MR. THEODOROS VOLOYIANNIS M.D.
NPI 1891911228
Colon & Rectal Surgery in Houston, TX

Q: What is Theodoros Voloyiannis's NPI number?

The NPI number for Theodoros Voloyiannis is 1891911228. It was assigned to this individual provider in the NPPES registry on April 17, 2007.

Q: What is Theodoros Voloyiannis's specialty?

The primary specialty registered for this NPI is Colon & Rectal Surgery with taxonomy code 208C00000X.

Active since April 17, 2007PECOS EnrolledAccepts Medicare Assignment

89.44/100

CMS Quality Rating

7400 FANNIN ST STE 1295, HOUSTON, TX 77054(832) 377-3770(713) 341-1574 Get Directions Write a Review

NPPES record last updated: April 15, 2019. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 15, 2019, Mar 28, 2018 (2 updates tracked since 2018).

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About Mr. Theodoros Voloyiannis M.d. NPPES

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

MR. THEODOROS VOLOYIANNIS M.D. (NPI 1891911228) is an individual colon & rectal surgery provider in Houston, Texas, licensed in Texas (M2858) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS, is affiliated with Hca Houston Healthcare Clear Lake, and maintains a secondary practice location in Webster.

NPPES Registry Identity

NPI1891911228

Entity TypeIndividualMale

Primary Taxonomy208C00000X

Provider Legal NameMR. THEODOROS VOLOYIANNISCredential: M.D.

Location Address7400 FANNIN ST STE 1295Houston, TX 77054-1934

Mailing AddressPo Box 911230Dallas, TX 75391-1230 · (972) 997-8000 · Fax (972) 234-0813

Phone(832) 377-3770

Fax(713) 341-1574

Sole ProprietorNo

Medical School CMSOtherGraduated 1998

Enumeration DateApril 17, 2007

Last NPPES UpdateApril 15, 20192 updates tracked since enumeration

✔ NPI 1891911228 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyColon & Rectal SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208C00000X

License✔ Licensed in TX · M2858

Definition

A colon and rectal surgeon is trained to diagnose and treat various diseases of the intestinal tract, colon, rectum, anal canal and perianal area by medical and surgical means. This specialist also deals with other organs and tissues (such as the liver, urinary and female reproductive system) involved with primary intestinal disease.

7400 FANNIN ST STE 1295, Houston, TX 77054

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Secondary Practice Location 1

Location 1400 W Medical Center Blvd Ste 205Webster, TX 77598-4227 · Phone (832) 932-1720 · Fax (281) 332-7616

Other Identifiers 2

Medicaid199815508TX

Medicaid199815507TX

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.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

Mr. Theodoros Voloyiannis 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 ID8123117041

PECOS Enrollment IDI20071129000729

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 13

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.

Diagnostic exam of rectum and lower large bowel using an endoscope 45300

This procedure, known as a sigmoidoscopy, involves using a thin, flexible instrument called an endoscope to examine your lower large bowel and rectum. This helps in identifying any abnormalities or issues that could affect your digestive health.

71 services63 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.

54 services45 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

38 services38 patients

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.

30 services28 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.

26 services26 patients

Diagnostic exam of anus using an endoscope 46600

This procedure involves using a thin, flexible instrument called an endoscope to examine the anal area. It helps detect any abnormal conditions or issues. It's a safe, routine exam performed by a healthcare professional.

24 services22 patients

Removal of polyps or growths of large bowel using a flexible endoscope with electrical cautery 45384

This procedure involves using a flexible tube with a camera, called an endoscope, to view the large intestine. If any abnormal growths or polyps are found, they are removed with an electrically-heated instrument. This is a common way to prevent bowel issues.

18 services18 patients

Partial removal of large bowel and reattachment to rectum using an endoscope 44207

This procedure involves the partial removal of the large bowel, also known as the colon, due to disease or other health concerns. Using an endoscope, a long, flexible tube with a camera, the surgeon will then reconnect the remaining healthy parts of the bowel to the rectum.

13 services13 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.

13 services13 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

12 services11 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

12 services12 patients

Injection of agent into vein to assess blood flow of skin graft or flap 15860

This procedure involves injecting a special substance into your vein to evaluate the blood flow in a skin graft or flap. The substance helps to highlight the blood vessels under imaging, providing a clear picture of how well the graft or flap is receiving blood supply.

11 services11 patients

Tying of multiple internal hemorrhoid groups 46946

Tying of multiple internal hemorrhoid groups is a procedure to treat internal hemorrhoids, which are swollen blood vessels in the rectum. It involves tying off the hemorrhoids to cut off their blood supply, causing them to shrink and eventually fall off. This is done to alleviate discomfort and bleeding.

11 services11 patients

Hospital Affiliations CMS Care Compare

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

Hca Houston Healthcare Clear Lake

Acute Care Hospitals · Webster, TX

3/5 CMS rating

OwnershipProprietary

CMS Certification Number450617

Location500 W Medical Center BlvdWebster, TX 77598 · Harris County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77054 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

$90.40 typical visit price

range $58.24 – $176.98

Typical copayment $22.60 (range $14.56 – $44.24)

Most-billed visit code 99203

Established Patient

$72.62 typical visit price

range $18.60 – $143.93

Typical copayment $18.15 (range $4.65 – $35.98)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

89.44/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

75.85

Promoting Interoperability

100

Improvement Activities

Referred Medical Equipment & Supplies CMS DME claims 4

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

Skin barrier; solid, 4 x 4 or equivalent; each A4362

DME-Orthotic Devices · category DF010N

3 suppliers14 claims490 services$3.10 avg. paid by Medicare

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

DME-Orthotic Devices · category DF010N

3 suppliers16 claims310 services$4.94 avg. paid by Medicare

Ostomy skin barrier, with flange (solid, flexible or accordion), extended wear, without built-in convexity, 4 x 4 inches or smaller, each A4409

DME-Orthotic Devices · category DF010N

2 suppliers11 claims200 services$5.66 avg. paid by Medicare

Skin barrier, wipes or swabs, each A5120

DME-Orthotic Devices · category DF010N

4 suppliers15 claims435 services$0.23 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 2

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

DR. CELESTINE SHAUCHING TUNG MD

Obstetrics & Gynecology (Gynecologic Oncology)

7400 FANNIN ST STE 1295
HOUSTON, TX 77054

Harris County (832) 377-3770

JENNIFER RENEE SASAKI M.D.

Surgery (Surgical Oncology)

7400 FANNIN ST STE 1295
HOUSTON, TX 77054

Harris County (832) 377-3770

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 Theodoros Voloyiannis's NPI number?

The NPI number for Theodoros Voloyiannis is 1891911228. It was assigned to this individual provider in the NPPES registry on April 17, 2007.

Where is Theodoros Voloyiannis located?

Theodoros Voloyiannis practices at 7400 Fannin St Ste 1295, Houston, TX 77054. The listed phone number is (832) 377-3770.

What is Theodoros Voloyiannis's specialty?

The primary specialty registered for this NPI is Colon & Rectal Surgery with taxonomy code 208C00000X.

Is Theodoros Voloyiannis enrolled in Medicare?

Yes. Theodoros Voloyiannis 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 Theodoros Voloyiannis accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 8 other insurers list Theodoros Voloyiannis 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 Theodoros Voloyiannis affiliated with any hospitals?

According to CMS data, Theodoros Voloyiannis is affiliated with Hca Houston Healthcare Clear Lake.

When was this NPI record last updated?

The NPPES record for Theodoros Voloyiannis was last updated on April 15, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.