Martha St. John, M.d., PA in Houston, TX
This organization bills under NPI 1134220650, an organization record issued on Sep 26, 2006 with the primary taxonomy Psychiatry Physician. Each clinician who works there has their own NPI and license.
Organization recordNPPES, Aug 2026
1134220650
- Legal name
- Martha St. John, M.d., PA
- Entity
- Type 2 · organization
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- Practice location
- 11767 KATY FWY SUITE 364, Houston, TX 77079
- Phone
- 281-497-3500
- Enumerated
- Sep 26, 2006
- Record updated
- Jul 14, 2011
- Authorized official
- Owner (title as filed)
2 clinicians CMS lists with Martha St John M D in Houston
- Elizabeth Grizzaffi, PA-CPhysician Assistant1124311584
- Martha St John, MDPsychiatry Physician1073534921
Source: CMS Doctors and Clinicians group affiliations, matched by practice name and city.
Checking an organization
- Confirm the business with the Texas secretary of state.
- Check the HHS-OIG exclusion list for the organization.
- Verify each clinician on their own record and the state license search.
Common questions
Is an organization NPI a license?
No. An NPI identifies who bills. Facilities and the clinicians who work there are licensed separately by the state.
Source: CMS National Plan and Provider Enumeration System (NPPES), monthly file of Aug 9, 2026 (NPPES files on CMS.gov). An NPI identifies who bills; it is not a license.