John Frey, DO
NPI 1538600754 · Pulmonary Disease Physician · La Crosse, WI
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Frey, DO is a Pulmonary Disease Physician provider in La Crosse, WI (NPI 1538600754).
Provider details
- NPI number
- 1538600754
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 94-09289 (KS)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
779 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 159 | $90 |
| Critical Care, First 30-74 Minutes99291 | 139 | $195 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 107 | $15 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 92 | $8 |
| Test to Determine Lung Volumes Using Sensors94726 | 74 | $11 |
| Test to Measure Expiratory Airflow and Volume Changes Before and After Medication Administration94060 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tiotropium Br/Olodaterol Hclbrand: Stiolto Respimat | 84 | 21 |
| Budesonide/Glycopyr/Formoterolbrand: Breztri Aerosphere | 80 | 24 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 74 | 36 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 65 | 20 |
| Fluticasone Propion/Salmeterolbrand: Fluticasone-Salmeterol | 52 | 12 |
| Prednisone | 47 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,073 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 3901 Rainbow BlvdKansas City, KS 66160-8500Phone: (608) 558-2996
Registry dates
- Enumerated
- 2017-03-20
- Last updated
- 2023-09-08
- Certified
- 2023-09-08
Frequently asked questions
- What is John Frey's NPI number?
- John Frey's National Provider Identifier (NPI) is 1538600754, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Frey's specialty?
- John Frey is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is John Frey located?
- John Frey's practice location on file with NPPES is 700 West Ave South, La Crosse, WI 54601-8806.
- What is John Frey's phone number?
- The practice phone number listed in the NPPES registry for John Frey is (608) 785-0940.
- Does John Frey accept Medicare?
- John Frey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Frey's NPI active?
- Yes — John Frey's NPI (1538600754) is active in the NPPES registry as of the last update on 2023-09-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.