Erin Elizabeth Brennan, CRNP-PMH

Primary specialty

Psychiatric/Mental Health Nurse PractitionerTaxonomy code 363LP0808X

License

R195146 Issued in MD

Practice address

306 W Redwood St Ste 201
Baltimore, MD 21201-1708

Phone

(443) 806-8858

Fax

(800) 794-7922

NPI assigned

Oct 4, 2021

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

Medicare enrollment (NPD)

Not enrolled

State licenses

Practice roles

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.

• Cathryne L. Maciolek, Psy.D., LLC

  • Clinical Psychologist
  • Baltimore, MD
  • NPI 1053703298
  NPD (past)
• Clear Sky Therapy Services, LLC

  • Clinical Psychologist
  • Towson, MD
  • NPI 1003125378
  NPD (past)

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

{
    "created_epoch": "1633305600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1778716800000",
    "number": "1710659131",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "306 W REDWOOD ST STE 201",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212011708",
            "telephone_number": "443-806-8858",
            "fax_number": "800-794-7922"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "306 W REDWOOD ST STE 201",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212011708",
            "telephone_number": "443-806-8858",
            "fax_number": "800-794-7922"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BRENNAN",
        "first_name": "ERIN",
        "middle_name": "ELIZABETH",
        "name_prefix": "Mrs.",
        "credential": "CRNP-PMH",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2021-10-04",
        "last_updated": "2026-05-14",
        "certification_date": "2026-05-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LP0808X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Psychiatric/Mental Health",
            "state": "MD",
            "license": "R195146",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kelly M Brenan Rothschild, M.D.
• Brendel Plonka RDN, LLC
• Brianna Lael Eanani Brennan, CNS
• Daniel C Brennan, MD
• Emily Brennan, RN
• James Charles Brennan Jr., PA-C
• Komila Dadakhodjaeva Brennan, PHD
• Luke Brennan, PH.D.
• Margaret Mary Brennan, M.D.
• Nancyellen Brennan, C.R.N.P.

• Psychiatric/Mental Health Nurse Practitioner in Baltimore, MD
• Providers in Baltimore, MD by specialty
• Psychiatric/Mental Health Nurse Practitioner in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 14, 2026; 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.