Brennan Medical Group

Primary specialty

Pulmonary Disease PhysicianTaxonomy code 207RP1001X

Legal business name

BRENNAN MEDICAL GROUP

Practice address

30 Brennan St
Watsonville, CA 95076-4303

Phone

(831) 768-0220

Fax

(831) 722-1702

NPI assigned

Aug 5, 2006

Organization subpart

No

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

Authorized official

Name

Dr. Mark Gerard Byrne, M.D.

Title

Owner/Physician

Phone

(831) 768-0220

Specialties & licenses 4

Addresses

Other identifiers 1

Locations

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

{
    "created_epoch": "1154736000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1757548800000",
    "number": "1962411264",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "30 BRENNAN ST",
            "city": "WATSONVILLE",
            "state": "CA",
            "postal_code": "950764303",
            "telephone_number": "831-768-0220",
            "fax_number": "831-722-1702"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "30 BRENNAN ST",
            "city": "WATSONVILLE",
            "state": "CA",
            "postal_code": "950764303",
            "telephone_number": "831-768-0220",
            "fax_number": "831-722-1702"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "BRENNAN MEDICAL GROUP",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-08-05",
        "last_updated": "2025-09-11",
        "status": "A",
        "authorized_official_last_name": "BYRNE",
        "authorized_official_first_name": "MARK",
        "authorized_official_middle_name": "GERARD",
        "authorized_official_title_or_position": "OWNER/PHYSICIAN",
        "authorized_official_telephone_number": "831-768-0220",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "M.D."
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Family Medicine",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207RI0011X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Interventional Cardiology",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207RP1001X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Pulmonary Disease",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00G743880",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Ana Guadalupe Borrayo Garcia
• Nicholas Paul Boswell, DPT, PT
• Brendt D. Carlson, MD Inc Dba Mar Monte Medical Clinic
• Mark Ian Brenis, DPM
• Brennan Medical Corporation
• Jonathan P Briggs
• Pamela Ann Brown, CHIROPRACTOR DC
• Cari Browning, ASW
• Monique Browns Peterson, M.D.
• Nancy Broxton, MA, LMFT

• Pulmonary Disease Physician in Watsonville, CA
• Providers in Watsonville, CA by specialty
• Pulmonary Disease Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.