Retina Macula Institute

Primary specialty

SpecialistTaxonomy code 174400000X

License

G78240 Issued in CA

Legal business name

RETINA MACULA INSTITUTE

Practice address

4201 Torrance Blvd Ste 220
Torrance, CA 90503-4537

Phone

(310) 944-9393

Fax

(310) 318-5317

NPI assigned

Feb 19, 2007

Organization subpart

No

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

Authorized official

Name

Steven Madreperla, MD, PHD

Title

President

Phone

(908) 458-8333

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in CA

Enrollment records 1

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

Locations

Practitioners 6

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Masumi George Asahi, DO

  • Ophthalmology Physician
  • Orange, CA
  • NPI 1962963769
  Medicare reassignment Care Compare group NPD
• Ron P Gallemore, MD

  • Ophthalmology Physician
  • Torrance, CA
  • NPI 1912968496
  Medicare reassignment Care Compare group NPD
• Lindsay Ann Grotting, M.D.

  • Ophthalmology Physician
  • Torrance, CA
  • NPI 1164721619
  Medicare reassignment Care Compare group NPD
• Michael C Heeg, M.D.

  • Ophthalmology Physician
  • Torrance, CA
  • NPI 1972555142
  Medicare reassignment Care Compare group NPD
• Josh O Wallsh, M.D.

  • Ophthalmology Physician
  • Torrance, CA
  • NPI 1740634567
  Medicare reassignment Care Compare group NPD
• James H. Peace II, M.D. INC

  • Retina Specialist (Ophthalmology) Physician
  • Inglewood, CA
  • NPI 1497836423
  Medicare reassignment NPD

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

{
    "created_epoch": "1171843200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1778112000000",
    "number": "1487798773",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "420 MOUNTAIN AVE FL 4",
            "city": "NEW PROVIDENCE",
            "state": "NJ",
            "postal_code": "079742736",
            "telephone_number": "908-458-8333"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4201 TORRANCE BLVD STE 220",
            "city": "TORRANCE",
            "state": "CA",
            "postal_code": "905034537",
            "telephone_number": "310-944-9393",
            "fax_number": "310-318-5317"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "RETINA MACULA INSTITUTE",
        "organizational_subpart": "NO",
        "enumeration_date": "2007-02-19",
        "last_updated": "2026-05-07",
        "certification_date": "2026-05-07",
        "status": "A",
        "authorized_official_last_name": "MADREPERLA",
        "authorized_official_first_name": "STEVEN",
        "authorized_official_title_or_position": "PRESIDENT",
        "authorized_official_telephone_number": "908-458-8333",
        "authorized_official_credential": "MD, PHD"
    },
    "taxonomies": [
        {
            "code": "174400000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Specialist",
            "state": "CA",
            "license": "G78240",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Nancy Jo Rettig, LMFT
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• Specialist in Torrance, CA
• Providers in Torrance, CA by specialty
• Specialist in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 7, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.