Individual provider · Type 1 NPI

Mackenzie Anne Steffen

Medical Physician Assistant · Williamsville, NY

NPI number 1699605642 Active

Practice location

295 Essjay Rd
Williamsville, NY 14221-5795

Call (716) 630-1151 Map

Fax (716) 250-5997

Mailing address

425 Essjay Rd Ste 170
Williamsville, NY 14221-8235

Other practice locations

  • 6950 S Transit Rd, Lockport, NY 14094-6333 · (716) 630-1000
  • 3900 N Buffalo St, Orchard Park, NY 14127-1842 · (716) 630-1000
  • 325 Essjay Rd, Williamsville, NY 14221-8243 · (716) 630-1000
  • 85 High St, Buffalo, NY 14203-1194 · (716) 630-1000

Specialties and licenses

TaxonomyCodeLicense
Medical Physician Assistant Primary 363AM0700X036231 (NY)

Medical Physician Assistant: Definition to come...

78 other providers at this address

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About NPI 1699605642

Mackenzie Anne Steffen's National Provider Identifier is 1699605642, issued on May 21, 2026. The primary taxonomy on file is Medical Physician Assistant (363AM0700X), and the practice location is in Williamsville, NY. The record was last updated on Sep 29, 2026.