OrganizationActive
Horizon Altus PLLC
NPI 1124979471 · Emergency Medicine Physician · Houston, TX
Horizon Altus PLLC is a Emergency Medicine Physician organization in Houston, TX (NPI 1124979471).
Provider details
- NPI number
- 1124979471
- Entity type
- Organization
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Darleen Callahan, Vice President, Revenue Cycle(800) 417-0740
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Established profile(54/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
1535 West Loop S Ste 300
Houston, TX 77027-0003
Phone: (800) 417-0470
Fax: (832) 219-3228
Street-level locationGet directions
Mailing address
1535 West Loop S Ste 300
Houston, TX 77027-0003
Registry dates
- Enumerated
- 2026-02-04
- Last updated
- 2026-04-17
- Certified
- 2026-04-17
Frequently asked questions
- What is Horizon Altus PLLC's NPI number?
- Horizon Altus PLLC's National Provider Identifier (NPI) is 1124979471, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Horizon Altus PLLC?
- Horizon Altus PLLC is classified in the NPPES registry as Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Horizon Altus PLLC located?
- Horizon Altus PLLC's practice location on file with NPPES is 1535 West Loop S Ste 300, Houston, TX 77027-0003.
- What is Horizon Altus PLLC's phone number?
- The practice phone number listed in the NPPES registry for Horizon Altus PLLC is (800) 417-0470.
- Who is the authorized official for Horizon Altus PLLC?
- The authorized official listed on Horizon Altus PLLC's NPPES record is Darleen Callahan, Vice President, Revenue Cycle. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Horizon Altus PLLC's NPI active?
- Yes — Horizon Altus PLLC's NPI (1124979471) is active in the NPPES registry as of the last update on 2026-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.