Quick answers
- Does Juliet M. Penn accept Medicare assignment?
- Yes. Medicare's clinician data says Juliet M. Penn 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 Juliet M. Penn see?
- In 2024, CMS data shows 502 Original Medicare patients and 137,509 services for Juliet M. Penn. This counts Original Medicare only and measures volume, not quality.
- What is Juliet M. Penn's NPI number?
- 1215175070. 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 Juliet M. Penn, 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 | 502 |
|---|---|
| Services billed to Medicare | 137,509 |
| Different services or procedures | 122 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Injection, darbepoetin alfa, 1 microgram (non-esrd use) (J0881)10,600 services
- Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) (Q0138)10,200 services
- Injection, fosaprepitant, 1 mg (J1453)9,750 services
- Injection, denosumab, 1 mg (J0897)6,600 services
- Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) (J0129)3,450 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 cholesterol74%
- High blood pressure62%
- Arthritis55%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)50%
- Osteoporosis30%
- Ischemic heart disease27%
Hospitals where Juliet M. Penn works
Medicare's Facility Affiliation Data lists Juliet M. Penn 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.
- Goleta Valley Cottage HospitalSanta Barbara, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050357
- Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050262
- Santa Barbara Cottage HospitalSanta Barbara, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050396
- Santa Ynez Valley Cottage HospitalSolvang, CA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 051331
Practice locations
Addresses where Juliet M. Penn is enrolled with Medicare (CMS data updated October 2, 2026).
- 111 E Victoria StSanta Barbara, CA 93101
- 2020 Santa Monica Blvd, Suite 210Santa Monica, CA 90404 (310) 458‑2381
- 5383 Hollister Ave, Suite 160Goleta, CA 93111 (805) 565‑0020
Group practices
Medicare enrollment lists Juliet M. Penn as a member of this group (CMS data updated October 2, 2026).
- The Regents of the University of California1,462 clinicians in the group
Specialties
- Medical Oncologyprimary
Other oncologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Other clinicians in The Regents of the University of California
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2005 (21 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) | 1215175070 |
| 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