Westwater Diagnostics PLLC

Primary specialty

Clinical Medical LaboratoryTaxonomy code 291U00000X

Legal business name

WESTWATER DIAGNOSTICS PLLC

Practice address

407 E 25TH St
Houston, TX 77008-2305

Phone

(713) 559-6929

NPI assigned

May 9, 2023

Organization subpart

Yes

Parent organization

WESTWATER DIAGNOSTICS PLLCAs reported in NPPES

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

Authorized official

Name

Mhair Dekmezian, MD

Title

Authorizing Official

Phone

(713) 559-6929

Specialties & licenses 1

Addresses

Other names 1

• WESTWATER DIAGNOSTICS LLC Former legal business name

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

Tax ID family

Westwater Diagnostics LLC2 organizations share this tax ID, including this one

Part of

Westwater Diagnostics LLC

Other organizations with this tax ID 1

Organizations that report the same tax identification number in the National Provider Directory.

• Westwater Diagnostics PLLC

  • Anatomic Pathology & Clinical Pathology Physician
  • Houston, TX
  • NPI 1003413139
  NPD tax ID

Parent organization (reported in NPPES) 1

This organization reports itself as a subpart in NPPES; the parent’s legal name matches this organization in the same state.

• Westwater Diagnostics PLLC

  • Anatomic Pathology & Clinical Pathology Physician
  • Houston, TX
  • NPI 1003413139
  NPPES parent name

Practitioners 1

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

• Roupen Dekmezian, M.D.

  • Anatomic Pathology & Clinical Pathology Physician
  • Houston, TX
  • NPI 1285638668
  NPD

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

{
    "created_epoch": "1683590400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1770595200000",
    "number": "1417647819",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "407 E 25TH ST",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770082305",
            "telephone_number": "713-559-6929"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "407 E 25TH ST",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770082305",
            "telephone_number": "713-559-6929"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "WESTWATER DIAGNOSTICS PLLC",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "WESTWATER DIAGNOSTICS PLLC",
        "enumeration_date": "2023-05-09",
        "last_updated": "2026-02-09",
        "certification_date": "2026-02-09",
        "status": "A",
        "authorized_official_last_name": "DEKMEZIAN",
        "authorized_official_first_name": "MHAIR",
        "authorized_official_title_or_position": "AUTHORIZING OFFICIAL",
        "authorized_official_telephone_number": "713-559-6929",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "291U00000X",
            "taxonomy_group": "",
            "desc": "Clinical Medical Laboratory",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "WESTWATER DIAGNOSTICS LLC",
            "code": "4",
            "type": "Former Legal Business Name"
        }
    ]
}

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• Clinical Medical Laboratory in Houston, TX
• Providers in Houston, TX by specialty
• Clinical Medical Laboratory in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 9, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• 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.