Quick answers
- Does Rejan C. McCaskill accept Medicare assignment?
- Yes. Medicare's clinician data says Rejan C. McCaskill 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 Rejan C. McCaskill see?
- In 2024, CMS data shows 128 Original Medicare patients and 779 services for Rejan C. McCaskill. This counts Original Medicare only and measures volume, not quality.
- What is Rejan C. McCaskill's NPI number?
- 1790852606. 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 Rejan C. McCaskill, 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 | 128 |
|---|---|
| Services billed to Medicare | 779 |
| Different services or procedures | 28 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)262 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)133 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)97 services
- Administration of influenza virus vaccine (G0008)56 services
- Annual depression screening, 5 to 15 minutes (G0444)50 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 pressure69%
- Arthritis44%
- Osteoporosis30%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)21%
- Chronic kidney disease17%
Hospitals where Rejan C. McCaskill works
Medicare's Facility Affiliation Data lists Rejan C. McCaskill 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.
- Hoag Memorial Hospital PresbyterianNewport Beach, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050224
Practice locations
Addresses where Rejan C. McCaskill is enrolled with Medicare (CMS data updated October 2, 2026).
- 320 Superior Ave, Suite 330Newport Beach, CA 92663 (949) 791‑2000
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Newport Beach
Clinicians with the same Medicare primary specialty in Newport Beach, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Irvine, California College Of Medicine |
| Graduation year | 1999 (27 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1790852606 |
| 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