Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ernest William Kornmehl, MD

Ophthalmology Physician in Brookline, MA · enumerated 2005 · practices at Doctor Physical Therapy,Inc.

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

National Provider Identifier

1104816842

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Registry record

Entity type Individual (Type 1)

Name Dr. Ernest William Kornmehl

Credential MD

Sex Male

Practice address 44 Washington St, Brookline, MA, 02445

Phone (617) 232-9600

Fax (617) 232-7002

Enumeration date Oct 25, 2005

Last updated in NPPES Feb 14, 2025

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 58784 (MA) 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
058784	Other	MA	TUFTS HEALTH PLAN
3068820	Medicaid	MA	-
J09372	Other	MA	BCBS MA

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 specialty is Ernest Kornmehl?

Ernest Kornmehl is registered in NPPES with the primary taxonomy of Ophthalmology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-14.