Darren Rennaker, D.D.S
Dentist · Boulder, CO
Darren Rennaker, D.D.S is a dentist with a practice address in Boulder, Colorado, and NPI 1235362864, issued on Aug 31, 2009. Check the license (Colorado 9727, as entered in NPPES) with the Colorado board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Darren Rennaker
- Credential
- D.D.S
- Primary taxonomy
- Dentist 122300000X
- License number
- 9727 CO
Self-reported in NPPES; status is on the state search - Practice location
- 4300 Arapahoe Ave, Boulder, CO 80303
- Phone
- (303) 444-2129
- Enumerated
- Aug 31, 2009
- Record last updated
- Aug 31, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (303) 413-8145
- Entity
- Type 1 · individual
8 nearest dentist records → All 2,020 in Colorado → Look up another NPI →
Verify Darren Rennaker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Colorado board licenses this profession
Search for license 9727Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.3 times the Medicare Part D claims of the average dentist in 2024
197 Medicare Part D claims for 105 beneficiaries, against an average of 86 among the 51,021 providers of this specialty who prescribed in Part D. 26 claims were for opioids.
Most prescribed
- Amoxicillin64 claims
- Ibuprofen45 claims
- Azithromycin20 claims
- Hydrocodone-Acetaminophen19 claims
- Chlorhexidine Gluconate17 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.
Darren Rennaker among 2,020 dentist records in Colorado
Darren Rennaker, D.D.S is one of 2,020 dentist records with a practice address in Colorado. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 40% of them.
- NPI issued2009 · 40% of these records are older, 57% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2009 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 122300000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dentist providers in Colorado
There are 2,020 dentist records in Colorado.
All 2,020 in Colorado → Every provider in Boulder → Dentist nationwide →
The 8 dentist records with the nearest ZIP codes
- Brett Broda, DDSBoulder, CO 803031841605615
- Mark Cannon, D.M.D.Boulder, CO 803031083813810
- Paul D'Amore, DDSBoulder, CO 803031437484623
- Rupanshi GargBoulder, CO 803031639827959
- Jessica GongBoulder, CO 803031285257279
- Ted Kawulok, D.D.S.Boulder, CO 803031245223593
- John MontoyaBoulder, CO 803031942458328
- Dominique RiveraBoulder, CO 803031710730288
Common questions
What is Darren Rennaker, D.D.S's NPI number?
Darren Rennaker, D.D.S's National Provider Identifier (NPI) is 1235362864, issued on Aug 31, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Darren Rennaker, D.D.S located?
The NPPES record lists a practice address at 4300 Arapahoe Ave, Boulder, CO, 80303. Phone: (303) 444-2129. Providers update this record themselves, so call before visiting.
How can I verify Darren Rennaker, D.D.S's license?
NPPES lists Colorado license number 9727, as entered by the provider. Search the Colorado board that licenses this profession; the NPPES record confirms identity only.
How much does Darren Rennaker, D.D.S prescribe under Medicare Part D?
In 2024, Darren Rennaker, D.D.S had 197 Medicare Part D claims for 105 beneficiaries; the average among dentist prescribers was 86. 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.