Individual provider Active NPI

George John Lach Jr., O.D.

  • Optometrist
  • Mankato, MN
National Provider Identifier
1609826577
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
OptometristTaxonomy code 152W00000X
License
2758 Issued in MN
Practice address
220 E Main St
Mankato, MN 56001-3574
Phone
(507) 345-5087
NPI assigned
May 11, 2006
Last updated
Jul 13, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 13, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Optometrist 152W00000X 2758 MN Primary

Addresses

Primary practice location

220 E Main St
Mankato, MN 56001-3574

Mailing address

1722 Candi LN
North Mankato, MN 56003-2001
Phone (507) 388-7902

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MN
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: No
  • Hospice: Yes
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20110124001268 MN Practitioner - Optometry 6002713567 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Optometry
Education
Pacific University - College of Optometry, 1999
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

120 N Broad St
Mankato, MN 56001-3518
Phone (507) 345-5087

Procedures performed for Medicare patients

ProcedureNumber of procedures
Cataract surgery24

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled

State licenses

LicenseStateTypeSpecialty
2758MNMDEmergency Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Carlson Tillisch Eye Clinic, LTD Optometrist CurrentSince Apr 3, 2024 Accepting new patients
Carlson Tillisch Eye Clinic, LTD Optometrist CurrentSince Apr 3, 2024 Accepting new patients

Locations

120 N Broad St
Mankato, MN 56001
Phone (507) 345-5087

220 E Main St
Mankato, MN 56001
Phone (507) 345-5087

26 N Broadway St
New Ulm, MN 56073
Phone (507) 354-7407

Interoperability endpoints

  • Direct secure messaging: g.john.lach@direct.revolutionehr.com

Organizations & group practices 2

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1147305600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1609826577",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1722 CANDI LN",
            "city": "NORTH MANKATO",
            "state": "MN",
            "postal_code": "560032001",
            "telephone_number": "507-388-7902"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "220 E MAIN ST",
            "city": "MANKATO",
            "state": "MN",
            "postal_code": "560013574",
            "telephone_number": "507-345-5087"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LACH",
        "first_name": "GEORGE",
        "middle_name": "JOHN",
        "name_prefix": "Dr.",
        "name_suffix": "Jr.",
        "credential": "O.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-11",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "152W00000X",
            "taxonomy_group": "",
            "desc": "Optometrist",
            "state": "MN",
            "license": "2758",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Mankato, MN

Sources for this page

Verify at the official NPI Registry.