Christopher Robert Grenzer, D.M.D.
General Practice Dentistry · Tigard, OR
Christopher Robert Grenzer, D.M.D. is a general practice dentistry with a practice address in Tigard, Oregon, and NPI 1467459164, issued on Jul 7, 2005. Check the license (Oregon 6607, as entered in NPPES) with the Oregon board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Christopher Robert Grenzer
- Credential
- D.M.D.
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- 6607 OR
Self-reported in NPPES; status is on the state search - Practice location
- 11565 SW Hall Blvd, Tigard, OR 97223
- Phone
- (503) 620-6640
- Enumerated
- Jul 7, 2005
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 1,888 in Oregon → Look up another NPI →
Also registered at 11565 SW Hall Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Christopher Robert Grenzer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oregon board licenses this profession
Search for license 6607Check 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 general practice dentistry in 2024
18 Medicare Part D claims for 13 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D.
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.
Christopher Robert Grenzer among 1,888 general practice dentistry records in Oregon
Christopher Robert Grenzer, D.M.D. is one of 1,888 general practice dentistry 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 85% newer
- In a Medicare fileYes · 60% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
46 general practice dentistry records list a practice address in Tigard
They are 46 of the 3,081 NPPES records with a practice address in Tigard, and 1,888 general practice dentistry records in Oregon.
All 1,888 in Oregon → Every provider in Tigard → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Gregory Alexander, D.D.S.Portland, OR 972231972517985
- Greg Bowers, DMDTigard, OR 972231124040183
- Roger Dimick, DMDTigard, OR 972231609955772
- Vivian Lam, D.M.DTigard, OR 972231891744553
- John McCroskey, DDSTigard, OR 972231821096058
- Thomas Orazio, DMDPortland, OR 972231356407894
- Daniel Pihlstrom, D.D.S.Tigard, OR 972231891704557
- Brian Saklofsky, DMDPortland, OR 972231790785673
Common questions
What is Christopher Robert Grenzer, D.M.D.'s NPI number?
Christopher Robert Grenzer, D.M.D.'s National Provider Identifier (NPI) is 1467459164, issued on Jul 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Christopher Robert Grenzer, D.M.D. located?
The NPPES record lists a practice address at 11565 SW Hall Blvd, Tigard, OR, 97223. Phone: (503) 620-6640. Providers update this record themselves, so call before visiting.
How can I verify Christopher Robert Grenzer, D.M.D.'s license?
NPPES lists Oregon license number 6607, as entered by the provider. Search the Oregon board that licenses this profession; the NPPES record confirms identity only.
How much does Christopher Robert Grenzer, D.M.D. prescribe under Medicare Part D?
In 2024, Christopher Robert Grenzer, D.M.D. had 18 Medicare Part D claims for 13 beneficiaries; the average among general practice dentistry prescribers was 83. 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.