John William Frey, DO
Pulmonary Disease Physician · La Crosse, WI
John William Frey, DO is a pulmonary disease physician with a practice address in La Crosse, Wisconsin, and NPI 1538600754, issued on Mar 20, 2017. Check the license (Wisconsin 81144, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John William Frey
- Credential
- DO
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License numbers
- 81144 WI
94-09289 KS
Self-reported in NPPES; status is on the state search - Practice location
- 700 West Ave South, La Crosse, WI 54601
- Phone
- (608) 785-0940
- Enumerated
- Mar 20, 2017
- Record last updated
- Sep 8, 2023
- Medicare enrollment
- Enrolled (PECOS I20230530001917); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 300 in Wisconsin → Look up another NPI →
Also registered at 700 West Ave South
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John William Frey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 81144Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average pulmonary disease physician in 2024
739 Medicare Part D claims for 161 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 58% of claims.
Most prescribed
- Stiolto Respimat84 claims
- Breztri Aerosphere80 claims
- Albuterol Sulfate Hfa74 claims
- Trelegy Ellipta65 claims
- Fluticasone-Salmeterol52 claims
- Prednisone47 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $3,072.68
6 payments; by number, the most common kind was travel and lodging; the largest payer was Intuitive Surgical, Inc. The 8,806 providers of this specialty with any payment received $5,159.88 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mayo Clinic Health System-Southwest Wisconsin Region IncLa Crosse, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John William Frey among 300 pulmonary disease physician records in Wisconsin
John William Frey, DO is one of 300 pulmonary disease physician records with a practice address in Wisconsin. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 84% of them.
- NPI issued2017 · 84% of these records are older, 10% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2017 · median 2003 among the 220 with a school on file
- Record last updated2023 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in Wisconsin
There are 300 pulmonary disease physician records in Wisconsin.
All 300 in Wisconsin → Every provider in La Crosse → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Mais AbdouLa Crosse, WI 546011326572066
- Vijay Bandhakavi, MDLa Crosse, WI 546011184887473
- June Chae, M.D.La Crosse, WI 546011245529718
- Zachary Clements, D.O.La Crosse, WI 546011689933434
- Daniel Deetz, MDLa Crosse, WI 546011699758730
- Hafiz FakihLa Crosse, WI 546011730434119
- Brian Hagan, MDLa Crosse, WI 546011225033822
- Vikas KoppurapuLa Crosse, WI 546011235512922
Common questions
What is John William Frey, DO's NPI number?
John William Frey, DO's National Provider Identifier (NPI) is 1538600754, issued on Mar 20, 2017. An NPI identifies a provider in billing; it is not a license.
Where is John William Frey, DO located?
The NPPES record lists a practice address at 700 West Ave South, La Crosse, WI, 54601. Phone: (608) 785-0940. Providers update this record themselves, so call before visiting.
How can I verify John William Frey, DO's license?
NPPES lists Wisconsin license number 81144, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John William Frey, DO prescribe under Medicare Part D?
In 2024, John William Frey, DO had 739 Medicare Part D claims for 161 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.