Quick answers
- Does Margaret A. Lynch Nyhan accept Medicare assignment?
- Yes. Medicare's clinician data says Margaret A. Lynch Nyhan 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 Margaret A. Lynch Nyhan see?
- In 2024, CMS data shows 2,810 Original Medicare patients and 23,164 services for Margaret A. Lynch Nyhan. This counts Original Medicare only and measures volume, not quality.
- What is Margaret A. Lynch Nyhan's NPI number?
- 1083658959. 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 Margaret A. Lynch Nyhan, 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 | 2,810 |
|---|---|
| Services billed to Medicare | 23,164 |
| Different services or procedures | 197 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)19,330 services
- Dxa bone density measurement of hip, pelvis, spine (77080)330 services
- X-ray of chest, 1 view (71045)284 services
- X-ray of chest, 2 views (71046)261 services
- Ct scan of chest without contrast (71250)208 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%
- Arthritis60%
- Ischemic heart disease35%
- Diabetes34%
- Anxiety32%
Practice locations
Addresses where Margaret A. Lynch Nyhan is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 30; the Medicare profile lists all.
- 104 Plumtree RdBel Air, MD 21015
- 116 Defense Hwy, Suite Ll100Annapolis, MD 21401
- 1209 York Rd, Suite 100Lutherville, MD 21093
- 122 Defense Hwy, Suite 102Annapolis, MD 21401 (888) 972‑9700
- 124 Sister Pierre DrTowson, MD 21204
Group practices
Medicare enrollment lists Margaret A. Lynch Nyhan as a member of this group (CMS data updated October 2, 2026).
- Advanced Radiology P A188 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Bel Air
Clinicians with the same Medicare primary specialty in Bel Air, MD — not a recommendation.
Other clinicians in Advanced Radiology P A
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1978 (48 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1083658959 |
| 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