Alicia M Grefenson, PSYD, LP

Primary specialty

Clinical PsychologistTaxonomy code 103TC0700X

License

31315 Issued in CA

Practice address

2970 Camino Diablo Ste 300
Walnut Creek, CA 94597-4001

Phone

(925) 282-1778

NPI assigned

Aug 29, 2007

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Eligible to order & refer

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

Green means eligible to order or refer.

Opted out of Medicare

Yes, effective Nov 22, 2021 through Nov 22, 2027

Medicare enrollment (NPD)

Not enrolled

State licenses

Practice roles

Interoperability endpoints

• Direct secure messaging: lifestancehealth.aliciagrefenson@148377.advancedmd-direct.com

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

• Pacific Forensic Psychology Associates

  • Community/Behavioral Health Agency
  • San Francisco, CA
  • NPI 1518146695
  NPD (past)

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

{
    "created_epoch": "1188345600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1752451200000",
    "number": "1073707451",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2970 CAMINO DIABLO STE 300",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945974001",
            "telephone_number": "925-282-1778"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2970 CAMINO DIABLO STE 300",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945974001",
            "telephone_number": "925-282-1778"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GREFENSON",
        "first_name": "ALICIA",
        "middle_name": "M",
        "name_prefix": "Dr.",
        "credential": "PSYD, LP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-08-29",
        "last_updated": "2025-07-14",
        "certification_date": "2025-07-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TC0700X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical",
            "state": "CA",
            "license": "31315",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Zacharia David Greenlee, PA-C
• Kenneth Greenwell
• Laura Michelle Greenwood, DO
• Deborah A Greer, M.D.
• Tatiana Greer
• Kenneth D Gregg, LCSW
• Shelby Ann Gregg
• Aileen I. Gregorio, PHARM.D.
• Maria Gregory
• Cynthia Robin Greif-Neill, LMFT

• Clinical Psychologist in Walnut Creek, CA
• Providers in Walnut Creek, CA by specialty
• Clinical Psychologist in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 14, 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; Opt Out Affidavits.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.