Stephen Mac, M.D.
NPI 1912138819 · Pediatric Emergency Medicine (Pediatrics) Physician · Houston, TX
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Mac, M.D. is a Pediatric Emergency Medicine (Pediatrics) Physician provider in Houston, TX (NPI 1912138819).
Provider details
- NPI number
- 1912138819
- Entity type
- Individual
- Primary specialty
- Pediatric Emergency Medicine (Pediatrics) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- C192895 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
5 documented practice locations
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
Mailing address
Additional practice locations (4)
- 25500 Medical Center DrMurrieta, CA 92562-5965Phone: (951) 696-6000
- 3020 Childrens WaySan Diego, CA 92123-4223Phone: (858) 966-8800
- 200 Henry Clay AveNew Orleans, LA 70118-5720Phone: (504) 899-9511
- 4015 22nd PlLubbock, TX 79410-1119Phone: (806) 725-0030Fax: (806) 723-6532
Registry dates
- Enumerated
- 2009-07-27
- Last updated
- 2024-07-16
- Certified
- 2024-07-16
Frequently asked questions
- What is Stephen Mac's NPI number?
- Stephen Mac's National Provider Identifier (NPI) is 1912138819, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Mac's specialty?
- Stephen Mac is listed in the NPPES registry with a primary specialty of Pediatric Emergency Medicine (Pediatrics) Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Mac located?
- Stephen Mac's practice location on file with NPPES is 18200 Katy Fwy, Houston, TX 77094-1285.
- What is Stephen Mac's phone number?
- The practice phone number listed in the NPPES registry for Stephen Mac is (936) 267-5000.
- Does Stephen Mac accept Medicare?
- Stephen Mac is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Mac's NPI active?
- Yes — Stephen Mac's NPI (1912138819) is active in the NPPES registry as of the last update on 2024-07-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.