Quick answers
- Does Justin P. Holiwell accept Medicare assignment?
- Yes. Medicare's clinician data says Justin P. Holiwell 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 Justin P. Holiwell see?
- In 2024, CMS data shows 100 Original Medicare patients and 108 services for Justin P. Holiwell. This counts Original Medicare only and measures volume, not quality.
- What is Justin P. Holiwell's NPI number?
- 1912540592. 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 Justin P. Holiwell, 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 | 100 |
|---|---|
| Services billed to Medicare | 108 |
| Different services or procedures | 13 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)32 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)24 services
- Emergency department visit with moderate level of medical decision making (99284)17 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 blood pressure75%
- High cholesterol75%
- Arthritis54%
- Stroke or mini-stroke40%
- Ischemic heart disease35%
- Diabetes34%
Hospitals where Justin P. Holiwell works
Medicare's Facility Affiliation Data lists Justin P. Holiwell 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.
- Santa Barbara Cottage HospitalSanta Barbara, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050396
Practice locations
Addresses where Justin P. Holiwell is enrolled with Medicare (CMS data updated October 2, 2026).
- 215 Pesetas LnSanta Barbara, CA 93110 (805) 681‑7800
Group practices
Medicare enrollment lists Justin P. Holiwell as a member of this group (CMS data updated October 2, 2026).
- Sansum Clinic320 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Santa Barbara
Clinicians with the same Medicare primary specialty in Santa Barbara, CA — not a recommendation.
Other clinicians in Sansum Clinic
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1912540592 |
| 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