Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. Gregory Matthew Lessans , MD

Anesthesiology โ€ข Houston, TX

Active NPI 1699154971 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

6621 Fannin St
Houston, TX 770302358

Call 2037852802 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

6621 Fannin St

Houston, TX 770302358

Telephone 2037852802
Organization at the Same NPPES Address or Phone
Texas Childrens Hospital Facility NPI 1487600334

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

CMS Doctors and Clinicians lists 2 distinct group names: Anesthesia Company Llc; Gbmc Hospital Based Services Llc. See the list

Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Medical School

University Of Maryland School Of Medicine

Graduation Year

2015

Medicare patients

142 people with Original Medicare in 2024

Different Original Medicare patients in 2024; counts below 11 are hidden; this does not show availability or quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider, 2024.

Medicare-allowed amount

About $5,286 in 2024

The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.

What this does not show: Medicare-allowed amount

This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2024.

Paid by Medicare

About $4,124 in 2024

The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.

What this does not show: Paid by Medicare

This is not the clinician's income and not a measure of quality.

Source: CMS, Medicare Physician & Other Practitioners โ€“ by Provider and Service, 2024.

Industry payments (Open Payments)

Fewer than 11 payment records totaling $21.28 in 2024

Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.

These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.

General: payments not tied to research, such as meals, travel, consulting or speaking fees.

A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.

Source: CMS Open Payments, program year 2024.

Guide: How to read an Open Payments record

Years since graduation

11 years (graduated 2015)

CMS Doctors and Clinicians data list 2015 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File.

NPI first issued

2015

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, โ€œDoes your provider accept Medicare as full payment?โ€

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Lessans has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Lessans as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Houston and Texas

Billing and prescribing volume is not a quality rating.

Medicare Part B services

Fewer Medicare Part B services than 70% of clinicians listed under Anesthesiology in Houston, TX (2024, 585 clinicians with data). Median for this group: 101. Middle half: 42 to 196.

Fewer Medicare Part B services than 70% of clinicians listed under Anesthesiology in Texas (2024, 2,454 clinicians with data). Median for this group: 94. Middle half: 41 to 197.

Medicare-allowed amount

A lower Medicare-allowed amount than 70% of clinicians listed under Anesthesiology in Houston, TX (2024, 585 clinicians with data). Median for this group: $10,308. Middle half: $4,456 to $21,864.

A lower Medicare-allowed amount than 70% of clinicians listed under Anesthesiology in Texas (2024, 2,454 clinicians with data). Median for this group: $10,803. Middle half: $4,556 to $22,244.

Paid by Medicare

A lower Medicare payment amount than 70% of clinicians listed under Anesthesiology in Houston, TX (2024, 585 clinicians with data). Median for this group: $8,252. Middle half: $3,501 to $17,250.

A lower Medicare payment amount than 70% of clinicians listed under Anesthesiology in Texas (2024, 2,454 clinicians with data). Median for this group: $8,494. Middle half: $3,590 to $17,455.

1,131 active clinicians are listed under Anesthesiology with a practice address in Houston, TX (4,638 in Texas).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Houston

1.1% of these 1,131 clinicians have the CMS telehealth indicator.

73.1% of these 1,131 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo ยท Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments ยท Program Year 2024

Program year 2024 (payments made January 1 โ€“ December 31, 2024): fewer than 11 records totaling $21.28.

Manufacturer Payment Nature Product Type Amount ($)
VERTEX PHARMACEUTICALS INCORPORATED
Food and Beverage
In-kind items and services
โ€” General $21.28

Source: CMS Open Payments, program year 2024, released June 30, 2026.

Performed Procedures & Service Volume

Services billed to Original Medicare Part B in 2024.

CMS Part B ยท Data Year 2024
Reporting Year:

CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2022โ€“2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ€“ by Provider and Service data, 2023โ€“2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.

HCPCS Code Services Patients Submitted Charge Medicare Allowed
00140 Anesthesia for other procedure on eye
17 17 $712.06 $135.61
00811 Anesthesia for other procedure on large bowel using an endoscope
14 14 $565.71 $108.28
00142 Anesthesia for lens surgery
13 13 $588.00 $112.70

Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits

Submitted charges are billed amounts, not a price quote for your visit.

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2020-03-13
Anesthesiology Primary Specialty

NUCC Taxonomy Code: 207L00000X

License # reported to NPPES TX S5004

An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Texas Medical Board.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - ANESTHESIOLOGY

Medicare Enrollment ID

I20230221000577

Enrollment State Jurisdiction

MD

PECOS Control ID

6709191315

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File

Gbmc Hospital Based Services Llc

6401 N Charles St, Baltimore, MD 212121016

Phone: 4438492121

Anesthesia Company Llc

2001 Medical Pkwy, Annapolis, MD 214013773

Phone: 4434811000

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

40 listed
Dr. Ghaith Abdulkarim , MD

Anesthesiology - Critical Care Medicine

NPI 1295021236

Doctor of Medicine (M.D.)

NPI 1639151798

Doctor of Medicine (M.D.)

Katherine Amarante

Nurse Anesthetist, Certified Registered

NPI 1184246365
NPI 1003836818

Doctor of Medicine (M.D.)

Dr. Gino Ang , MD

Anesthesiology

NPI 1659355634

Doctor of Medicine (M.D.)

Dr. Sible Antony , MD

Anesthesiology - Pediatric Anesthesiology

NPI 1356784268

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

9 Historical Events
๐Ÿ“
Updated Practice Location March 13, 2020

Registered at 6621 FANNIN ST, HOUSTON, TX 770302358 (Tel: 2037852802)

๐Ÿ“
Updated Business Mailing Address March 13, 2020

Registered at 2450 HOLCOMBE BLVD STE NB-34L, HOUSTON, TX 770212039 (Tel: 8328283660)

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) March 13, 2020

Anesthesiology (license number reported to NPPES: TX S5004)

โœ…
NPI Profile Active May 20, 2015

NPI status registered as active in NPPES database

๐Ÿ“
Practice Location (Initial Record) May 20, 2015

Registered at 333 CEDAR ST # 3, NEW HAVEN, CT 065103206 (Tel: 2037852802)

๐Ÿ“
Business Mailing Address (Initial Record) May 20, 2015

Registered at 333 CEDAR ST # 3, NEW HAVEN, CT 065103206 (Tel: 2037852802)

๐Ÿ‘ค
Provider Name / Credentials (Initial Record) May 20, 2015

Recorded as GREGORY LESSANS, M.D.

๐ŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) May 20, 2015

Student in an Organized Health Care Education/Training Program

๐ŸŸข
Initial NPI Registration & Enumeration May 20, 2015

First registered as active Individual Practitioner in NPPES Database.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1699154971
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: May 20, 2015
Last Update: March 13, 2020
Sole Proprietor: Yes

Other Anesthesiology Specialists in Houston

All Anesthesiology Specialists in Houston

Mailing Address

2450 Holcombe Blvd Ste Nb-34l

Houston, TX 770212039

Phone: 8328283660

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.