite 102Annapolis, MD 21401 (410) 571‑0350
- 130 Hospital Rd, Suite Ll100Prince Frederick, MD 20678 (410) 535‑4111
Group practices
Medicare enrollment lists Timothy J. Greenan as a member of these groups (CMS data updated October 2, 2026).
- Maryland Imaging Network PC81 clinicians in the group
- Community Radiology Associates Inc65 clinicians in the group
- Delaware Radiology Associates PA65 clinicians in the group
- Chesapeake Open Mri L L C18 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Owings Mills
Clinicians with the same Medicare primary specialty in Owings Mills, MD — not a recommendation.
Other clinicians in Maryland Imaging Network PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of Ny Upstate Medical University |
| Graduation year | 1986 (40 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1073562088 |
| 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