NIZAR N RAMZAN M.D.,
NPI 1992733992
Internal Medicine - Gastroenterology in Houston, TX

Q: What is Nizar Ramzan's NPI number?

The NPI number for Nizar Ramzan is 1992733992. It was assigned to this individual provider in the NPPES registry on June 29, 2006.

Q: What is Nizar Ramzan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for Nizar Ramzan was last updated on March 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.

Active since June 29, 2006PECOS EnrolledAccepts Medicare Assignment

1504 TAUB LOOP, HOUSTON, TX 77030(713) 873-8890 Get Directions Write a Review

NPPES record last updated: March 24, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 24, 2025, Dec 16, 2024 (2 updates tracked since 2024).

On this page

About Nizar N Ramzan M.d., NPPES

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

NIZAR N RAMZAN M.D., (NPI 1992733992) is an individual gastroenterology provider in Houston, Texas, licensed in Texas (V1978) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Harris Health System, and maintains a secondary practice location in Scottsdale.

NPPES Registry Identity

NPI1992733992

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameNIZAR N RAMZANCredential: M.D.,

Location Address1504 TAUB LOOPHouston, TX 77030-1608

Mailing Address1504 Taub LoopHouston, TX 77030-1608 · (713) 873-8890 · Fax (480) 219-6596

Phone(713) 873-8890

Sole ProprietorNo

Medical School CMSOtherGraduated 1988

Enumeration DateJune 29, 2006

Last NPPES UpdateMarch 24, 20252 updates tracked since enumeration

NPPES CertifiedMarch 24, 2025

✔ NPI 1992733992 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

Licenses✔ Licensed in TX · V1978✔ Licensed in AZ · 24761

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

1504 TAUB LOOP, Houston, TX 77030

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Secondary Practice Location 1

Location 18761 E Bell Rd, SUITE 105Scottsdale, AZ 85260-1315 · Phone (480) 219-6662 · Fax (480) 219-6596

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, Blue Cross Blue Shield of Arizona, Imperial Insurance Companies, Inc. and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Nizar N Ramzan M.d., 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 ID1052301611

PECOS Enrollment IDI20241219004399

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.

Medicare Billing Reassignments

Medicare enrollment records show Nizar Ramzan reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Baylor College Of Medicine

Same address

Family Medicine

1504 TAUB LOOP
Houston, TX 77030

Reassigned Medicare billing, Texas enrollment
2,296 clinicians in this Medicare group

NPI 1053352914 (713) 873-2000

Honorhealth

1,007 mi

General Acute Care Hospital

9003 E SHEA BLVD
Scottsdale, AZ 85260

Reassigned Medicare billing, Arizona enrollment
267 clinicians in this Medicare group

NPI 1386608859 (480) 323-3000

Arizona Gastrointestinal Associates, Plc

1,020 mi

Gastroenterology

11225 N 28TH DR STE B210
Phoenix, AZ 85029

Reassigned Medicare billing, Arizona enrollment
38 clinicians in this Medicare group

NPI 1356609002 (480) 699-2996

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

Areas of Expertise CMS Part B claims 19

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.

585 services416 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.

493 services411 patients

Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month 99439

Chronic Care Management services involve regular check-ins with healthcare professionals to manage two or more chronic conditions. It includes an additional 20 minutes of clinical staff time per month, directed by a healthcare professional, to ensure optimal health management.

492 services44 patients

Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month 99490

Chronic care management services involve a healthcare professional directing clinical staff in managing your chronic conditions. This includes the first 20 minutes per month of services like medication management, care coordination, and health monitoring to help improve your health and quality of life.

282 services44 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

197 services197 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

195 services195 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

183 services179 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

156 services156 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

115 services115 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

54 services54 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

53 services45 patients

Measurement of hydrogen in breath to test for stomach and bowel symptoms 91065

This test involves breathing into a bag to measure hydrogen levels in your breath. High levels can indicate issues with food digestion or absorption in your stomach or intestines. It's non-invasive, painless, and helps diagnose certain gastrointestinal conditions.

46 services29 patients

Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm 43249

This procedure involves using a flexible tube with a camera, called an endoscope, to gently expand narrowed areas in your esophagus, stomach, or upper small bowel. A small balloon is inflated, making it easier for food and liquid to pass through. It's safe and effective.

32 services31 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

25 services25 patients

Telephone medical discussion with physician, 11-20 minutes 99442

This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.

24 services24 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

22 services22 patients

Biopsy of lower large bowel using a flexible endoscope 45331

A biopsy of the lower large bowel involves using a flexible tube with a camera (endoscope) to examine this part of your digestive tract. Small tissue samples may be taken for further examination to detect any abnormalities.

13 services13 patients

Imaging of digestive tract done from the inside of the digestive tract 91110

This procedure, known as an endoscopy, involves a small camera being passed into the digestive tract. It helps doctors to see the inside of your digestive system in detail. This can aid in diagnosing conditions or planning treatments. It's generally safe and can provide valuable information.

13 services13 patients

Destruction of polyp or growth of large bowel using a flexible endoscope 45388

This procedure involves the removal of a polyp or growth in the large bowel. A flexible endoscope, a thin tube with a camera, is inserted through the rectum to visualize and remove the growth. This helps maintain bowel health and prevent complications.

12 services12 patients

Hospital Affiliations CMS Care Compare

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

Harris Health System

Acute Care Hospitals · Houston, TX

3/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number450289

Location2525 Holly HallHouston, TX 77054 · Harris County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77030 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.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Ostomy skin barrier, solid 4 x 4 or equivalent, extended wear, without built-in convexity, each A4385

DME-Orthotic Devices · category DF010N

1 supplier11 claims200 services$4.67 avg. paid by Medicare

Enteral feeding supply kit; syringe fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4034

Other-Enteral and Parenteral · category OB006N

2 suppliers14 claims425 services$2.65 avg. paid by Medicare

Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152

Other-Enteral and Parenteral · category OB006N

1 supplier16 claims9,549 services$0.29 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

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

ZAVEN SARGSYAN MD

Internal Medicine

1504 TAUB LOOP
HOUSTON, TX 77030

Harris County (713) 873-8890

KAYE-ANN ANTONETTE CHRISTIE PA-C

Physician Assistant

1504 TAUB LOOP
HOUSTON, TX 77030

Harris County (713) 873-2000

EMILY MARIE WEBSTER PA-C

Physician Assistant

1504 TAUB LOOP
HOUSTON, TX 77030

Harris County (713) 873-8890

DR. MIGUEL A NIETO D.O.

Emergency Medicine

1504 TAUB LOOP, EMERGENCY CENTER
HOUSTON, TX 77030

Harris County (713) 873-7045

DR. LOUIS BRUNO FORNAGE MD

Emergency Medicine

1504 TAUB LOOP
HOUSTON, TX 77030

Harris County (713) 873-3060

DR. MICHELE TROUTMAN GIFFORD MD

Obstetrics & Gynecology

1504 TAUB LOOP
HOUSTON, TX 77030

Harris County (713) 798-1750

DR. KYLE SUEN M.D.

Emergency Medicine

1504 TAUB LOOP
HOUSTON, TX 77030

Harris County (713) 873-8890

DR. MIYSHA SHAW GIRARDEAU MD, MS

Internal Medicine

1504 TAUB LOOP
HOUSTON, TX 77030

Harris County (771) 387-3889

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 Nizar Ramzan's NPI number?

The NPI number for Nizar Ramzan is 1992733992. It was assigned to this individual provider in the NPPES registry on June 29, 2006.

Where is Nizar Ramzan located?

Nizar Ramzan practices at 1504 Taub Loop, Houston, TX 77030. The listed phone number is (713) 873-8890.

What is Nizar Ramzan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Nizar Ramzan enrolled in Medicare?

Yes. Nizar Ramzan 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.

Which organizations bill Medicare for Nizar Ramzan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nizar Ramzan reassigns Medicare benefits to 3 organizations: Baylor College Of Medicine (Houston, TX), Honorhealth (Scottsdale, AZ) and Arizona Gastrointestinal Associates, Plc (Phoenix, AZ). Each 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 Nizar Ramzan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Nizar Ramzan accept?

Health plans from Blue Cross Blue Shield of Arizona, Blue Cross and Blue Shield of Texas, Imperial Insurance Companies, Inc. and Oscar Health Plan, Inc. list Nizar Ramzan 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 Nizar Ramzan affiliated with any hospitals?

According to CMS data, Nizar Ramzan is affiliated with Harris Health System.

When was this NPI record last updated?

The NPPES record for Nizar Ramzan was last updated on March 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.