Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Larry D Erpenbach, O.D.
Optometrist in Billings, MT · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1801921713
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Larry D Erpenbach
Credential O.D.
Sex Male
Practice address 2475 Village Ln, Suite 202, Billings, MT, 59102
Phone (406) 252-6608
Fax (406) 252-6600
Enumeration date Feb 22, 2007
Last updated in NPPES Mar 7, 2023
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1460261 | Other | MT | MT STATE ID |
| 0482528 | Medicaid | MT | - |
| 499 | Other | MT | MT MEDICAL LICENSE |
| 27741 | Other | MT | BCBS PROVIDER NUMBER |
| 15008808 | Other | - | WORKERS COMP |
| 3321 | Other | MT | BLUE CHIP |
| CJ9407 | Other | MT | RAILROAD MEDICARE |
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.
Frequently asked questions
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.
What specialty is Larry Erpenbach?
Larry Erpenbach is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Lagreca Eye Clinic PC Ambulatory Surgical Clinic/Center · Billings, MT NPI 1609882810 Karen Kietzman Clinical Psychologist · Billings, MT NPI 1508878315 Brian Lagreca Ophthalmology Physician · Billings, MT NPI 1992840128 Kathleen Mattucci Social Worker · Billings, MT NPI 1740490853 Judith Starr Counselor · Billings, MT NPI 1427239029 Lagreca Eye Clinic, PC Ophthalmology Physician · Billings, MT NPI 1780866251 Safe Harbor Therapeutic Services LLC Clinical Social Worker · Billings, MT NPI 1205165735 Barbara Pellant Mende Mental Health Counselor · Billings, MT NPI 1770860645
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.