Quick answers
- Does Karin I. Harp accept Medicare assignment?
- Yes. Medicare's clinician data says Karin I. Harp 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 Karin I. Harp see?
- In 2024, CMS data shows 516 Original Medicare patients and 5,212 services for Karin I. Harp. This counts Original Medicare only and measures volume, not quality.
- What is Karin I. Harp's NPI number?
- 1518923374. 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 Karin I. Harp, 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 | 516 |
|---|---|
| Services billed to Medicare | 5,212 |
| Different services or procedures | 76 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)1,089 services
- Obtaining data needed to develop the optimal radiation treatment, 1 treatment area (77280)569 services
- Ultrasonic guidance for placement of radiation therapy fields (G6001)568 services
- Superficial and/or low voltage radiation treatment delivery (77401)561 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)444 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 pressure59%
- Arthritis49%
- Ischemic heart disease28%
- Osteoporosis27%
- Anxiety19%
Hospitals where Karin I. Harp works
Medicare's Facility Affiliation Data lists Karin I. Harp at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Northridge Hospital Medical CenterNorthridge, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050116
Practice locations
Addresses where Karin I. Harp 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 Karin I. Harp as a member of this group (CMS data updated October 2, 2026).
- Karin I Harp MD Inc8 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists 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 | MD |
|---|---|
| Medical school | University Of Washington School Of Medicine |
| Graduation year | 2001 (25 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1518923374 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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