DIANE Z GREINER in San Antonio, TX

NPPES name and NPI

Dr. DIANE Z GREINER is in this directory because NPI 1568462885 is an individual (NPI-1) with a San Antonio, Texas LOCATION address and at least one adult cardiology taxonomy. The check date for the license crosswalk is 2026-11-09.

NPPES basic.first_name is DIANE. basic.middle_name is Z. basic.last_name is GREINER. basic.credential is M.D.. basic.name_prefix is --. basic.sex is F. basic.sole_proprietor is NO. basic.status is A.

NPPES enumeration_date is 2005-07-28. NPPES last_updated is 2012-12-28. Those dates belong to the registry row, not to a visit this site observed.

The credential or prefix string is one this directory treats as a physician-style credential (MD, DO, MBBS, or MBChB, or a Dr. prefix when the credential is blank). That is a label from NPPES, not a board certification.

Taxonomy codes on this NPI

The primary code used for the heading is 207RC0000X (Internal Medicine, Cardiovascular Disease). A person can carry more than one cardiology code. Codes are not a ranking.

Primary taxonomy 207RC0000X (Internal Medicine, Cardiovascular Disease), state TX, license string J6830.

Texas Medical Board crosswalk

Join method for this NPI: license. The crosswalk file is data/datos5/matches.json, built from NPPES license strings against Texas open data set tm3v-pfq9. Date of that file: 2026-11-09.

The crosswalk marks currently_licensed as Y. License number on the matched row: J6830. registration_status: ACTIVE. license_status: NONE.

disciplinary_status is NONE on the matched row. A value of NONE means the field was NONE in the file, not a promise about future complaints.

TMB practice_city on the matched row is DES MOINES. The street on this page is the NPPES LOCATION address in San Antonio. They are different fields and this site does not merge them into one story.

NPPES does not prove a state license. That is why the TMB field is shown next to the NPI. If the fields disagree, both are shown and neither is smoothed over.

Practice location and phone

NPPES LOCATION address_1 is 502 MADISON OAK DR. Normalized grouping key, with suite stripped: 502 MADISON OAK DR, San Antonio, TX 78258. ZIP5 is 78258. postal_code as stored is 782584084.

One San Antonio LOCATION row was stored for this NPI.

Telephone on the first San Antonio LOCATION is 210-483-8883. The call link uses that number. This site has not called it and does not know the office hours.

Fax on that LOCATION is 210-474-1740.

What this page does not show

This build does not have a CMS Medicare assignment file, so it does not say whether the clinician accepts Medicare or Medicare Advantage. It does not have a confirmed language field, office hours, hospital privileges, or a quality score.

There is no rating, no ranking, and no 'best' list. The profile is not claimed. Nothing on this page is a diagnosis or a recommendation to start, stop, or change care.

To check the license, use the Texas Medical Board public lookup and the NPI Registry. This website is not those agencies.

Other cardiology NPI-1 rows at the same normalized address

Other adult rows in ZIP 78258

12 other adult cardiology NPI rows use ZIP 78258. This is a ZIP match, not a recommendation.