Quick answers
- Does Mary K. Hartnett accept Medicare assignment?
- Yes. Medicare's clinician data says Mary K. Hartnett 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 K. Hartnett see?
- In 2024, CMS data shows 27 Original Medicare patients and 4,351 services for Mary K. Hartnett. This counts Original Medicare only and measures volume, not quality.
- What is Mary K. Hartnett's NPI number?
- 1447936034. 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 K. Hartnett, 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 | 27 |
|---|---|
| Services billed to Medicare | 4,351 |
| Different services or procedures | 10 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Injection, testosterone cypionate, 1 mg (J1071)3,856 services
- Injection of drug or substance under skin or into muscle (96372)292 services
- Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg (J3420)104 services
- Injection, depo-estradiol cypionate, up to 5 mg (J1000)86 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 cholesterol59%
- High blood pressure44%
Practice locations
Addresses where Mary K. Hartnett is enrolled with Medicare (CMS data updated October 2, 2026).
- 3601 W 133rd StLeawood, KS 66209 (913) 787‑3728
Group practices
Medicare enrollment lists Mary K. Hartnett as a member of this group (CMS data updated October 2, 2026).
- Optimal Health and Wellness LLC5 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Leawood
Clinicians with the same Medicare primary specialty in Leawood, KS — not a recommendation.
Other clinicians in Optimal Health and Wellness LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| School | University Of Missouri, Columbia School Of Medicine |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447936034 |
| 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