ERICH MERTENSMEYER, D.O. appears in the CMS NPPES registry as a Otolaryngic Allergy Physician provider holding D.O. credentials at 1229 E SEMINOLE ST, SPRINGFIELD, MO, 65804, with a listed phone of (417) 820-5750. NPI 1396861498 was issued on 03/21/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MERTENSMEYER 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 419 prescription claims written by this provider, covering 152 Medicare beneficiaries and totaling roughly $23K in drug spend, split 6% brand-name and 94% generic by claim count, with an opioid prescribing rate of 4.5%. 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.

Otolaryngic Allergy Physician is a narrow specialty nationwide, with 151 enrolled providers across 38 states and an average of 788 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.