Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Louis William Irmisch III, MD

Individual provider Internal Medicine Physician · NPI 1467417220

Dr. Louis William Irmisch III, MD is an Internal Medicine in Williamsville, New York. Qualified in 1979, 47 years ago. Accepts Medicare assignment. Licensed in Florida and New York.

Years since qualifying
47
Licensed in
FL, NY
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

11 W Spring St
Williamsville, NY 14221-5438
Phone: (716) 565-3605
Fax: (716) 565-3609
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 149546 (NY)
Internal Medicine Physician Taxonomy 207R00000X · Licence 88575 (FL)

Record details

NPI number1467417220
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 17, 2006
Last updated in NPPESJuly 9, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1979 (47 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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