Margaret Lynch Nyhan, MD
NPI 1083658959 · Diagnostic Radiology Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Lynch Nyhan, MD is a Diagnostic Radiology Physician provider in Baltimore, MD (NPI 1083658959).
Provider details
- NPI number
- 1083658959
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- D0033666 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
3,222 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) |
|---|---|---|
| Dxa Bone Density Measurement of Hip, Pelvis, Spine77080 | 330 | $41 |
| X-Ray of Chest, 1 View71045 | 284 | $9 |
| Ct Scan of Chest Without Contrast71250 | 182 | $139 |
| X-Ray of Chest, 2 Views71046 | 173 | $35 |
| Dxa Bone Density Measurement of Forearm, Finger, Hand, Or Foot77081 | 173 | $33 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 107 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-15
- Last updated
- 2014-01-15
Frequently asked questions
- What is Margaret Lynch Nyhan's NPI number?
- Margaret Lynch Nyhan's National Provider Identifier (NPI) is 1083658959, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Lynch Nyhan's specialty?
- Margaret Lynch Nyhan is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Lynch Nyhan located?
- Margaret Lynch Nyhan's practice location on file with NPPES is 7253 Ambassador Rd, Baltimore, MD 21244-2710.
- What is Margaret Lynch Nyhan's phone number?
- The practice phone number listed in the NPPES registry for Margaret Lynch Nyhan is (443) 436-1116.
- Does Margaret Lynch Nyhan accept Medicare?
- Margaret Lynch Nyhan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Lynch Nyhan's NPI active?
- Yes — Margaret Lynch Nyhan's NPI (1083658959) is active in the NPPES registry as of the last update on 2014-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.