William F. Warren, DDS MS
Endodontics · Klamath Falls, OR
William F. Warren, DDS MS is an endodontics with a practice address in Klamath Falls, Oregon, and NPI 1700999729, issued on Aug 16, 2006. Check the license (Oregon D8547, as entered in NPPES) with the Oregon board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William F. Warren
- Credential
- DDS MS
- Primary taxonomy
- Endodontics 1223E0200X
- License number
- D8547 OR
Self-reported in NPPES; status is on the state search - Practice location
- 2650 Washburn WY, Klamath Falls, OR 97603
- Phone
- (541) 882-6800
- Enumerated
- Aug 16, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (541) 882-6811
- Entity
- Type 1 · individual
8 nearest endodontics records → All 113 in Oregon → Look up another NPI →
Verify William F. Warren in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oregon board licenses this profession
Search for license D8547Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average endodontics in 2024
87 Medicare Part D claims for 45 beneficiaries, against an average of 121 among the 4,119 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 31 claims were for opioids.
Most prescribed
- Amoxicillin41 claims
- Hydrocodone-Acetaminophen31 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.
William F. Warren among 113 endodontics records in Oregon
William F. Warren, DDS MS is one of 113 endodontics records with a practice address in Oregon. 60% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 18% of them.
- NPI issued2006 · 18% of these records are older, 51% newer
- In a Medicare fileYes · 60% of these records are
- In the CMS Doctors and Clinicians fileNo · 0% of these records are
- Record last updated2007 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223E0200X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endodontics providers in Oregon
There are 113 endodontics records in Oregon.
All 113 in Oregon → Every provider in Klamath Falls → Endodontics nationwide →
The 8 endodontics records with the nearest ZIP codes
- Christian Achleithner, D.M.DKlamath Falls, OR 976031437482304
- David Borota, DDSGrants Pass, OR 975271073135711
- Jeffrey Dryden, D.D.S.Grants Pass, OR 975271881786176
- Russell Reynolds, DDSAshland, OR 975201134382344
- Luke HardenBend, OR 977011568954220
- Dennis Holt, BS,DMD,MS,MSEDBend, OR 977011679898001
- Daniel Radatti, DDSBend, OR 977011477633840
- Cameron Woolsey, D.D.S, M.S.D.Bend, OR 977011528637485
Common questions
What is William F. Warren, DDS MS's NPI number?
William F. Warren, DDS MS's National Provider Identifier (NPI) is 1700999729, issued on Aug 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William F. Warren, DDS MS located?
The NPPES record lists a practice address at 2650 Washburn WY, Klamath Falls, OR, 97603. Phone: (541) 882-6800. Providers update this record themselves, so call before visiting.
How can I verify William F. Warren, DDS MS's license?
NPPES lists Oregon license number D8547, as entered by the provider. Search the Oregon board that licenses this profession; the NPPES record confirms identity only.
How much does William F. Warren, DDS MS prescribe under Medicare Part D?
In 2024, William F. Warren, DDS MS had 87 Medicare Part D claims for 45 beneficiaries; the average among endodontics prescribers was 121. 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.