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

Dr. John W. Marohn, OD

Individual provider Optometrist · NPI 1548265879

Dr. John W. Marohn, OD is registered under Optometry in Saint Joseph, Michigan. Graduated from Ferris State College - College of Optometry in 1991, 35 years ago. Works from 2 locations. Licensed in Michigan.

Years since qualifying
35
Trained at
Ferris State College - College of Optometry
Licensed in
MI
In the registry since
2005
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

2848 Niles Rd
Saint Joseph, MI 49085-3352
Phone: (269) 428-3300
Fax: (269) 428-5005
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 120 Longmeadow Village Dr, Niles, MI 49120-7808 — (269) 684-6400

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 4901003578 (MI)

Record details

NPI number1548265879
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorNo
NPI enumeratedJune 14, 2005
Last updated in NPPESJanuary 26, 2023
Certification dateJanuary 26, 2023

Medicare enrollment

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

Medicare specialtyOPTOMETRY
Medical schoolFERRIS STATE COLLEGE - COLLEGE OF OPTOMETRY
Graduated 1991 (35 years in practice)
Accepts Medicare assignment Not indicated

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 patients645
Services billed 1,181 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.

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