Quick answers
- Does Dianna L. Lange accept Medicare assignment?
- Yes. Medicare's clinician data says Dianna L. Lange 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 Dianna L. Lange see?
- In 2024, CMS data shows 213 Original Medicare patients and 239 services for Dianna L. Lange. This counts Original Medicare only and measures volume, not quality.
- What is Dianna L. Lange's NPI number?
- 1245666981. 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 Dianna L. Lange, 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 | 213 |
|---|---|
| Services billed to Medicare | 239 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)126 services
- Emergency department visit with moderate level of medical decision making (99284)83 services
- Critical care, first 30-74 minutes (99291)13 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%
- Diabetes51%
- Arthritis49%
- Ischemic heart disease39%
- Anxiety36%
Hospitals where Dianna L. Lange works
Medicare's Facility Affiliation Data lists Dianna L. Lange 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.
- St Johns Regional Medical CenterOxnard, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050082
Practice locations
Addresses where Dianna L. Lange is enrolled with Medicare (CMS data updated October 2, 2026).
- 1600 N Rose AveOxnard, CA 93030 (805) 988‑2500
- 5652 Calle RealGoleta, CA 93117 (805) 879‑4239
Group practices
Medicare enrollment lists Dianna L. Lange as a member of these groups (CMS data updated October 2, 2026).
- Cep America - California1,292 clinicians in the group
- Cottage Clinical Network LLC56 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Oxnard
Clinicians with the same Medicare primary specialty in Oxnard, CA — not a recommendation.
Other clinicians in Cep America - California
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2013 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245666981 |
| 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