Dr. Benjamin John Ernst, M.D.
Dr. Benjamin John Ernst is a Retina Specialist (Ophthalmology) Physician provider (Ophthalmology) practicing in Appleton, WI, registered in the NPPES registry with NPI 1518162247 since 2007. The credential MD stands for Doctor of Medicine. Practices at Northeast Wisconsin Retina Associates Sc (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1518162247 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Benjamin John Ernst |
| Credential | M.D. |
| Sex | Male |
| Practice address | 442 N WESTHILL BLVD STE A, Appleton, WI, 54914 |
| Phone | 9207518666 |
| Enumeration date | 2007-06-21 |
| Last updated in NPPES | 2023-09-21 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207W00000X | Ophthalmology Physician | Secondary | 48790 | CO |
| 207WX0107X | Retina Specialist (Ophthalmology) Physician | Primary | 57459020 | WI |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Copy-ready billing details
Provider: Benjamin Ernst, M.D. NPI: 1518162247 Taxonomy: 207WX0107X (Retina Specialist (Ophthalmology) Physician) Address: 442 N WESTHILL BLVD STE A, Appleton, WI, 54914
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1437164175 | Northeast Wisconsin Retina Associates Sc | Organization | Retina Specialist (Ophthalmology) Physician | Appleton, WI |
| 1811253289 | Michael Possin | Individual | Retina Specialist (Ophthalmology) Physician | Appleton, WI |
| 1043690233 | Anthony Parendo | Individual | Retina Specialist (Ophthalmology) Physician | Appleton, WI |
Verify this record
Cross-check NPI 1518162247 against the authoritative CMS record: view Dr. Benjamin John Ernst on the official NPPES registry .
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 or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2023-09-21.