Kimberly Nicole Grelli, MD

Primary specialty

Neonatal-Perinatal Medicine PhysicianTaxonomy code 2080N0001X

License

A147133 Issued in CA

Practice address

1601 Ygnacio Valley Rd
Walnut Creek, CA 94598-3122

Phone

(925) 947-5350

Fax

(925) 947-5350

NPI assigned

Mar 25, 2014

Last updated

Oct 31, 2025By the provider in NPPES

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: kgrelli551958@hisp.ehr.sutterhealth.org

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.

• LPCH Medical Group Div of Lucile

  dba Lucile Salter Packard Children's Hospital at Stanford

  • Children's Hospital
  • Palo Alto, CA
  • NPI 1417907940

  Pediatrics

  Medicare reassignment NPD
• Permanente Medical Group Inc

  • Internal Medicine Physician
  • Santa Clara, CA
  • NPI 1073606299

  Pediatrics

  Medicare reassignment NPD
• Permanente Medical Group Inc

  • Internal Medicine Physician
  • Redwood City, CA
  • NPI 1639252604

  Pediatrics

  NPD
• Permanente Medical Group, Inc

  • Clinical Medical Laboratory
  • San Jose, CA
  • NPI 1497971584
  NPD

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

{
    "created_epoch": "1395705600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1761868800000",
    "number": "1255758512",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1601 YGNACIO VALLEY RD",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945983122",
            "telephone_number": "925-947-5350"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1601 YGNACIO VALLEY RD",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945983122",
            "telephone_number": "925-947-5350",
            "fax_number": "925-947-5350"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "PO Box 734",
            "address_purpose": "LOCATION",
            "city": "San Francisco",
            "state": "CA",
            "postal_code": "941040734",
            "country_code": "US",
            "telephone_number": "415-502-8231",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "725 Welch Rd",
            "address_purpose": "LOCATION",
            "city": "Palo Alto",
            "state": "CA",
            "postal_code": "943041601",
            "country_code": "US",
            "telephone_number": "650-497-8000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GRELLI",
        "first_name": "KIMBERLY",
        "middle_name": "NICOLE",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2014-03-25",
        "last_updated": "2025-10-31",
        "certification_date": "2025-10-31",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "CA",
            "license": "A147133",
            "primary": false
        },
        {
            "code": "2080N0001X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Neonatal-Perinatal Medicine",
            "state": "CA",
            "license": "A147133",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Shelby Ann Gregg
• Aileen I. Gregorio, PHARM.D.
• Maria Gregory
• Cynthia Robin Greif-Neill, LMFT
• William M. Greif, MD
• Raveen Grewal
• Grey Pine Holdings, LLC (Shadelands Post Acute)
• Kathryn A. Grice, MD
• Brittany Griffin, M.A.
• Alexis Griffith, DC

• Neonatal-Perinatal Medicine Physician in Walnut Creek, CA
• Providers in Walnut Creek, 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 Oct 31, 2025; 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.