Quick answers
- Does Jenny S. Oh accept Medicare assignment?
- Yes. Medicare's clinician data says Jenny S. Oh 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 Jenny S. Oh see?
- In 2024, CMS data shows 618 Original Medicare patients and 99,943 services for Jenny S. Oh. This counts Original Medicare only and measures volume, not quality.
- What is Jenny S. Oh's NPI number?
- 1386657856. 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 Jenny S. Oh, 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 | 618 |
|---|---|
| Services billed to Medicare | 99,943 |
| Different services or procedures | 116 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, tocilizumab, 1 mg (J3262)36,448 services
- Injection, romosozumab-aqqg, 1 mg (J3111)16,590 services
- Injection, golimumab, 1 mg, for intravenous use (J1602)10,250 services
- Injection, denosumab, 1 mg (J0897)4,140 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)3,361 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%
- Arthritis75%
- Osteoporosis46%
- Ischemic heart disease38%
- Diabetes31%
Hospitals where Jenny S. Oh works
Medicare's Facility Affiliation Data lists Jenny S. Oh 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.
- Providence Cedars Sinai Tarzana Medical CenterTarzana, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050761
Practice locations
Addresses where Jenny S. Oh is enrolled with Medicare (CMS data updated October 2, 2026).
- 18386 Ventura BlvdTarzana, CA 91356 (818) 996‑4077
Group practices
Medicare enrollment lists Jenny S. Oh as a member of this group (CMS data updated October 2, 2026).
- Boris D Ratiner, MD, Inc6 clinicians in the group
Specialties
- Rheumatologyprimary
- Internal Medicinealso
Other rheumatologists in Tarzana
Clinicians with the same Medicare primary specialty in Tarzana, CA — not a recommendation.
Other clinicians in Boris D Ratiner, MD, Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York At Buffalo School Of Medicine |
| Graduation year | 1998 (28 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) | 1386657856 |
| 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