Martha St. John, M.D., P.A.
NPI 1134220650 · Psychiatry Physician · Houston, TX
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Martha St. John, M.D., P.A. is a Psychiatry Physician organization in Houston, TX (NPI 1134220650).
Provider details
- NPI number
- 1134220650
- Entity type
- Organization
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Martha St. John, Owner(281) 497-3500
- License
- L9500 (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
19 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
- 2006-09-26
- Last updated
- 2011-07-14
Frequently asked questions
- What is Martha St. John, M.D., P.A.'s NPI number?
- Martha St. John, M.D., P.A.'s National Provider Identifier (NPI) is 1134220650, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Martha St. John, M.D., P.A.?
- Martha St. John, M.D., P.A. is classified in the NPPES registry as Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Martha St. John, M.D., P.A. located?
- Martha St. John, M.D., P.A.'s practice location on file with NPPES is 11767 Katy Fwy, Houston, TX 77079-1716.
- What is Martha St. John, M.D., P.A.'s phone number?
- The practice phone number listed in the NPPES registry for Martha St. John, M.D., P.A. is (281) 497-3500.
- Does Martha St. John, M.D., P.A. accept Medicare?
- Martha St. John, M.D., P.A. 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 Martha St. John, M.D., P.A.?
- The authorized official listed on Martha St. John, M.D., P.A.'s NPPES record is Martha St. John, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Martha St. John, M.D., P.A.'s NPI active?
- Yes — Martha St. John, M.D., P.A.'s NPI (1134220650) is active in the NPPES registry as of the last update on 2011-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.