Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mrs. Diana Mahannah-John

Individual provider Methadone Clinic · NPI 1164825261

Mrs. Diana Mahannah-John is a Methadone Clinic in Houston, Texas. Practices as a sole proprietor. Licensed in Texas.

Licensed in
TX
In the registry since
2014
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Practice location Address checks out

7428 Park Place Blvd
Houston, TX 77087-4442
Phone: (713) 643-5858
Fax: (713) 643-2967
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Methadone Clinic (primary) Taxonomy 261QM2800X · Licence 76-1067155 (TX)

Record details

NPI number1164825261
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorYes
NPI enumeratedOctober 2, 2014
Last updated in NPPESOctober 2, 2014

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