Dennis David Knowles, O.D.
Optometrist · Chillicothe, OH
Dennis David Knowles, O.D. is an optometrist with a practice address in Chillicothe, Ohio, and NPI 1104899061, issued on Feb 10, 2006. Check the license (Ohio 3074, as entered in NPPES) with the Ohio board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Dennis David Knowles
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 3074 OH
Self-reported in NPPES; status is on the state search - Practice location
- 921 E Main St, Chillicothe, OH 45601
- Phone
- (740) 772-2100
- Enumerated
- Feb 10, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (740) 772-2100
- Medicaid ID
- 0229005 OH
- Entity
- Type 1 · individual
8 nearest optometrist records → All 2,443 in Ohio → Look up another NPI →
Verify Dennis David Knowles in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Ohio board licenses this profession
Search for license 3074Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Dennis David Knowles among 2,443 optometrist records in Ohio
Dennis David Knowles, O.D. is one of 2,443 optometrist records with a practice address in Ohio. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 54% newer
- In a Medicare fileNo · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 60% of these records are
- Record last updated2007 · 70% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
40 optometrist records list a practice address in Chillicothe
They are 40 of the 2,938 NPPES records with a practice address in Chillicothe, and 2,443 optometrist records in Ohio. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,443 in Ohio → Every provider in Chillicothe → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Nicole Abrashoff, O.D.Chillicothe, OH 456011588772933
- David Brown, O.D.Chillicothe, OH 456011396719720
- Michael Chester, O.D.Chillicothe, OH 456011780686774
- Cynthia Colby-Axe, O.D.Chillicothe, OH 456011831290626
- Cindy Elrich, O.D.Chillicothe, OH 456011407824857
- Patricia Haller, O.D.Chillicothe, OH 456011417946740
- Jeffrey Martin, OSChillicothe, OH 456011447238183
- Kelli Mulhern, O.D.Chillicothe, OH 456011659369809
Common questions
What is Dennis David Knowles, O.D.'s NPI number?
Dennis David Knowles, O.D.'s National Provider Identifier (NPI) is 1104899061, issued on Feb 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Dennis David Knowles, O.D. located?
The NPPES record lists a practice address at 921 E Main St, Chillicothe, OH, 45601. Phone: (740) 772-2100. Providers update this record themselves, so call before visiting.
How can I verify Dennis David Knowles, O.D.'s license?
NPPES lists Ohio license number 3074, as entered by the provider. Search the Ohio board that licenses this profession; the NPPES record confirms identity 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. 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.