The best colon cancer screening in Houston is the one you can actually get scheduled, afford and finish. For most adults 45 and older, that comes down to three practical questions: can you book without an extra visit, will your plan pay, and who handles the next step if something turns up.
This guide compares five Houston-area options on those questions. It covers screening colonoscopy, stool tests and the eligibility rules that decide which route you can take.
Who wrote this comparison
The practice of James Maher, M.D., a board-certified gastroenterologist in West Houston, published this article. Dr. Maher’s practice is one of the five providers listed. We wrote it to help patients compare options, and we have tried to describe every provider by what its own website states.
The list is in no ranked order. We did not score or rank providers, and we did not use online ratings or review counts.
How we chose and compared providers
Each provider on this list publishes information about colorectal cancer screening on its own website. We then compared them on four points:
- Screening services. Does the provider describe screening colonoscopy, stool tests or both?
- Access. Can an eligible patient schedule a screening colonoscopy without a separate consultation first?
- Follow-up. What happens after a positive stool test or an abnormal finding?
- Cost support. Does the provider publish coverage verification or financial assistance information?
We also checked addresses carefully. Several practices that market to Katy patients have offices with Houston or Richmond mailing addresses, so we list the address each provider publishes.
Five colon cancer screening providers serving Houston
| Provider | Address published | Phone | Direct scheduling for screening |
|---|---|---|---|
| James Maher, M.D. Gastroenterology | 19255 Park Row #104, Houston, TX 77084 | 281-945-5190 | Yes, Direct Access Colonoscopy for eligible patients 45 to 75 |
| Texas Digestive Disease Consultants, Katy office | 2840 Commercial Center Blvd #104, Katy, TX 77494 | 832-463-3860 | Not stated on the Katy page |
| Kelsey-Seybold Clinic | Colonoscopies at its Ambulatory Surgery Centers; Katy Clinic is at 22121 FM 1093, Richmond, TX 77407 | 713-442-0427 | Yes, for Kelsey-Seybold primary care patients 45 to 70 who have never been screened |
| Houston Methodist | Katy-West Houston cancer center: 18400 Katy Fwy, MOB 1, Suite 120, Houston, TX 77094 | 713-790-3333 (colonoscopy) | Call to see whether you qualify to self-schedule |
| Harris Health | Outpatient GI lab at Quentin Mease Health Center | 713-566-6509 (eligibility) | Patients called from a clinically prioritized wait list |
James Maher, M.D. Gastroenterology (West Houston, serving Katy)
Dr. Maher is board certified in gastroenterology and internal medicine, and he personally performs every colonoscopy at the practice. The office sits in the Park Row Medical District at 19255 Park Row #104, Houston, TX 77084, and serves Katy, West Houston and Cypress. The office address is in Houston, not Katy.
Through Direct Access Colonoscopy, patients 45 to 75 in generally good health can skip the consultation visit. That includes people due for a routine screening and people who need a colonoscopy after a positive Cologuard or FIT result. Patients with heart or lung conditions, insulin-dependent diabetes, kidney disease, blood thinners other than low-dose aspirin, or active digestive symptoms see Dr. Maher first.
The practice accepts Medicare and most major insurance plans, and staff verify coverage before scheduling. Hours run Monday through Wednesday 8:30 a.m. to 5 p.m., Thursday until 6 p.m., and Friday until 1 p.m.
Texas Digestive Disease Consultants, Katy office
This multi-location gastroenterology group has an office inside Katy city limits at 2840 Commercial Center Blvd #104, Katy, TX 77494. The Katy page lists colonoscopy, colon cancer screening and flexible sigmoidoscopy among its services, along with Usman Ansari, D.O., Frederick Peng, M.D., and Moazzam Sana, M.D.
You can call 832-463-3860 or send an online request; the practice says it responds within 48 hours. The Katy page does not describe an open-access screening option, so plan on asking whether you need a consultation first. Accepted insurance plans are listed on a separate page of the group’s site.
Kelsey-Seybold Clinic
Kelsey-Seybold runs a Direct Access Colonoscopy program for its own primary care patients. To qualify, you must be 45 to 70, in good health, and have never had a colon screening. A nurse confirms eligibility by phone. Patients with conditions such as COPD, heart failure or advanced kidney disease must see a Kelsey-Seybold gastroenterologist first.
Colonoscopies take place at the clinic’s Ambulatory Surgery Centers. Its Katy Clinic is at 22121 FM 1093, Richmond, TX 77407, and its published specialty list for that site does not include gastroenterology. Ask where your procedure would be done. You can book through the MyKelseyOnline portal or the 24/7 contact center at 713-442-0427.
Houston Methodist
Houston Methodist’s screening page lists the widest range of tests in this comparison: colonoscopy, flexible sigmoidoscopy, CT colonography, high-sensitivity FOBT, FIT, Cologuard and a blood-based test. For a colonoscopy, call 713-790-3333 to find out whether you qualify to schedule it yourself.
For follow-up, Houston Methodist runs a Katy-West Houston cancer center at 18400 Katy Fwy, Medical Office Building 1, Suite 120, Houston, TX 77094 (832-522-2873). Its team includes surgeons, oncologists, pathologists and oncology nurse navigators. Confirm which campus would perform your screening, since the colonoscopy page does not name one.
Harris Health
Harris Health is the public health system for Harris County. Its Financial Assistance Program covers Harris County residents with family income at or below 150% of the federal poverty level, after they apply for any other coverage they may qualify for, such as Medicaid or Marketplace plans. Applications are free, and the eligibility call center is 713-566-6509.
Harris County has described Harris Health’s GI labs as running at maximum capacity, with patients waiting for colonoscopies. County ARPA funding is paying for a new outpatient GI lab at Quentin Mease Health Center, on a bus route, to cut that backlog. Patients are contacted from a clinically prioritized wait list. Expect a longer wait than at a private practice, and keep your contact information current.
Colorectal cancer screening options and eligibility
The U.S. Preventive Services Task Force recommends colorectal cancer screening for adults 45 to 75 at average risk. People 76 to 85 should decide with their doctor based on health and screening history. Most of the options below are approved for people with no symptoms and no personal or strong family history.
| Test | How often | Done where | Next step if abnormal |
|---|---|---|---|
| FIT | Every year | At home | Colonoscopy |
| Stool DNA-FIT (Cologuard) | Every 1 to 3 years | At home | Colonoscopy |
| CT colonography | Every 5 years | Imaging center | Colonoscopy |
| Flexible sigmoidoscopy | Every 5 years | Clinic or endoscopy center | Colonoscopy |
| Colonoscopy | Every 10 years | Endoscopy center or hospital | Polyps usually removed during the same exam |
When to skip the stool test
Stool tests and the blood test are for average-risk people with no symptoms. If you have rectal bleeding, a change in bowel habits, unexplained weight loss, a personal history of polyps, or a parent or sibling with colorectal cancer, talk to a gastroenterologist about a colonoscopy. Your exam may be billed as diagnostic instead of preventive.
When direct access makes sense
Direct-access programs work for healthy people due for routine screening. Dr. Maher’s program also accepts patients who need a follow-up colonoscopy after a positive stool test. If you take blood thinners or have heart, lung or kidney disease, every program in this comparison asks you to see a specialist first. Read more on our colon cancer screening page.
Insurance and follow-up costs
For most insured adults, a preventive colonoscopy costs nothing out of pocket when it is in network and billed as screening. The surprises come from the details.
- Private plans. Non-grandfathered plans must cover USPSTF-recommended screening without cost sharing. Federal guidance also bars cost sharing for polyp removal during a screening colonoscopy and, for plan years starting on or after May 31, 2022, for the colonoscopy that follows a positive stool test.
- Medicare. Part B pays the full cost of a screening colonoscopy when the provider accepts assignment, including a follow-up after a positive stool test. If a polyp is removed, you pay 15% of the approved amount for the doctor and the facility in 2026.
- Texas law. State-regulated plans must cover screening for adults 45 and older at normal risk, plus a follow-up colonoscopy when initial results are abnormal. Self-funded employer plans follow federal rules instead.
- No coverage. Harris County residents with income at or below 150% of the federal poverty level can apply for Harris Health financial assistance.
Coverage checks for budget-conscious patients
Make these calls before you book:
- Ask your plan whether the provider, the facility and the anesthesia provider are all in network.
- Ask whether a screening colonoscopy, polyp removal and pathology are covered as preventive care with no cost sharing.
- Ask whether you need a referral or prior authorization.
- Ask the provider’s office to verify your benefits and give you a written estimate before the procedure date.
A stool test can look cheaper, but a positive result leads to a colonoscopy anyway. If you are uninsured, price the follow-up before you choose the first test.
Common colon screening questions
Do I need a referral for a preventive colonoscopy in Houston?
That depends on your plan. HMO plans often require one. Some practices, including Dr. Maher’s, let eligible patients schedule directly and confirm referral rules when you call.
Is a Katy address different from a West Houston address for insurance?
No. Your plan cares about whether the provider and facility are in network, not the city name. But addresses matter for travel, since several practices that serve Katy have Houston or Richmond addresses.
How long does a screening colonoscopy take?
The procedure itself usually takes 30 to 45 minutes under sedation at Dr. Maher’s office, and you go home the same day. You will need someone to drive you.
Can I switch from a stool test to a colonoscopy?
Yes. You can choose colonoscopy at any screening point. If your last stool test was normal, ask your plan whether a colonoscopy is covered before your next stool test is due.
Schedule a colon cancer screening consultation
Dr. Maher’s office at 19255 Park Row #104 in Houston sees patients from Katy, West Houston and Cypress, and same-week appointments are often available. Staff will check whether you qualify for direct access, verify your benefits and tell you about any costs in advance. You can find directions on our location page.
If you are looking for the best colon cancer screening in Houston for your health and your budget, start with a conversation. Call 281-945-5190 to request a screening consultation, or see whether you qualify for Direct Access Colonoscopy.
Frequently asked questions
What is the best colon cancer screening test for Houston adults?
The best test is one you will complete on schedule. Colonoscopy every 10 years and yearly FIT are both recommended for average-risk adults 45 to 75; a doctor can help you choose.
Can I schedule a screening colonoscopy without a consultation in Houston?
Some programs allow it. Dr. Maher’s Direct Access Colonoscopy accepts eligible patients 45 to 75, and Kelsey-Seybold offers direct access to its own primary care patients 45 to 70.
Does insurance cover a colonoscopy after a positive Cologuard or FIT test?
Medicare and most private plans with plan years starting on or after May 31, 2022 treat it as screening with no cost sharing. Medicare polyp-removal coinsurance can still apply.
Where can uninsured Houston residents get colorectal cancer screening?
Harris County residents with income at or below 150% of the federal poverty level can apply for Harris Health’s Financial Assistance Program by calling 713-566-6509.
What should I confirm before booking a preventive colonoscopy?
Confirm that the doctor, facility and anesthesia provider are in network, whether you need a referral, and whether polyp removal and pathology carry cost sharing.
