Robert B. Prehn, M.D.
Otolaryngology Physician · Neenah, WI
Robert B. Prehn, M.D. is an otolaryngology physician with a practice address in Neenah, Wisconsin, and NPI 1407859523, issued on May 23, 2005. Check the license (Wisconsin 33668-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Robert B. Prehn
- Credential
- M.D.
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License numbers
- 33668-20 WI
33668 WI
Self-reported in NPPES; status is on the state search - Practice location
- 119 E Bell St, Neenah, WI 54956
- Phone
- (920) 969-1768
- Enumerated
- May 23, 2005
- Record last updated
- Mar 10, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (920) 969-1788
- Medicaid ID
- 32243800 WI
- Medicare enrollment
- Enrolled (PECOS I20040304000520); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 1991
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 231 in Wisconsin → Look up another NPI →
Also registered at 119 E Bell St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Bechard, M.D.Otolaryngology Physician1306849443
- Kasey Boerner, APNPFamily Nurse Practitioner1477862902
- Larry Burton, MDOtolaryngology Physician1841226628
- Mark Conradt, AU.D.Audiologist1255334421
- Andrea Federman, AUDAudiologist1851303630
- Jessica Grzeca, AUDAudiologist1982616686
Verify Robert B. Prehn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 33668-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% fewer Medicare Part D claims than the average otolaryngology physician in 2024
491 Medicare Part D claims for 209 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 21 claims were for opioids.
Most prescribed
- Fluticasone Propionate100 claims
- Omeprazole72 claims
- Ipratropium Bromide44 claims
- Mometasone Furoate25 claims
- Famotidine22 claims
- Prednisone21 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: $36.73
2 payments; by number, the most common kind was food and beverage; the largest payer was Phathom Pharmaceuticals, Inc. The 6,429 providers of this specialty with any payment received $1,922.50 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
- Ear Nose And Throat Specialists OF Wisconsin SCNeenah, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert B. Prehn among 231 otolaryngology physician records in Wisconsin
Robert B. Prehn, M.D. is one of 231 otolaryngology physician records with a practice address in Wisconsin. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 87% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1991 · median 2004 among the 147 with a school on file
- Record last updated2017 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in Wisconsin
There are 231 otolaryngology physician records in Wisconsin.
All 231 in Wisconsin → Every provider in Neenah → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Robert Bechard, M.D.Neenah, WI 549561306849443
- Larry Burton, MDNeenah, WI 549561841226628
- Christopher Keller, M.D.Neenah, WI 549561437152568
- Rex Gromer, MDMenasha, WI 549521992384648
- Suhail Hariri, MDFond Du Lac, WI 549351942281068
- John Nash, M.D.Fond Du Lac, WI 549351225117245
- William Sybesma, MDFond Du Lac, WI 549351093798324
- Gregory Swanson, MDAppleton, WI 549151710971783
Common questions
What is Robert B. Prehn, M.D.'s NPI number?
Robert B. Prehn, M.D.'s National Provider Identifier (NPI) is 1407859523, issued on May 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert B. Prehn, M.D. located?
The NPPES record lists a practice address at 119 E Bell St, Neenah, WI, 54956. Phone: (920) 969-1768. Providers update this record themselves, so call before visiting.
How can I verify Robert B. Prehn, M.D.'s license?
NPPES lists Wisconsin license number 33668-20, 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 Robert B. Prehn, M.D. prescribe under Medicare Part D?
In 2024, Robert B. Prehn, M.D. had 491 Medicare Part D claims for 209 beneficiaries; the average among otolaryngology physician prescribers was 541. 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.