Quick answers
- Does Mary A. Dennis accept Medicare assignment?
- Yes. Medicare's clinician data says Mary A. Dennis 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 Mary A. Dennis see?
- In 2024, CMS data shows 241 Original Medicare patients and 1,894 services for Mary A. Dennis. This counts Original Medicare only and measures volume, not quality.
- What is Mary A. Dennis's NPI number?
- 1417423369. 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 Mary A. Dennis, 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 | 241 |
|---|---|
| Services billed to Medicare | 1,894 |
| Different services or procedures | 15 |
| Participating Medicare provider | Yes |
| Average age of these patients | 79 |
Most frequent services
- Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)838 services
- Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)455 services
- Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)171 services
- Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month (99439)89 services
- Advance care planning, first 30 minutes (99497)89 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 cholesterol67%
- Depression66%
- Arthritis61%
- Anxiety60%
- Alzheimer's disease or dementia52%
Practice locations
Addresses where Mary A. Dennis is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Ford PlDetroit, MI 48202
- 100 Michigan St NE Mc, Suite 845Grand Rapids, MI 49503
- 205 N E AveJackson, MI 49201
- 5410 Maryland Way, Suite 300Brentwood, TN 37027
- PO BoxDetroit, MI 48277
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Detroit
Clinicians with the same Medicare primary specialty in Detroit, MI — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1417423369 |
| 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