Quick answers
- Does Michael Mardiney Iii accept Medicare assignment?
- Yes. Medicare's clinician data says Michael Mardiney Iii 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 Michael Mardiney Iii see?
- In 2024, CMS data shows 536 Original Medicare patients and 58,714 services for Michael Mardiney Iii. This counts Original Medicare only and measures volume, not quality.
- What is Michael Mardiney Iii's NPI number?
- 1609827724. 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 Michael Mardiney Iii, 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 | 536 |
|---|---|
| Services billed to Medicare | 58,714 |
| Different services or procedures | 28 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Injection, omalizumab, 5 mg (J2357)20,355 services
- Professional service for preparation and provision of 1 or more antigens (95165)5,980 services
- Professional service for single injection of allergen (95115)4,960 services
- Test for allergy using allergenic extract injected into skin (95024)4,361 services
- Injection, benralizumab, 1 mg (J0517)3,240 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%
- High blood pressure69%
- Arthritis52%
- Asthma51%
- Diabetes24%
- Anxiety24%
Practice locations
Addresses where Michael Mardiney Iii is enrolled with Medicare (CMS data updated October 2, 2026).
- 3105 N Ridge RdEllicott City, MD 21043 (410) 461‑7660
Specialties
- Allergy/Immunologyprimary
Other allergist and immunologists in Maryland
Clinicians with the same Medicare primary specialty in Maryland — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Georgetown University School Of Medicine |
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1609827724 |
| 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