Harold Oster, MD
NPI 1417915695 · Internal Medicine Physician · Plymouth, MN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Harold Oster, MD is a Internal Medicine Physician provider in Plymouth, MN (NPI 1417915695).
Provider details
- NPI number
- 1417915695
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 46603 (MN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
44 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 22 | $9 |
| Blood Test, Basic Group of Blood Chemicals (calcium, Total)80048 | 11 | $8 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test85027 | 11 | $6 |
Typical Medicare-allowed amounts for these services range $6–$9 (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 · 53 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 250 | 123 |
| Amlodipine Besylate | 160 | 80 |
| Lisinopril | 111 | 54 |
| Rosuvastatin Calcium | 109 | 60 |
| Losartan Potassium | 103 | 61 |
| Metoprolol Succinate | 100 | 51 |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-03
- Last updated
- 2021-03-11
- Certified
- 2021-03-11
Frequently asked questions
- What is Harold Oster's NPI number?
- Harold Oster's National Provider Identifier (NPI) is 1417915695, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harold Oster's specialty?
- Harold Oster is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Harold Oster located?
- Harold Oster's practice location on file with NPPES is 2855 Campus Dr, Plymouth, MN 55441-2659.
- What is Harold Oster's phone number?
- The practice phone number listed in the NPPES registry for Harold Oster is (763) 577-7400.
- Does Harold Oster accept Medicare?
- Harold Oster is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Harold Oster's NPI active?
- Yes — Harold Oster's NPI (1417915695) is active in the NPPES registry as of the last update on 2021-03-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.