William Grinstead, MD, FACC
NPI 1306859533 · Cardiovascular Disease Physician · Houston, TX
William Grinstead, MD, FACC is a Cardiovascular Disease Physician provider in Houston, TX (NPI 1306859533).
Provider details
- NPI number
- 1306859533
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, FACC
- Sex
- Male
- Sole proprietor
- No
- License
- H2418 (TX)
Specialties & taxonomies
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
20 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
- 2006-08-15
- Last updated
- 2012-02-06
Frequently asked questions
- What is William Grinstead's NPI number?
- William Grinstead's National Provider Identifier (NPI) is 1306859533, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Grinstead's specialty?
- William Grinstead is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Grinstead located?
- William Grinstead's practice location on file with NPPES is 7737 Southwest Fwy, Houston, TX 77074-1807.
- What is William Grinstead's phone number?
- The practice phone number listed in the NPPES registry for William Grinstead is (713) 988-9512.
- Is William Grinstead's NPI active?
- Yes — William Grinstead's NPI (1306859533) is active in the NPPES registry as of the last update on 2012-02-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.