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THERESE LAINE SISON
NPI 1841618295
Internal Medicine in Houston, TX

Active since April 02, 2014PECOS EnrolledAccepts Medicare Assignment
427 W 20TH ST STE 500, HOUSTON, TX 77008(713) 363-9830 Get Directions Write a Review

NPPES record last updated: April 23, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Oct 4, 2018, Jan 29, 2017 (2 updates tracked since 2017).

About Therese Laine Sison NPPES

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

THERESE LAINE SISON (NPI 1841618295) is an individual internal medicine provider in Houston, Texas, licensed in Texas (R1455) and active in the NPI registry since April 2014. She is enrolled in Medicare PECOS, is affiliated with Memorial Hermann Hospital System, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1841618295
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameTHERESE LAINE SISON
Location Address427 W 20TH ST STE 500Houston, TX 77008-2431
Mailing Address1001 Studewood St Ste 200bHouston, TX 77008-7190 · (713) 363-9830
Phone(713) 363-9830
Sole ProprietorNo
Medical School CMSUniversity Of Mississippi School Of MedicineGraduated 2014
Enumeration DateApril 2, 2014
Last NPPES UpdateApril 23, 20252 updates tracked since enumeration
NPPES CertifiedApril 23, 2025
✔ NPI 1841618295 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in TX · R1455
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 ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
427 W 20TH ST STE 500, Houston, TX 77008
Open in Google Maps ↗

Secondary Practice Locations 2

Location 16431 Fannin St, Suite MSB 1.134Houston, TX 77030-1501 · Phone (713) 500-6500 · Fax (713) 500-6497
Location 21001 Studewood St Ste 200BHouston, TX 77008 · Phone (713) 363-9830

Other Identifiers 1

Medicaid370933903TX

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Community Health Choice, Molina Healthcare, WellPoint.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Therese Laine Sison is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1355628736
PECOS Enrollment IDI20170512001181
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 11

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
260 services145 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
119 services88 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
82 services82 patients
Annual depression screening, 5 to 15 minutes G0444
An annual depression screening is a short, routine evaluation to check for signs of depression. It involves answering a series of questions about your feelings, thoughts, and behaviors. The process takes about 15 minutes and helps detect depression early for better management.
68 services68 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
36 services35 patients
Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use 90677
The Pneumococcal Conjugate Vaccine (PCV20) is a shot given to protect against 20 types of bacteria that can cause serious infections like pneumonia and meningitis. It's administered through a muscle, usually in the arm. It's important for overall health.
34 services34 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Memorial Hermann Hospital System

Acute Care Hospitals · Houston, TX
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450184
Location1635 North Loop WestHouston, TX 77008 · Harris County
Emergency services Birthing friendly

Houston Methodist Hospital

Acute Care Hospitals · Houston, TX
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450358
Location6565 FanninHouston, TX 77030 · Harris County
Emergency services Birthing friendly

Houston Methodist Willowbrook Hospital

Acute Care Hospitals · Houston, TX
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450844
Location18220 State Highway 249Houston, TX 77070 · Harris County
Emergency services Birthing friendly

Houston Methodist West Hospital

Acute Care Hospitals · Houston, TX
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number670077
Location18500 Katy FreewayHouston, TX 77094 · Harris County
Emergency services Birthing friendly

Houston Methodist The Woodlands Hospital

Acute Care Hospitals · The Woodlands, TX
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number670122
Location17201 Interstate 45 SouthThe Woodlands, TX 77385 · Montgomery County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77008 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$134.06 typical visit price
range $58.24 – $176.98
Typical copayment $33.51 (range $14.56 – $44.24)
Most-billed visit code 99204
Established Patient
$102.71 typical visit price
range $18.60 – $143.93
Typical copayment $25.67 (range $4.65 – $35.98)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JOO LEE DO
Internal Medicine
427 W 20TH ST STE 500
HOUSTON, TX 77008
Harris County (713) 363-9830
OWEN E MC CORMACK D.O.
Family Medicine
427 W 20TH ST STE 500
HOUSTON, TX 77008
Harris County (713) 363-9830
AUBREY PAXSON DO
Internal Medicine
427 W 20TH ST STE 500
HOUSTON, TX 77008
Harris County (713) 363-9830

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 Therese Sison's NPI number?

The NPI number for Therese Sison is 1841618295. It was assigned to this individual provider in the NPPES registry on April 2, 2014.

Where is Therese Sison located?

Therese Sison practices at 427 W 20th St Ste 500, Houston, TX 77008. The listed phone number is (713) 363-9830.

What is Therese Sison's specialty?

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

Is Therese Sison enrolled in Medicare?

Yes. Therese Sison is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Therese Sison accept?

Health plans from Community Health Choice, Molina Healthcare and WellPoint list Therese Sison as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Therese Sison affiliated with any hospitals?

According to CMS data, Therese Sison is affiliated with Memorial Hermann Hospital System, Houston Methodist Hospital, Houston Methodist Willowbrook Hospital, Houston Methodist West Hospital and Houston Methodist The Woodlands Hospital.

When was this NPI record last updated?

The NPPES record for Therese Sison was last updated on April 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.