Timothy D. Olthoff, DO
Diagnostic Radiology Physician · Prescott, AZ
Timothy D. Olthoff, DO is a diagnostic radiology physician with a practice address in Prescott, Arizona, and NPI 1225019425, issued on Nov 7, 2005. Check the license (Arizona 006190, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Timothy D. Olthoff
- Credential
- DO
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License numbers
- 006190 AZ
02002900 IN
Self-reported in NPPES; status is on the state search - Practice location
- 810 Whipple St, Prescott, AZ 86301
- Phone
- (928) 771-7577
- Enumerated
- Nov 7, 2005
- Record last updated
- Jul 21, 2022
- Fax
- (928) 458-2080
- Medicaid ID
- 200521590 IN
- Medicare enrollment
- Enrolled (PECOS I20131107001498); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 1999
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 869 in Arizona → Look up another NPI →
Verify Timothy D. Olthoff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 006190Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average diagnostic radiology physician in 2024
11 Medicare Part D claims for 11 beneficiaries, against an average of 51 among the 2,711 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Prednisone11 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.
Bills Medicare through 2 group practices
- Prescott Radiologists LLPPrescott, AZ
- Yavapai Community Hospital AssociationPrescott, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy D. Olthoff among 869 diagnostic radiology physician records in Arizona
Timothy D. Olthoff, DO is one of 869 diagnostic radiology physician records with a practice address in Arizona. 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, 84% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1999 · median 2003 among the 573 with a school on file
- Record last updated2022 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in Arizona
There are 869 diagnostic radiology physician records in Arizona.
All 869 in Arizona → Every provider in Prescott → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Ayad Agha, D.O.Prescott, AZ 863011730113903
- Sierra-Amber MabryPrescott, AZ 863011982388740
- David Lloyd, MDPrescott, AZ 863051932171618
- Ben Paxton, M.D.Prescott, AZ 863051548469372
- Karl Wickstrom, M.D.Prescott, AZ 863051669476123
- Patrick Hitchcock, MDPrescott, AZ 863131477533776
- Mary Poncel, M.D.Prescott, AZ 863131609960707
- Bernard Sakowicz, M.D.Prescott, AZ 863131235236589
Common questions
What is Timothy D. Olthoff, DO's NPI number?
Timothy D. Olthoff, DO's National Provider Identifier (NPI) is 1225019425, issued on Nov 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Timothy D. Olthoff, DO located?
The NPPES record lists a practice address at 810 Whipple St, Prescott, AZ, 86301. Phone: (928) 771-7577. Providers update this record themselves, so call before visiting.
How can I verify Timothy D. Olthoff, DO's license?
NPPES lists Arizona license number 006190, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Timothy D. Olthoff, DO prescribe under Medicare Part D?
In 2024, Timothy D. Olthoff, DO had 11 Medicare Part D claims for 11 beneficiaries; the average among diagnostic radiology physician prescribers was 51. 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.