J. Michael Brennan, M.D., P.a.

Primary specialty

Psychiatry PhysicianTaxonomy code 2084P0800X

License

J3750 Issued in TX

Legal business name

J. MICHAEL BRENNAN, M.D., P.A.

Practice address

7557 Rambler Rd Ste 565
Dallas, TX 75231-2373

Phone

(214) 824-2273

Fax

(214) 826-9340

NPI assigned

Oct 15, 2007

Organization subpart

No

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

Authorized official

Name

Ms. Sanjuanita Hatter

Title

Administrative Assistant

Phone

(214) 824-2273

Specialties & licenses 1

Addresses

Other identifiers 3

Medicare fee-for-service enrollment

Enrolled in TX

Enrollment records 1

Locations

Practitioners 5

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• John Michael Brennan, M.D, P.A.

  • Psychiatry Physician
  • Dallas, TX
  • NPI 1336123173
  Medicare reassignment
• Robert E Gregg, PH.D.

  • Clinical Psychologist
  • Dallas, TX
  • NPI 1558374264
  NPD (past)
• James Allen Shadduck, PH.D.

  • Clinical Psychologist
  • Dallas, TX
  • NPI 1679980676
  NPD (past)
• Stephen F. Vobach, M.D..

  • Psychiatry Physician
  • Dallas, TX
  • NPI 1851377006
  NPD (past)
• Lauren Marie Cimperman

  • Student in an Organized Health Care Education/Training Program
  • Kettering, OH
  • NPI 1174704555
  NPD (past)

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

{
    "created_epoch": "1192406400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1765756800000",
    "number": "1669661799",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "7557 RAMBLER RD STE 565",
            "city": "DALLAS",
            "state": "TX",
            "postal_code": "752312373",
            "telephone_number": "214-824-2273",
            "fax_number": "214-826-9340"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "7557 RAMBLER RD STE 565",
            "city": "DALLAS",
            "state": "TX",
            "postal_code": "752312373",
            "telephone_number": "214-824-2273",
            "fax_number": "214-826-9340"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "J. MICHAEL BRENNAN, M.D., P.A.",
        "organizational_subpart": "NO",
        "enumeration_date": "2007-10-15",
        "last_updated": "2025-12-15",
        "certification_date": "2025-12-15",
        "status": "A",
        "authorized_official_last_name": "HATTER",
        "authorized_official_first_name": "SANJUANITA",
        "authorized_official_title_or_position": "ADMINISTRATIVE ASSISTANT",
        "authorized_official_telephone_number": "214-824-2273",
        "authorized_official_name_prefix": "Ms."
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "TX",
            "license": "J3750",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BCBS-TX",
            "identifier": "00T03B",
            "state": "TX"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "0359267-01",
            "state": "TX"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "AETNA",
            "identifier": "4480010",
            "state": "TX"
        }
    ],
    "endpoints": [],
    "other_names": []
}

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• Psychiatry Physician in Dallas, TX
• Providers in Dallas, TX by specialty
• Psychiatry Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 15, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.