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

William J. Kornrich MD PC

Organization Internal Medicine Physician · NPI 1801138268

William J. Kornrich MD PC is an Internal Medicine Physician in Riverhead, New York. Registered with an NPI since 2013.

In the registry since
2013
What do these letters mean?
PC — Professional corporation
A form of business registration, not a clinical qualification.

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Practice location Address checks out

887 Old Country Rd Ste A
Riverhead, NY 11901-2115
Phone: (631) 727-6122
Fax: (631) 727-2672
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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

Record details

NPI number1801138268
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official William Kornrich — President · (631) 727-6122
NPI enumeratedMarch 25, 2013
Last updated in NPPESMarch 25, 2013
Mailing address887 Old Country Rd, Suite A, Riverhead, NY 11901-2115

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