Quick answers
- Does Mary Hanna accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Hanna 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 Hanna see?
- In 2024, CMS data shows 178 Original Medicare patients and 1,333 services for Mary Hanna. This counts Original Medicare only and measures volume, not quality.
- What is Mary Hanna's NPI number?
- 1396198479. 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 Hanna, 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 | 178 |
|---|---|
| Services billed to Medicare | 1,333 |
| Different services or procedures | 30 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)562 services
- Destruction of precancer skin growth, 1 growth (17000)183 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)152 services
- Biopsy of related skin growth, first growth (11102)94 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)74 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 pressure55%
- Arthritis50%
- Ischemic heart disease27%
- Diabetes22%
- Osteoporosis21%
Practice locations
Addresses where Mary Hanna is enrolled with Medicare (CMS data updated October 2, 2026).
- 32144 Agoura Rd, Suite 112Westlake Village, CA 91361 (818) 889‑2739
Group practices
Medicare enrollment lists Mary Hanna as a member of this group (CMS data updated October 2, 2026).
- Karin I Harp MD Inc8 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Westlake Village
Clinicians with the same Medicare primary specialty in Westlake Village, CA — not a recommendation.
Other clinicians in Karin I Harp MD Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2016 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396198479 |
| 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