Timothy Dettmer, M.D.
Otolaryngology Physician · Mason City, IA
Timothy Dettmer, M.D. is an otolaryngology physician with a practice address in Mason City, Iowa, and NPI 1275527111, issued on Sep 7, 2005. Check the license (Iowa 35965, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Timothy Dettmer
- Credential
- M.D.
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- 35965 IA
Self-reported in NPPES; status is on the state search - Practice location
- 250 S Crescent Dr, Mason City, IA 50401
- Phone
- (641) 494-5380
- Enumerated
- Sep 7, 2005
- Record last updated
- Jan 9, 2024
- Fax
- (641) 494-5381
- Medicare enrollment
- Enrolled (PECOS I20050712000295); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 145 in Iowa → Look up another NPI →
Also registered at 250 S Crescent Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Andrea Anderson, PMHNPPsychiatric/Mental Health Nurse Practitioner1760065023
- Byron Beasley, MDCardiovascular Disease Physician1053398180
- Donald Beitzel, P.A.Physician Assistant1518939982
- Gregory Blank, PAPhysician Assistant1831161736
- Chad Boyer, PA-CPhysician Assistant1265638829
Verify Timothy Dettmer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 35965Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% more Medicare Part D claims than the average otolaryngology physician in 2024
634 Medicare Part D claims for 261 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 35 claims were for opioids.
Most prescribed
- Ipratropium Bromide134 claims
- Amoxicillin-Clavulanate Potass78 claims
- Azelastine Hcl61 claims
- Fluticasone Propionate45 claims
- Hydrocodone-Acetaminophen31 claims
- Mupirocin29 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: $280.64
7 payments; by number, the most common kind was food and beverage; the largest payer was Inspire Medical Systems, 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 3 group practices
- Floyd County Memorial Hospital CommissionCharles City, IA
- Mason City Clinic PCMason City, IA
- North Iowa Mercy ClinicsMason City, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy Dettmer among 145 otolaryngology physician records in Iowa
Timothy Dettmer, M.D. is one of 145 otolaryngology physician records with a practice address in Iowa. 72% 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, 81% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated2000 · median 2005 among the 75 with a school on file
- Record last updated2024 · 52% 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 Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in Iowa
There are 145 otolaryngology physician records in Iowa.
All 145 in Iowa → Every provider in Mason City → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Henry Diggelmann, M.D.Mason City, IA 504011467610196
- Vishram Jalukar, MDMason City, IA 504011336133818
- Daniel Lee, M.D.Mason City, IA 504011336599679
- Cori Walker, MDMason City, IA 504011972129542
- Marshall Greiman, MDClive, IA 503251376657957
- Corey Mineck, MDClive, IA 503251669586251
- Matthew Morgan, MDClive, IA 503251538273123
- Jeffrey Smit, M.D.Clive, IA 503251083874853
Common questions
What is Timothy Dettmer, M.D.'s NPI number?
Timothy Dettmer, M.D.'s National Provider Identifier (NPI) is 1275527111, issued on Sep 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Dettmer, M.D. located?
The NPPES record lists a practice address at 250 S Crescent Dr, Mason City, IA, 50401. Phone: (641) 494-5380. Providers update this record themselves, so call before visiting.
How can I verify Timothy Dettmer, M.D.'s license?
NPPES lists Iowa license number 35965, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Timothy Dettmer, M.D. prescribe under Medicare Part D?
In 2024, Timothy Dettmer, M.D. had 634 Medicare Part D claims for 261 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.