John Mark Deboer, O.D.
Optometrist · Demotte, IN
John Mark Deboer, O.D. is an optometrist with a practice address in Demotte, Indiana, and NPI 1770566556, issued on Nov 25, 2005. Check the license (Indiana 18002449, as entered in NPPES) with the Indiana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Mark Deboer
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License numbers
- 18002449 IN
046-008335 IL
Self-reported in NPPES; status is on the state search - Practice location
- 609 N Halleck St, Demotte, IN 46310
- Phone
- (219) 987-3673
- Enumerated
- Nov 25, 2005
- Record last updated
- Sep 2, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (219) 987-3905
- Medicaid ID
- 200395230 IN
- Medicare enrollment
- Enrolled (PECOS I20120201000663); accepts Medicare assignment
- Medical or professional school
- Illinois College Of Optometry At Chicago, 1990
- Entity
- Type 1 · individual
8 nearest optometrist records → All 1,578 in Indiana → Look up another NPI →
Also registered at 609 N Halleck St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gerrit Devries, O.D.Optometrist1992729206
Verify John Mark Deboer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Indiana board licenses this profession
Search for license 18002449Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% more Medicare Part D claims than the average optometrist in 2024
475 Medicare Part D claims for 113 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Latanoprost239 claims
- Dorzolamide-Timolol53 claims
- Timolol Maleate53 claims
- Lumigan26 claims
- Tobramycin-Dexamethasone23 claims
- Doxycycline Hyclate18 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
- Aeg Indiana Professional PCDemotte, IN
- Deboer OD LtdDemotte, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Mark Deboer among 1,578 optometrist records in Indiana
John Mark Deboer, O.D. is one of 1,578 optometrist records with a practice address in Indiana. 73% 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 · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1990 · median 2008 among the 1,014 with a school on file
- Record last updated2010 · 66% 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 Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 optometrist records list a practice address in Demotte
They are 2 of the 81 NPPES records with a practice address in Demotte, and 1,578 optometrist records in Indiana.
All 1,578 in Indiana → Every provider in Demotte → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Gerrit Devries, O.D.Demotte, IN 463101992729206
- Melissa Bourland, ODDyer, IN 463111346766060
- Katrina Fesko, O.D.Dyer, IN 463111285048231
- Andrew Mansueto, O.D.Dyer, IN 463111568442275
- Khushbu Mehta, ODEast Chicago, IN 463121891380341
- Jovan Alavanja, O.D.Crown Point, IN 463071285070037
- Sheila Bogart, ODCrown Point, IN 463071902859812
- Ashley Doolin, ODCrown Point, IN 463071275971129
Common questions
What is John Mark Deboer, O.D.'s NPI number?
John Mark Deboer, O.D.'s National Provider Identifier (NPI) is 1770566556, issued on Nov 25, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Mark Deboer, O.D. located?
The NPPES record lists a practice address at 609 N Halleck St, Demotte, IN, 46310. Phone: (219) 987-3673. Providers update this record themselves, so call before visiting.
How can I verify John Mark Deboer, O.D.'s license?
NPPES lists Indiana license number 18002449, as entered by the provider. Search the Indiana board that licenses this profession; the NPPES record confirms identity only.
How much does John Mark Deboer, O.D. prescribe under Medicare Part D?
In 2024, John Mark Deboer, O.D. had 475 Medicare Part D claims for 113 beneficiaries; the average among optometrist prescribers was 277. 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.