Aaron James Simko, MD

Primary specialty

Neonatal-Perinatal Medicine PhysicianTaxonomy code 2080N0001X

License

G627350 Issued in CA

Practice address

525 Acacia Street
Neonatal Department
Stockton, CA 95203

Phone

(209) 944-5550

NPI assigned

Jun 6, 2006

Last updated

Jul 13, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Eligible to order & refer

• Part B services: No
• Medical equipment: Yes
• Home health: No
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

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.

• Central Valley Neonatal Medical GRP

  • Neonatal-Perinatal Medicine Physician
  • Stockton, CA
  • NPI 1922260629
  NPD (past) Authorized official
• San Joaquin Valley Neonatal Medical Assocation

  • Neonatal-Perinatal Medicine Physician
  • French Camp, CA
  • NPI 1619168952
  NPD (past)

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

{
    "created_epoch": "1149552000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1548209240",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1524 MCHENRY AVE",
            "address_2": "SUITE 150",
            "city": "MODESTO",
            "state": "CA",
            "postal_code": "95350",
            "telephone_number": "209-571-8330",
            "fax_number": "209-491-7184"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "525 ACACIA STREET",
            "address_2": "NEONATAL DEPARTMENT",
            "city": "STOCKTON",
            "state": "CA",
            "postal_code": "95203",
            "telephone_number": "209-944-5550"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SIMKO",
        "first_name": "AARON",
        "middle_name": "JAMES",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-06",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2080N0001X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Neonatal-Perinatal Medicine",
            "state": "CA",
            "license": "G627350",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00G627350",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Aris Rodriguez Silverio, PTA
• John Saunders Silverton, MD
• Amber Nicole Simarro
• Sharon Simas
• Carla Gaye Simien, LICENSED PSYCH TECH
• Deavian Simmons
• Elizabeth Ann Simmons, NP
• Juliana Simmons, PSY.D.
• Mariah Jordan Simmons
• Arneatha Simon

• Neonatal-Perinatal Medicine Physician in Stockton, CA
• Providers in Stockton, CA by specialty
• Neonatal-Perinatal Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.