Gustavo H Day MD PA
NPI 1659559664 · Internal Medicine Physician · Dallas, TX
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gustavo H Day MD PA is a Internal Medicine Physician organization in Dallas, TX (NPI 1659559664).
Provider details
- NPI number
- 1659559664
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Gustavo Day, Owner(972) 566-6764
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
- 2008-02-01
- Last updated
- 2026-05-18
- Certified
- 2026-05-18
Frequently asked questions
- What is Gustavo H Day MD PA's NPI number?
- Gustavo H Day MD PA's National Provider Identifier (NPI) is 1659559664, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Gustavo H Day MD PA?
- Gustavo H Day MD PA is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gustavo H Day MD PA located?
- Gustavo H Day MD PA's practice location on file with NPPES is 7777 Forest Ln, Dallas, TX 75230-2505.
- What is Gustavo H Day MD PA's phone number?
- The practice phone number listed in the NPPES registry for Gustavo H Day MD PA is (972) 566-6764.
- Does Gustavo H Day MD PA accept Medicare?
- Gustavo H Day MD PA is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Gustavo H Day MD PA?
- The authorized official listed on Gustavo H Day MD PA's NPPES record is Gustavo Day, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Gustavo H Day MD PA's NPI active?
- Yes — Gustavo H Day MD PA's NPI (1659559664) is active in the NPPES registry as of the last update on 2026-05-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.