JOHANN SCHLAGER, OD appears in the CMS NPPES registry as a Vision Therapy Optometrist provider holding OD credentials at 3178 COLLINS DR, MERCED, CA, 95348, with a listed phone of (209) 383-1246. NPI 1255986014 was issued on 08/07/2019. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SCHLAGER most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 72 prescription claims written by this provider, covering 20 Medicare beneficiaries and totaling roughly $9K in drug spend, split 47% brand-name and 53% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Vision Therapy Optometrist is a narrow specialty nationwide, with 369 enrolled providers across 42 states and an average of 209 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.