Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. John Mark Deboer, OD

Individual provider Optometrist · NPI 1770566556

Dr. John Mark Deboer, OD is registered under Optometry in Demotte, Indiana. Graduated from Illinois College of Optometry at Chicago in 1990, 36 years ago. Practices with Aeg Indiana Professional PC, a 31-clinician group and accepts Medicare assignment. Licensed in Illinois and Indiana.

Years since qualifying
36
Trained at
Illinois College of Optometry at Chicago
Licensed in
IL, IN
In the registry since
2005
Specialties on file
2
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

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Practice location Address checks out

609 N Halleck St
Demotte, IN 46310-9545 Not confirmed with CMS for 16 years — call before visiting
Phone: (219) 987-3673
Fax: (219) 987-3905
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 18002449 (IN)
Optometrist Taxonomy 152W00000X · Licence 046-008335 (IL)

Record details

NPI number1770566556
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorNo
NPI enumeratedNovember 25, 2005
Last updated in NPPESSeptember 2, 2010

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPTOMETRY
Medical schoolILLINOIS COLLEGE OF OPTOMETRY AT CHICAGO
Graduated 1990 (36 years in practice)
Group practice Aeg Indiana Professional Pc — 31 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Cataract surgery 117 times · 77th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients596
Services billed 949 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Aeg Indiana Professional PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 31 clinicians in the practice; 12 are shown here.

Other providers in Demotte