Stephanie Ossowski
NPI 1417301482 · Hematology & Oncology Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephanie Ossowski is a Hematology & Oncology Physician provider in San Diego, CA (NPI 1417301482).
Provider details
- NPI number
- 1417301482
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
16 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 16 | $137 |
Typical Medicare-allowed amounts for these services range $137–$137 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 156 | 62 |
| Dexamethasone | 146 | 48 |
| Lenalidomide | 135 | 24 |
| Acyclovir | 89 | 22 |
| Gabapentin | 76 | 20 |
| Zanubrutinibbrand: Brukinsa | 76 | — |
| Rivaroxabanbrand: Xarelto | 64 | — |
| Ondansetron Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-04-15
- Last updated
- 2025-06-20
- Certified
- 2025-06-20
Frequently asked questions
- What is Stephanie Ossowski's NPI number?
- Stephanie Ossowski's National Provider Identifier (NPI) is 1417301482, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephanie Ossowski's specialty?
- Stephanie Ossowski is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephanie Ossowski located?
- Stephanie Ossowski's practice location on file with NPPES is 4647 Zion Ave, San Diego, CA 92120-2507.
- What is Stephanie Ossowski's phone number?
- The practice phone number listed in the NPPES registry for Stephanie Ossowski is (877) 236-0333.
- Does Stephanie Ossowski accept Medicare?
- Stephanie Ossowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephanie Ossowski's NPI active?
- Yes — Stephanie Ossowski's NPI (1417301482) is active in the NPPES registry as of the last update on 2025-06-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.