Quick answers
- Does Debra G. Tennen accept Medicare assignment?
- Medicare's clinician data says Debra G. Tennen may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Debra G. Tennen see?
- In 2024, CMS data shows 388 Original Medicare patients and 1,243 services for Debra G. Tennen. This counts Original Medicare only and measures volume, not quality.
- What is Debra G. Tennen's NPI number?
- 1366418865. 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 Debra G. Tennen, 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 | 388 |
|---|---|
| Services billed to Medicare | 1,243 |
| Different services or procedures | 33 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient problem focused exam of visual system (92012)472 services
- Established patient complete exam of visual system (92014)252 services
- Closure of tear duct opening using plug (68761)125 services
- Imaging of retina (92134)77 services
- Imaging of optic nerve (92133)46 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 pressure63%
- Arthritis54%
- Ischemic heart disease34%
- Diabetes27%
- Osteoporosis25%
Practice locations
Addresses where Debra G. Tennen is enrolled with Medicare (CMS data updated October 2, 2026).
- 7320 Woodlake Ave, Suite 190West Hills, CA 91307 (818) 883‑0112
Group practices
Medicare enrollment lists Debra G. Tennen as a member of this group (CMS data updated October 2, 2026).
- Jonathan M. Davidorf, M.D. Inc.6 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in West Hills
Clinicians with the same Medicare primary specialty in West Hills, CA — not a recommendation.
Other clinicians in Jonathan M. Davidorf, M.D. Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1366418865 |
| 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