Madeleine Oster, DNP, NP
NPI 1023654084 · Nurse Practitioner · Stanford, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Madeleine Oster, DNP, NP is a Nurse Practitioner provider in Stanford, CA (NPI 1023654084).
Provider details
- NPI number
- 1023654084
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- DNP, NP
- Sex
- Female
- Sole proprietor
- No
- License
- 95013926 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
6 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
827 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 357 | $184 |
| Prolonged Office Or Other Outpatient Evaluation and Management Service(s) Beyond the Maximum Required Time of the Primary Procedure Which Has Been Selected Using Total Time on the Date of the Primary Service; Each Additional 15 Minutes By the Physician OrG2212 | 164 | $32 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 85 | $16 |
| Programming of Dual Lead Pacemaker System93280 | 49 | $35 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 43 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 112 | 31 |
| Metoprolol Succinate | 74 | 30 |
| Flecainide Acetate | 47 | 13 |
| Rivaroxabanbrand: Xarelto | 44 | 12 |
| Diltiazem Hclbrand: Diltiazem 24hr Er (cd) | 19 | — |
| Amiodarone Hcl | 19 | 11 |
| Sotalol Hclbrand: Sotalol |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-11-25
- Last updated
- 2025-12-30
- Certified
- 2025-12-30
Frequently asked questions
- What is Madeleine Oster's NPI number?
- Madeleine Oster's National Provider Identifier (NPI) is 1023654084, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Madeleine Oster's specialty?
- Madeleine Oster is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Madeleine Oster located?
- Madeleine Oster's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Madeleine Oster's phone number?
- The practice phone number listed in the NPPES registry for Madeleine Oster is (650) 723-4000.
- Does Madeleine Oster accept Medicare?
- Madeleine Oster is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Madeleine Oster's NPI active?
- Yes — Madeleine Oster's NPI (1023654084) is active in the NPPES registry as of the last update on 2025-12-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.