Marc Simpao, MD
NPI 1427244946 · Internal Medicine Physician · Austin, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Simpao, MD is a Internal Medicine Physician provider in Austin, TX (NPI 1427244946).
Provider details
- NPI number
- 1427244946
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- M7632 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES 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
Mailing address
Registry dates
- Enumerated
- 2007-09-18
- Last updated
- 2016-12-20
Frequently asked questions
- What is Marc Simpao's NPI number?
- Marc Simpao's National Provider Identifier (NPI) is 1427244946, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Simpao's specialty?
- Marc Simpao is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Simpao located?
- Marc Simpao's practice location on file with NPPES is 1301 W 38th St, Austin, TX 78705-1011.
- What is Marc Simpao's phone number?
- The practice phone number listed in the NPPES registry for Marc Simpao is (512) 324-1864.
- Does Marc Simpao accept Medicare?
- Marc Simpao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Simpao's NPI active?
- Yes — Marc Simpao's NPI (1427244946) is active in the NPPES registry as of the last update on 2016-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.