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NORTH HOUSTON HOSPITALISTS PA
NPI 1225089832
Internal Medicine in Shenandoah, TX

Active since May 16, 2006
8845 SIX PINES DR STE 202, SHENANDOAH, TX 77380(281) 296-8788(832) 384-7128 Get Directions Write a Review

NPPES record last updated: January 30, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About North Houston Hospitalists Pa NPPES

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

NORTH HOUSTON HOSPITALISTS PA (NPI 1225089832), doing business as Respiratory And Sleep Disorders Specialists, is a healthcare organization registered as an internal medicine in Shenandoah, Texas and active in the NPI registry since May 2006. The organization maintains 4 additional practice locations and lists Wael Asi, Owner President, as its authorized official.

NPPES Registry Identity

NPI1225089832
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameNORTH HOUSTON HOSPITALISTS PA
Location Address8845 SIX PINES DR STE 202Shenandoah, TX 77380-4296
Mailing Address8845 Six Pines Dr Ste 203Shenandoah, TX 77380-4296 · (281) 296-8788 · Fax (832) 384-7128
Phone(281) 296-8788
Fax(832) 384-7128
Organization SubpartNo
Authorized OfficialWael AsiOwner President · (281) 296-8788
Enumeration DateMay 16, 2006
Last NPPES UpdateJanuary 30, 2026
NPPES CertifiedJanuary 30, 2026
✔ NPI 1225089832 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
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.
8845 SIX PINES DR STE 202, Shenandoah, TX 77380
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Other Names 1

Doing Business AsRespiratory And Sleep Disorders Specialists

Secondary Practice Locations 4

Location 1800 Peakwood Dr Ste 4CHouston, TX 77090-2914 · Phone (281) 296-8788 · Fax (832) 384-7128
Location 213426 Medical Complex Dr Ste 175Tomball, TX 77375-6586 · Phone (281) 296-8788 · Fax (832) 384-7128
Location 31111 Medical Plaza Dr Ste 250The Woodlands, TX 77380-3477 · Phone (281) 296-8788 · Fax (832) 384-7128
Location 48845 Six Pines Dr Ste 203Shenandoah, TX 77380-4296 · Phone (281) 296-8788 · Fax (832) 384-7128

Other Identifiers 2

Medicaid179298802TX
Medicaid179298801TX

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-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)

North Houston Hospitalists Pa is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

14

Medicare enrollment records show 14 clinicians reassign Medicare billing to North Houston Hospitalists PA, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 9 within 10 miles. They are listed nearest first.

Clinicians by Medicare Specialty 3

Pulmonary Disease8
Internal Medicine5
Nurse Practitioner1

Clinicians, nearest first (14)

Nathan Kirsch
Internal Medicine
NPI 1841793676
8845 SIX PINES DR STE 203
Shenandoah, TX 77380
(281) 296-8788
✔ PECOS✔ Accepts MedicareSame address
Brianna De Ruyter, AGACNP-BC
Nurse Practitioner
NPI 1861150666
1111 MEDICAL PLAZA DR STE 250
The Woodlands, TX 77380
(281) 296-8788
✔ PECOS✔ Accepts Medicare0.3 mi
Jefy Mathew, MD
Pulmonary Disease
NPI 1083602080
1111 MEDICAL PLAZA DR SUITE 250
The Woodlands, TX 77380
(281) 296-8788
✔ PECOS✔ Accepts Medicare0.3 mi
William Rhoton, MD
Pulmonary Disease
NPI 1154597300
1111 MEDICAL PLAZA DR SUITE 250
The Woodlands, TX 77380
(281) 296-8788
✔ PECOS✔ Accepts Medicare0.3 mi
Wael Asi, MD
Pulmonary Disease
NPI 1578551537
1111 MEDICAL PLAZA DR SUITE 250
The Woodlands, TX 77380
(281) 296-8788
✔ PECOS✔ Accepts Medicare0.3 mi
Amarbir Mattewal, MD
Pulmonary Disease
NPI 1346462660
1111 MEDICAL PLAZA DR SUITE 250
The Woodlands, TX 77380
(281) 296-8788
✔ PECOS✔ Accepts Medicare0.3 mi
Ather Siddiqi, MD
Internal Medicine
NPI 1700874716
1111 MEDICAL PLAZA DR SUITE 250
The Woodlands, TX 77380
(281) 296-8788
✔ PECOS✔ Accepts Medicare0.3 mi
Robert Liu, MD
Internal Medicine
NPI 1598227449
1111 MEDICAL PLAZA DR STE 250
The Woodlands, TX 77380
(281) 315-8109
✔ PECOS✔ Accepts Medicare0.3 mi
Asad Chohan, MD
Internal Medicine
NPI 1962907956
1111 MEDICAL PLAZA DR STE 250
Spring, TX 77380
(800) 843-2384
✔ PECOS✔ Accepts Medicare0.3 mi
Mohsin Bajwa, MD
Pulmonary Disease
NPI 1497743462
1125 CYPRESS STATION DR SUITE E
Houston, TX 77090
(281) 537-6300
✔ PECOS✔ Accepts Medicare11 mi
Humberto Sasieta, M.D.
Pulmonary Disease
NPI 1780972497
6431 FANNIN STREET SUITE MSB 1.434
Houston, TX 77030
(832) 325-7222
✔ PECOS✔ Accepts Medicare32 mi
Randy Planegger, MD
Internal Medicine
NPI 1245767706
1 BAYLOR PLZ # BCM620
Houston, TX 77030
(713) 798-5588
✔ PECOS✔ Accepts Medicare32 mi
Hanish Patel, M.D.
Pulmonary Disease
NPI 1073044061
1906 BELLEVIEW AVE CARILION ROANOKE MEMORIAL HOSPITAL
Roanoke, VA 24014
(540) 981-7000
✔ PECOS✔ Accepts Medicare1,016 mi
Salah Fares, MD
Pulmonary Disease
NPI 1780850974
27211 LAHSER RD STE # 200
Southfield, MI 48034
(248) 358-4982
✔ PECOS✔ Accepts Medicare1,086 mi

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 North Houston Hospitalists PA's NPI number?

The NPI number for North Houston Hospitalists PA is 1225089832. It was assigned to this organization in the NPPES registry on May 16, 2006. The provider is doing business as Respiratory and Sleep Disorders Specialists.

Where is North Houston Hospitalists PA located?

North Houston Hospitalists PA is located at 8845 Six Pines Dr Ste 202, Shenandoah, TX 77380. The listed phone number is (281) 296-8788.

What is North Houston Hospitalists PA's specialty?

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

Is North Houston Hospitalists PA enrolled in Medicare?

Yes. North Houston Hospitalists PA is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through North Houston Hospitalists PA?

According to the CMS Revalidation Reassignment List (October 2026 release), 14 clinicians in 3 Medicare specialties reassign their Medicare billing to North Houston Hospitalists 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. The largest specialties are Pulmonary Disease (8), Internal Medicine (5) and Nurse Practitioner (1). Of these, 1 practice at this address and 9 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for North Houston Hospitalists PA was last updated on January 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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.