Nathan Zwagerman, M.D.
NPI 1689970543 · Neurological Surgery Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Neurosurgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Zwagerman, M.D. is a Neurological Surgery Physician provider in Milwaukee, WI (NPI 1689970543).
Provider details
- NPI number
- 1689970543
- Entity type
- Individual
- Primary specialty
- Neurological Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 66696 (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
15 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
223 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 Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 50 | $33 |
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 | 48 | $33 |
| Computer-Assisted Procedure Inside Brain61781 | 39 | $199 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 30 | $123 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 19 | $62 |
| Use of Operating Microscope69990 | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-02-09
- Last updated
- 2018-10-05
Frequently asked questions
- What is Nathan Zwagerman's NPI number?
- Nathan Zwagerman's National Provider Identifier (NPI) is 1689970543, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Zwagerman's specialty?
- Nathan Zwagerman is listed in the NPPES registry with a primary specialty of Neurological Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Nathan Zwagerman located?
- Nathan Zwagerman's practice location on file with NPPES is 9200 W Wisconsin Ave, Milwaukee, WI 53226-3522.
- What is Nathan Zwagerman's phone number?
- The practice phone number listed in the NPPES registry for Nathan Zwagerman is (414) 805-5400.
- Does Nathan Zwagerman accept Medicare?
- Nathan Zwagerman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Zwagerman's NPI active?
- Yes — Nathan Zwagerman's NPI (1689970543) is active in the NPPES registry as of the last update on 2018-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.