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GRAINGER DIAGNOSTIC CLINIC, PA
NPI 1710934419
Internal Medicine in Houston, TX

Active since May 28, 2006
511A W TIDWELL RD, HOUSTON, TX 77091(713) 694-9709 Get Directions Write a Review

NPPES record last updated: April 12, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 12, 2021, May 28, 2020, May 7, 2020 and 1 more (4 updates tracked since 2016).

About Grainger Diagnostic Clinic, Pa NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GRAINGER DIAGNOSTIC CLINIC, PA (NPI 1710934419) is a healthcare organization registered as an internal medicine in Houston, Texas and active in the NPI registry since May 2006. The organization lists Henry Jack Grainger, President, as its authorized official.

NPPES Registry Identity

NPI1710934419
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameGRAINGER DIAGNOSTIC CLINIC, PA
Location Address511A W TIDWELL RDHouston, TX 77091-4338
Mailing Address511a W Tidwell RdHouston, TX 77091-4338 · (713) 694-9709
Phone(713) 694-9709
Organization SubpartNo
Authorized OfficialHenry Jack GraingerPresident · (713) 694-9709
Enumeration DateMay 28, 2006
Last NPPES UpdateApril 12, 20214 updates tracked since enumeration
NPPES CertifiedApril 12, 2021
✔ NPI 1710934419 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in TX · E1595
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedInternal Medicine · Cardiovascular DiseaseTaxonomy 207RC0000X · License E1595 (TX)
Also ListedInternal Medicine · Geriatric MedicineTaxonomy 207RG0300X · License E1595 (TX)
511A W TIDWELL RD, Houston, TX 77091
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Other Identifiers 1

Medicaid165616701TX

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X MULTIPLE SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Grainger Diagnostic Clinic, Pa is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Grainger Diagnostic Clinic, PA, which bills Medicare for the services this clinician delivers.

Clinician (1)

Henry Grainger, DO
Internal Medicine
NPI 1306892005
511A W TIDWELL RD
Houston, TX 77091
(713) 694-9709
✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Grainger Diagnostic Clinic, PA's NPI number?

The NPI number for Grainger Diagnostic Clinic, PA is 1710934419. It was assigned to this organization in the NPPES registry on May 28, 2006.

Where is Grainger Diagnostic Clinic, PA located?

Grainger Diagnostic Clinic, PA is located at 511A W Tidwell Rd, Houston, TX 77091. The listed phone number is (713) 694-9709.

What is Grainger Diagnostic Clinic, PA's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Grainger Diagnostic Clinic, PA enrolled in Medicare?

Yes. Grainger Diagnostic Clinic, PA is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Grainger Diagnostic Clinic, PA?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Grainger Diagnostic Clinic, PA. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Grainger Diagnostic Clinic, PA was last updated on April 12, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.