Nathan Grunewald
NPI 1396044509 · Urology Physician · Prairie Du Sac, WI
Enrolled with Medicare as Practitioner - Urology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Grunewald is a Urology Physician provider in Prairie Du Sac, WI (NPI 1396044509).
Provider details
- NPI number
- 1396044509
- Entity type
- Individual
- Primary specialty
- Urology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 57602-20 (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
442 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 146 | $63 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 83 | $93 |
| Diagnostic Exam of Bladder and Urethra Using an Endoscope52000 | 69 | $74 |
| Electronic Assessment of Bladder Emptying51741 | 57 | $6 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 38 | $137 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 98 | 42 |
| Nitrofurantoin Macrocrystalbrand: Nitrofurantoin | 52 | 17 |
| Finasteride | 41 | 14 |
| Mirabegronbrand: Myrbetriq | 33 | — |
| Oxybutynin Chloridebrand: Oxybutynin Chloride Er | 28 | — |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 20 | 19 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-03-28
- Last updated
- 2021-03-24
- Certified
- 2021-03-24
Frequently asked questions
- What is Nathan Grunewald's NPI number?
- Nathan Grunewald's National Provider Identifier (NPI) is 1396044509, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Grunewald's specialty?
- Nathan Grunewald is listed in the NPPES registry with a primary specialty of Urology Physician (Allopathic & Osteopathic Physicians).
- Where is Nathan Grunewald located?
- Nathan Grunewald's practice location on file with NPPES is 260 26th St, Prairie Du Sac, WI 53578-2203.
- What is Nathan Grunewald's phone number?
- The practice phone number listed in the NPPES registry for Nathan Grunewald is (608) 643-3311.
- Does Nathan Grunewald accept Medicare?
- Nathan Grunewald is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Grunewald's NPI active?
- Yes — Nathan Grunewald's NPI (1396044509) is active in the NPPES registry as of the last update on 2021-03-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.