Nancy B Mozelsio, M.D.

Primary specialty

Allergy & Immunology PhysicianTaxonomy code 207K00000X

License

A75031 Issued in CA

Practice address

370 N. Wiget Lane
Suite 210
Walnut Creek, CA 94598-2452

Phone

(925) 935-0856

Fax

(925) 364-5509

NPI assigned

Aug 30, 2005

Last updated

Oct 2, 2026By 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 1

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

Specialty

Allergy/ImmunologyAlso: Internal Medicine

Education

University of California, Irvine, California College of Medicine, 1996

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Allergy and Asthma Medical Group of the Bay Area IncGroup PAC ID 6507758224, 20 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• John Muir Medical Center - Walnut Creek Campus Hospital, Walnut Creek, CA, CCN 050180

Merit-based Incentive Payment System (MIPS)

Final score

85.95 of 100Reported as group

Quality

99.17

Promoting interoperability

98

Improvement activities

40

Cost

55.67

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• Direct secure messaging: nmozelsio16529@ehr.johnmuirhealth.com

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.

• Allergy & Asthma Medical Group of the Bay Area Inc

  dba Allergy & Asthma Medical Group of Diablo Valley Inc

  • Allergy & Immunology Physician
  • Walnut Creek, CA
  • NPI 1871550590
  Medicare reassignment Care Compare group NPD
• California Pacific Medical Group, Inc.

  dba Brown & Toland Medical Group

  • Multi-Specialty Clinic/Center
  • Oakland, CA
  • NPI 1275002453
  NPD (past)
• Hill Physicians Medical Group - PPO Program

  • Preferred Provider Organization
  • San Ramon, CA
  • NPI 1679011035
  NPD (past)
• John Muir Health

  • Rehabilitation Hospital Unit
  • Walnut Creek, CA
  • NPI 1447269303
  NPD (past)
• Marin General Hospital

  • General Acute Care Hospital
  • Greenbrae, CA
  • NPI 1396725677
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• John Muir Health

  dba John Muir Health, Walnut Creek Medical Center

  • General Acute Care Hospital
  • Walnut Creek, CA
  • NPI 1740215219
  Care Compare affiliation

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

{
    "created_epoch": "1125360000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1790899200000",
    "number": "1114910551",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "370 N. WIGET LANE",
            "address_2": "SUITE 210",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945982452",
            "telephone_number": "925-935-0856",
            "fax_number": "925-364-5509"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "370 N. WIGET LANE",
            "address_2": "SUITE 210",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945982452",
            "telephone_number": "925-935-0856",
            "fax_number": "925-364-5509"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MOZELSIO",
        "first_name": "NANCY",
        "middle_name": "B",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2005-08-30",
        "last_updated": "2026-10-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207K00000X",
            "taxonomy_group": "",
            "desc": "Allergy & Immunology",
            "state": "CA",
            "license": "A75031",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Lyndsey Ann Mountain, BSC PHYSIOTHERAPY
• Seyed Mohsen Mousavi Nasab, M.D.
• Moussa F Yazbeck MD Inc
• Teniyah Mouton
• Jason Frederick Moy, MD
• Mekenna Renee Mroskey, N.P.
• Mt Diablo Integrated Wellness Inc
• Mt Diablo Memory Center, a Psychological Corporation
• Theresa Ann Mueller, RN
• Jakala Muhammad

• Allergy & Immunology Physician in Walnut Creek, CA
• Providers in Walnut Creek, CA by specialty
• Allergy & Immunology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 2, 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.
• 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.