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John Gallagher, MD
NPI 1598772535 · Internal Medicine Physician · Houston, TX
John Gallagher, MD is a Internal Medicine Physician provider in Houston, TX (NPI 1598772535).
Provider details
- NPI number
- 1598772535
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- D0383 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
2 Chelsea Blvd
Houston, TX 77006-6202
Phone: (713) 523-6627
Fax: (713) 523-7623
Street-level locationGet directions
Mailing address
2 Chelsea Blvd
Houston, TX 77006-6202
Registry dates
- Enumerated
- 2006-08-02
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Gallagher's NPI number?
- John Gallagher's National Provider Identifier (NPI) is 1598772535, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Gallagher's specialty?
- John Gallagher is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Gallagher located?
- John Gallagher's practice location on file with NPPES is 2 Chelsea Blvd, Houston, TX 77006-6202.
- What is John Gallagher's phone number?
- The practice phone number listed in the NPPES registry for John Gallagher is (713) 523-6627.
- Is John Gallagher's NPI active?
- Yes — John Gallagher's NPI (1598772535) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.