John Ostergaard, M.D.
NPI 1578536090 · Family Medicine Physician · Brookfield, WI
John Ostergaard, M.D. is a Family Medicine Physician provider in Brookfield, WI (NPI 1578536090).
Provider details
- NPI number
- 1578536090
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 28790 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 118 | 72 |
| Lisinopril | 86 | 49 |
| Simvastatin | 59 | 31 |
| Amlodipine Besylate | 52 | 32 |
| Metformin Hcl | 49 | 30 |
| Pantoprazole Sodium | 45 | 21 |
| Losartan Potassium | 45 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-08
- Last updated
- 2011-11-09
Frequently asked questions
- What is John Ostergaard's NPI number?
- John Ostergaard's National Provider Identifier (NPI) is 1578536090, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Ostergaard's specialty?
- John Ostergaard is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Ostergaard located?
- John Ostergaard's practice location on file with NPPES is 2085 N. Calhoun Road, Brookfield, WI 53005.
- What is John Ostergaard's phone number?
- The practice phone number listed in the NPPES registry for John Ostergaard is (262) 928-7100.
- Is John Ostergaard's NPI active?
- Yes — John Ostergaard's NPI (1578536090) is active in the NPPES registry as of the last update on 2011-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.