Brian Joseph McGuinness, M.D.

Primary specialty

Colon & Rectal Surgery PhysicianTaxonomy code 208C00000X

License

A83195 Issued in CA

Practice address

365 Lennon LN
Ste. 290
Walnut Creek, CA 94598-5910

Phone

(925) 274-9000

Fax

(925) 274-9004

NPI assigned

Oct 26, 2006

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

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

Colorectal Surgery (Proctology)Also: Critical Care (Intensivists)

Education

Tulane University School of Medicine, 1995

Medicare assignment

May accept Medicare assignment

Telehealth

Offers telehealth services

Group practices

Bass Medical GroupGroup PAC ID 9032111281, 292 clinicians

John Muir Trauma Physicians Billing ServiceGroup PAC ID 3476542515, 111 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• John Muir Medical Center - Walnut Creek Campus Hospital, Walnut Creek, CA, CCN 050180
• John Muir Medical Center - Concord Campus Hospital, Concord, CA, CCN 050496
• Sutter Delta Medical Center Hospital, Antioch, CA, CCN 050523

Merit-based Incentive Payment System (MIPS)

Final score

83.63 of 100Reported as group

Quality

67.56

Improvement activities

40

Cost

71.56

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• Direct secure messaging: bmcguinness11243@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 and National Provider Directory roles.

• Bass Medical Group

  • Obstetrics & Gynecology Physician
  • Walnut Creek, CA
  • NPI 1174253405
  Medicare reassignment Care Compare group NPD
• John Muir Trauma Physicians Billing Service

  • Hospitalist Physician
  • Walnut Creek, CA
  • NPI 1093864837
  Medicare reassignment Care Compare group NPD
• Bass Medical Group

  • Orthopaedic Surgery Physician
  • Castro Valley, CA
  • NPI 1093181646
  NPD
• Bass Medical Group

  • Orthopaedic Surgery Physician
  • San Ramon, CA
  • NPI 1467329904
  NPD
• John Muir Trauma Physicians Billing Service

  • Trauma Surgery Physician
  • Walnut Creek, CA
  • NPI 1962551861
  NPD
• Bass Medical Group

  • Specialist
  • Walnut Creek, CA
  • NPI 1154401941
  NPD (past)
• Bass Medical Group

  • Pain Medicine Physician
  • Visalia, CA
  • NPI 1326409343
  NPD (past)
• John Muir Health

  • Rehabilitation Hospital Unit
  • Walnut Creek, CA
  • NPI 1447269303
  NPD (past)
• John Muir Health

  • General Acute Care Hospital
  • Concord, CA
  • NPI 1801821376
  NPD (past)

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

• John Muir Health

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

  • General Acute Care Hospital
  • Concord, CA
  • NPI 1801821376
  Care Compare affiliation
• Sutter Bay Hospitals

  • General Acute Care Hospital
  • Antioch, CA
  • NPI 1467808659
  Care Compare affiliation

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

{
    "created_epoch": "1161820800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1740528000000",
    "number": "1891870770",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "365 LENNON LN",
            "address_2": "STE. 290",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945985910",
            "telephone_number": "925-274-9000",
            "fax_number": "925-274-9004"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "365 LENNON LN",
            "address_2": "STE. 290",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945985910",
            "telephone_number": "925-274-9000",
            "fax_number": "925-274-9004"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MCGUINNESS",
        "first_name": "BRIAN",
        "middle_name": "JOSEPH",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-10-26",
        "last_updated": "2025-02-26",
        "certification_date": "2025-02-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208C00000X",
            "taxonomy_group": "",
            "desc": "Colon & Rectal Surgery",
            "state": "CA",
            "license": "A83195",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Brianna M McGookin, BCBA
• Hannah McGoon, R.D.
• Melissa Anne McGovern
• Olivia McGraw-Beasley
• Anna McGrew
• Grace McGuinness, NP
• Molly McGuire
• Chase McGunn
• Craig Steven McIntire-Mann, MS CCC-SLP
• Romi McIntire-Mann, PSY.D.

• Colon & Rectal Surgery Physician in Walnut Creek, CA
• Providers in Walnut Creek, CA by specialty
• Colon & Rectal Surgery Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 26, 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.
• 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.