John Oppenheimer, M.D.
NPI 1174507545 · Anesthesiology Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Oppenheimer, M.D. is a Anesthesiology Physician provider in Milwaukee, WI (NPI 1174507545).
Provider details
- NPI number
- 1174507545
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 29658-020 (WI)
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
51 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) |
|---|---|---|
| Injection of Anesthetic Agent And/Or Steroid Into Thigh Nerve (femoral Nerve)64447 | 51 | $59 |
Typical Medicare-allowed amounts for these services range $59–$59 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-30
- Last updated
- 2009-02-15
Frequently asked questions
- What is John Oppenheimer's NPI number?
- John Oppenheimer's National Provider Identifier (NPI) is 1174507545, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Oppenheimer's specialty?
- John Oppenheimer is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Oppenheimer located?
- John Oppenheimer's practice location on file with NPPES is 2323 N Lake Dr, Milwaukee, WI 53211-4508.
- What is John Oppenheimer's phone number?
- The practice phone number listed in the NPPES registry for John Oppenheimer is (414) 291-1000.
- Does John Oppenheimer accept Medicare?
- John Oppenheimer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Oppenheimer's NPI active?
- Yes — John Oppenheimer's NPI (1174507545) is active in the NPPES registry as of the last update on 2009-02-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.