Calvin L. Day, Jr., M.D., P.A.
NPI 1861487167 · Dermatology Physician · San Antonio, TX
Calvin L. Day, Jr., M.D., P.A. is a Dermatology Physician organization in San Antonio, TX (NPI 1861487167).
Provider details
- NPI number
- 1861487167
- Entity type
- Organization
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Calvin Day, President(210) 615-8345
- License
- G1883 (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
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
- 2005-09-13
- Last updated
- 2008-02-19
Frequently asked questions
- What is Calvin L. Day, Jr., M.D., P.A.'s NPI number?
- Calvin L. Day, Jr., M.D., P.A.'s National Provider Identifier (NPI) is 1861487167, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Calvin L. Day, Jr., M.D., P.A.?
- Calvin L. Day, Jr., M.D., P.A. is classified in the NPPES registry as Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Calvin L. Day, Jr., M.D., P.A. located?
- Calvin L. Day, Jr., M.D., P.A.'s practice location on file with NPPES is 7711 Louis Pasteur Dr Suite 104, San Antonio, TX 78229-3411.
- What is Calvin L. Day, Jr., M.D., P.A.'s phone number?
- The practice phone number listed in the NPPES registry for Calvin L. Day, Jr., M.D., P.A. is (210) 615-8345.
- Who is the authorized official for Calvin L. Day, Jr., M.D., P.A.?
- The authorized official listed on Calvin L. Day, Jr., M.D., P.A.'s NPPES record is Calvin Day, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Calvin L. Day, Jr., M.D., P.A.'s NPI active?
- Yes — Calvin L. Day, Jr., M.D., P.A.'s NPI (1861487167) is active in the NPPES registry as of the last update on 2008-02-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.