Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Christopher Michael Jermak, MD

Ophthalmology Physician in Williamsville, NY · enumerated 2007 · practices at Williamsville Gastroenterology Associates P.C..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1619170354

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Registry record

Entity type Individual (Type 1)

Name Dr. Christopher Michael Jermak

Credential MD

Sex Male

Practice address Williamsville, NY, 14221

Phone (716) 632-1595

Fax (716) 204-4895

Enumeration date Jun 8, 2007

Last updated in NPPES Dec 8, 2010

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 244389 (NY) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
02893378	Medicaid	NY	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Christopher Jermak?

The National Provider Identifier (NPI) for Christopher Jermak is 1619170354, a Type 1 (individual) record in the CMS NPPES registry.

Where does Christopher Jermak practice?

The practice location on file with NPPES is in Williamsville, NY. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Mehdi Khan Ophthalmology Physician · Williamsville, NY NPI 1679569214 Williamsville Gastroenterology Associates P.C. Specialist · Williamsville, NY NPI 1356398176 Ramakrishna Ratnakaram Ophthalmology Physician · Williamsville, NY NPI 1780624577 Faruk Koreishi Ophthalmology Physician · Williamsville, NY NPI 1689745465 Paul Lee Ophthalmology Physician · Williamsville, NY NPI 1568536043

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-12-08.