John Gietzen, D.O.
NPI 1538178025 · Family Medicine Physician · New Glarus, WI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Gietzen, D.O. is a Family Medicine Physician provider in New Glarus, WI (NPI 1538178025).
Provider details
- NPI number
- 1538178025
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 4158 (AZ)
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
19 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
8,127 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) |
|---|---|---|
| Subsequent Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, at Least 45 Minutes99310 | 4,467 | $137 |
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 1,093 | $116 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 869 | $96 |
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 367 | $43 |
| Residence Visit for Established Patient With Low Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99348 | 270 | $67 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 240 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,244 | 146 |
| Levothyroxine Sodium | 925 | 99 |
| Amlodipine Besylate | 820 | 99 |
| Apixabanbrand: Eliquis | 649 | 64 |
| Furosemide | 646 | 94 |
| Sertraline Hcl | 627 | 70 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-05
- Last updated
- 2022-11-28
- Certified
- 2022-11-28
Frequently asked questions
- What is John Gietzen's NPI number?
- John Gietzen's National Provider Identifier (NPI) is 1538178025, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Gietzen's specialty?
- John Gietzen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Gietzen located?
- John Gietzen's practice location on file with NPPES is W5491 Windmill Ridge Rd, New Glarus, WI 53574-9489.
- What is John Gietzen's phone number?
- The practice phone number listed in the NPPES registry for John Gietzen is (608) 518-3654.
- Does John Gietzen accept Medicare?
- John Gietzen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Gietzen's NPI active?
- Yes — John Gietzen's NPI (1538178025) is active in the NPPES registry as of the last update on 2022-11-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.