Quick answers
- Does Karen D. Allen accept Medicare assignment?
- Yes. Medicare's clinician data says Karen D. Allen 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 Karen D. Allen see?
- In 2024, CMS data shows 623 Original Medicare patients and 3,173 services for Karen D. Allen. This counts Original Medicare only and measures volume, not quality.
- What is Karen D. Allen's NPI number?
- 1942200183. 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 Karen D. Allen, 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 | 623 |
|---|---|
| Services billed to Medicare | 3,173 |
| Different services or procedures | 63 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)1,080 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)637 services
- Destruction of precancer skin growth, 1 growth (17000)423 services
- Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)305 services
- Destruction of skin growth, 1-14 growths (17110)238 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 cholesterol72%
- High blood pressure59%
- Arthritis42%
- Ischemic heart disease20%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)20%
- Osteoporosis16%
Practice locations
Addresses where Karen D. Allen is enrolled with Medicare (CMS data updated October 2, 2026).
- 715 Tank Farm RdSan Luis Obispo, CA 93401 (805) 543‑5577
Specialties
- Dermatologyprimary
Other dermatologists in San Luis Obispo
Clinicians with the same Medicare primary specialty in San Luis Obispo, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Irvine, California College Of Medicine |
| Graduation year | 1996 (30 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1942200183 |
| 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