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ESTEBAN DARIO GNASS MD
NPI 1427469352
Pathology - Anatomic Pathology & Clinical Pathology in Cypress, TX

Active since May 13, 2014PECOS EnrolledAccepts Medicare Assignment
82.6/100
CMS Quality Rating
21214 NORTHWEST FWY, CYPRESS, TX 77429(281) 440-2829(281) 440-2293 Get Directions Write a Review

NPPES record last updated: April 15, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 15, 2024, Apr 7, 2021 (2 updates tracked since 2021).

About Esteban Dario Gnass Md NPPES

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

ESTEBAN DARIO GNASS MD (NPI 1427469352) is an individual anatomic pathology & clinical pathology provider in Cypress, Texas, licensed in Texas (T7928) and active in the NPI registry since May 2014. He is enrolled in Medicare PECOS, is affiliated with Memorial Hermann - Texas Medical Center, and is a graduate of Other (2012).

NPPES Registry Identity

NPI1427469352
Entity TypeIndividualMale
Primary Taxonomy207ZP0102X
Provider Legal NameESTEBAN DARIO GNASSCredential: MD
Location Address21214 NORTHWEST FWYCypress, TX 77429-2105
Mailing AddressPo Box 746559Atlanta, GA 30374-6559 · (281) 440-2829 · Fax (281) 440-2293
Phone(281) 440-2829
Fax(281) 440-2293
Sole ProprietorNo
Medical School CMSOtherGraduated 2012
Enumeration DateMay 13, 2014
Last NPPES UpdateApril 15, 20242 updates tracked since enumeration
NPPES CertifiedApril 15, 2024
✔ NPI 1427469352 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
Licenses✔ Licensed in TX · T7928✔ Licensed in CA · A155818
Definition
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
Also ListedPathology · Blood Banking & Transfusion MedicineTaxonomy 207ZB0001X · License A155818 (CA), T7928 (TX)
Also ListedPathology · Clinical InformaticsTaxonomy 207ZC0008X · License T7928 (TX), A155818 (CA)
21214 NORTHWEST FWY, Cypress, TX 77429
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, Oscar Health, Oscar Insurance Company.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

Esteban Dario Gnass Md 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 ID7810112794
PECOS Enrollment IDI20230602001873
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 Reassignment

Medicare enrollment records show Esteban Gnass reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Gulf Coast Pathology Program PLLC
20 mi
Anatomic Pathology & Clinical Pathology
1313 HERMANN DR
Houston, TX 77004
  • Reassigned Medicare billing, Texas enrollment
  • 42 clinicians in this Medicare group
NPI 1629643069 (713) 527-5000

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 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.

Pathology examination of tissue using a microscope, intermediate complexity 88305
A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.
673 services300 patients
Special stained specimen slides to examine tissue, each additional procedure 88341
Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.
181 services41 patients
Special stained specimen slides to examine tissue, initial procedure 88342
This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.
148 services108 patients
Pathology examination of tissue using a microscope, moderately low complexity 88304
A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.
71 services59 patients
Preparation of tissue for examination by removing any calcium present 88311
This procedure involves treating tissue samples to remove any calcium, which can interfere with the examination. The tissue is soaked in a special solution that safely dissolves the calcium, leaving the tissue intact for accurate analysis. This helps in making precise diagnoses.
49 services38 patients
Cell examination of specimen, selective cellular enhancement technique 88112
Cell examination of a specimen using selective cellular enhancement technique is a lab process that improves the visibility of certain cells in a sample. It helps in identifying abnormalities or diseases. The process is non-invasive, safe, and aids in accurate diagnosis.
47 services40 patients

Hospital Affiliations CMS Care Compare 4

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

Memorial Hermann - Texas Medical Center

Acute Care Hospitals · Houston, TX
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450068
Location6411 FanninHouston, TX 77030 · Harris County
Emergency services Birthing friendly

Hca Houston Healthcare Conroe

Acute Care Hospitals · Conroe, TX
2/5 CMS rating
OwnershipProprietary
CMS Certification Number450222
Location504 Medical Center BlvdConroe, TX 77304 · Montgomery County
Emergency services Birthing friendly

Hca Houston Healthcare Tomball

Acute Care Hospitals · Tomball, TX
2/5 CMS rating
OwnershipProprietary
CMS Certification Number450670
Location605 HolderriethTomball, TX 77375 · Harris County
Emergency services Birthing friendly

Hca Houston Healthcare Kingwood

Acute Care Hospitals · Kingwood, TX
3/5 CMS rating
OwnershipProprietary
CMS Certification Number450775
Location22999 Us Hwy 59Kingwood, TX 77325 · Harris County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77429 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.

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.

82.6/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality82.04
Improvement Activities40
Cost63.17

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.

DANIEL R BACKLAS MD
Radiology (Diagnostic Radiology)
21214 NORTHWEST FWY, SUITE 220
CYPRESS, TX 77429
Harris County (832) 912-3600
ROY KUMAR MD
Radiology (Diagnostic Radiology)
21214 NORTHWEST FWY, SUITE 220
CYPRESS, TX 77429
Harris County (832) 912-3600
SANIA RAHIM-GILANI MD
Radiology (Diagnostic Radiology)
21214 NORTHWEST FWY
CYPRESS, TX 77429
Harris County (713) 441-7558
ELIZABETH ASHLEY BARNETT MSN, APRN, FNP-C
Nurse Practitioner (Family)
21214 NORTHWEST FWY
CYPRESS, TX 77429
Harris County (832) 912-3500
KELLY ARMSTRONG APRN-CNP
Nurse Practitioner (Acute Care)
21214 NORTHWEST FWY
CYPRESS, TX 77429
Harris County (707) 689-8694
DANIEL JIN-YOUNG KIM MD
Emergency Medicine
21214 NORTHWEST FWY, EMERGENCY DEPARTMENT
CYPRESS, TX 77429
Harris County (832) 912-3773
MIR ALI MD
Family Medicine
21214 NORTHWEST FWY
CYPRESS, TX 77429
Harris County (832) 912-3791
OURANIA KAMPAGIANNI M.D
Pathology (Anatomic Pathology & Clinical Pathology)
21214 NORTHWEST FWY
CYPRESS, TX 77429
Harris County (832) 912-3799

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 Esteban Gnass's NPI number?

The NPI number for Esteban Gnass is 1427469352. It was assigned to this individual provider in the NPPES registry on May 13, 2014.

Where is Esteban Gnass located?

Esteban Gnass practices at 21214 Northwest Fwy, Cypress, TX 77429. The listed phone number is (281) 440-2829.

What is Esteban Gnass's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Esteban Gnass enrolled in Medicare?

Yes. Esteban Gnass 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 organization bills Medicare for Esteban Gnass's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Esteban Gnass reassigns Medicare benefits to Gulf Coast Pathology Program PLLC (Houston, TX). The 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 Esteban Gnass's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Esteban Gnass accept?

Health plans from Blue Cross and Blue Shield of Texas, Oscar Health and Oscar Insurance Company list Esteban Gnass 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 Esteban Gnass affiliated with any hospitals?

According to CMS data, Esteban Gnass is affiliated with Memorial Hermann - Texas Medical Center, Hca Houston Healthcare Conroe, Hca Houston Healthcare Tomball and Hca Houston Healthcare Kingwood.

When was this NPI record last updated?

The NPPES record for Esteban Gnass was last updated on April 15, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.