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JASON GNASIGAMANY DO
NPI 1598388308
Internal Medicine - Nephrology in Longview, TX

Active since May 27, 2020PECOS EnrolledAccepts Medicare Assignment
3535 N FOURTH ST STE 301, LONGVIEW, TX 75605(903) 234-9992(903) 234-8287 Get Directions Write a Review

NPPES record last updated: July 3, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 3, 2025, Oct 23, 2023, May 27, 2020 (3 updates tracked since 2020).

About Jason Gnasigamany Do NPPES

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

JASON GNASIGAMANY DO (NPI 1598388308) is an individual nephrology provider in Longview, Texas, licensed in Texas (V7890) and active in the NPI registry since May 2020. He is enrolled in Medicare PECOS, is affiliated with Christus Shreveport-bossier Health System, and is a graduate of University Of Texas Medical School At San Antonio (2015).

NPPES Registry Identity

NPI1598388308
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameJASON GNASIGAMANYCredential: DO
Location Address3535 N FOURTH ST STE 301Longview, TX 75605-0037
Mailing Address3535 N Fourth St Ste 301Longview, TX 75605-0037 · (903) 234-9992 · Fax (903) 234-8287
Phone(903) 234-9992
Fax(903) 234-8287
Sole ProprietorNo
Medical School CMSUniversity Of Texas Medical School At San AntonioGraduated 2015
Enumeration DateMay 27, 2020
Last NPPES UpdateJuly 3, 20253 updates tracked since enumeration
NPPES CertifiedJuly 3, 2025
✔ NPI 1598388308 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in TX · V7890
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
3535 N FOURTH ST STE 301, Longview, TX 75605
Open in Google Maps ↗

Accepted Insurance

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

Jason Gnasigamany Do 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 ID6002314556
PECOS Enrollment IDI20250813001383, I20260317004257
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

2

Medicare enrollment records show Jason Gnasigamany reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

East Texas Kidney Specialists,pa
Same address
Nephrology
3535 N FOURTH ST STE 301
Longview, TX 75605
  • Reassigned Medicare billing, Texas enrollment
  • 11 clinicians in this Medicare group
NPI 1184689622 (903) 234-9992
Southern Kidney Associates PLLC
60 mi
Nephrology
1815 E 70TH ST
Shreveport, LA 71105
  • Reassigned Medicare billing, Louisiana enrollment
  • 5 clinicians in this Medicare group
NPI 1194292516 (800) 276-9017

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

Hospital Affiliations CMS Care Compare 5

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

Christus Shreveport-Bossier Health System

Acute Care Hospitals · Shreveport, LA
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number190041
Location1453 E Bert Kouns Industrial LoopShreveport, LA 71105 · Caddo County
Emergency services Birthing friendly

Willis Knighton Medical Center

Acute Care Hospitals · Shreveport, LA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number190111
Location2600 Greenwood RoadShreveport, LA 71103 · Caddo County
Emergency services Birthing friendly

Christus Good Shepherd Medical Center

Acute Care Hospitals · Longview, TX
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450032
Location700 E Marshall AveLongview, TX 75601 · Gregg County
Emergency services Birthing friendly

Ut Health East Texas Henderson Hospital

Acute Care Hospitals · Henderson, TX
OwnershipProprietary
CMS Certification Number450475
Location300 Wilson StreetHenderson, TX 75652 · Rusk County
Emergency services Birthing friendly

Longview Regional Medical Center

Acute Care Hospitals · Longview, TX
2/5 CMS rating
OwnershipProprietary
CMS Certification Number450702
Location2901 N Fourth StLongview, TX 75605 · Gregg County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 75605 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
$126.40 typical visit price
range $54.84 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
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.

Other Providers at the Same Location NPPES 9

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

DR. CHINMAY P PATEL MD
Internal Medicine (Nephrology)
3535 N FOURTH ST STE 301
LONGVIEW, TX 75605
Gregg County (903) 234-9992
EAST TEXAS KIDNEY SPECIALISTS,PA
Internal Medicine (Nephrology)
3535 N FOURTH ST STE 301
LONGVIEW, TX 75605
Gregg County (903) 234-9992
JESSICA APARICIO
Nurse Practitioner (Family)
3535 N FOURTH ST STE 301
LONGVIEW, TX 75605
Gregg County (903) 234-9992
DR. GLENN A MCDONALD MD
Internal Medicine (Nephrology)
3535 N FOURTH ST STE 301
LONGVIEW, TX 75605
Gregg County (903) 234-9992
HAILEY GOZA
Nurse Practitioner (Family)
3535 N FOURTH ST STE 301
LONGVIEW, TX 75605
Gregg County (903) 234-9992
SNEHAL SHRIVASTAVA M.D.
Internal Medicine (Nephrology)
3535 N FOURTH ST STE 301
LONGVIEW, TX 75605
Gregg County (903) 234-9992
DR. VENKATESH S REDDY MD
Internal Medicine (Nephrology)
3535 N FOURTH ST STE 301
LONGVIEW, TX 75605
Gregg County (903) 234-9992
DR. SHOBHA SHAKAMURI MD
Internal Medicine (Nephrology)
3535 N FOURTH ST STE 301
LONGVIEW, TX 75605
Gregg County (903) 234-9992

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 Jason Gnasigamany's NPI number?

The NPI number for Jason Gnasigamany is 1598388308. It was assigned to this individual provider in the NPPES registry on May 27, 2020.

Where is Jason Gnasigamany located?

Jason Gnasigamany practices at 3535 N Fourth St Ste 301, Longview, TX 75605. The listed phone number is (903) 234-9992.

What is Jason Gnasigamany's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Jason Gnasigamany enrolled in Medicare?

Yes. Jason Gnasigamany 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 Jason Gnasigamany's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jason Gnasigamany reassigns Medicare benefits to 2 organizations: East Texas Kidney Specialists,pa (Longview, TX) and Southern Kidney Associates PLLC (Shreveport, LA). 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 Jason Gnasigamany's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Jason Gnasigamany accept?

Health plans from Blue Cross and Blue Shield of Louisiana, Blue Cross and Blue Shield of Texas and HMO Louisiana list Jason Gnasigamany 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 Jason Gnasigamany affiliated with any hospitals?

According to CMS data, Jason Gnasigamany is affiliated with Christus Shreveport-Bossier Health System, Willis Knighton Medical Center, Christus Good Shepherd Medical Center, Ut Health East Texas Henderson Hospital and Longview Regional Medical Center.

When was this NPI record last updated?

The NPPES record for Jason Gnasigamany was last updated on July 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.