Timothy Greenan, M.D.
NPI 1073562088 · Diagnostic Radiology Physician · Rockville, MD
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Greenan, M.D. is a Diagnostic Radiology Physician provider in Rockville, MD (NPI 1073562088).
Provider details
- NPI number
- 1073562088
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD044122E (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Other Service Providers
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,961 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Mri Scan of Leg Joint Without Contrast73721 | 1,313 | $106 |
| Mri Scan of Arm Joint Without Contrast73221 | 1,031 | $108 |
| Mri Scan of Leg Without Contrast73718 | 247 | $122 |
| Mri Scan of Lower Spinal Canal Without Contrast72148 | 116 | $131 |
| Mri Scan of Brain Without Contrast70551 | 68 | $158 |
| Mri Scan of Upper Spinal Canal Without Contrast72141 | 56 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-08
- Last updated
- 2021-10-15
- Certified
- 2021-10-15
Frequently asked questions
- What is Timothy Greenan's NPI number?
- Timothy Greenan's National Provider Identifier (NPI) is 1073562088, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Greenan's specialty?
- Timothy Greenan is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Greenan located?
- Timothy Greenan's practice location on file with NPPES is 14915 Broschart Road, Rockville, MD 20850.
- What is Timothy Greenan's phone number?
- The practice phone number listed in the NPPES registry for Timothy Greenan is (301) 251-7897.
- Does Timothy Greenan accept Medicare?
- Timothy Greenan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Greenan's NPI active?
- Yes — Timothy Greenan's NPI (1073562088) is active in the NPPES registry as of the last update on 2021-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.