Jason Gnasigamany, DO
Nephrology Physician · Longview, TX
Jason Gnasigamany, DO is a nephrology physician with a practice address in Longview, Texas, and NPI 1598388308, issued on May 27, 2020. Check the license (Texas V7890, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Jason Gnasigamany
- Credential
- DO
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- V7890 TX
Self-reported in NPPES; status is on the state search - Practice location
- 3535 N Fourth St Ste 301, Longview, TX 75605
- Phone
- (903) 234-9992
- Enumerated
- May 27, 2020
- Record last updated
- Jul 3, 2025
- Fax
- (903) 234-8287
- Medicare enrollment
- Enrolled (PECOS I20260317004257); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 2015
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,159 in Texas → Look up another NPI →
Also registered at 3535 N Fourth St Ste 301
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth Garcia, FNPFamily Nurse Practitioner1962367995
- Glenn McDonald, MDNephrology Physician1336104389
- Chinmay Patel, MDNephrology Physician1164713095
- Venkatesh Reddy, MDNephrology Physician1891750840
- Shobha Shakamuri, MDNephrology Physician1902861446
- Snehal Shrivastava, M.D.Nephrology Physician1669882882
Verify Jason Gnasigamany in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license V7890Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average nephrology physician in 2024
88 Medicare Part D claims for 22 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of claims.
Most prescribed
- Farxiga14 claims
- Losartan Potassium12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- East Texas Kidney Specialists,paLongview, TX
- Southern Kidney Associates PLLCShreveport, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jason Gnasigamany among 1,159 nephrology physician records in Texas
Jason Gnasigamany, DO is one of 1,159 nephrology physician records with a practice address in Texas. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 96% of them.
- NPI issued2020 · 96% of these records are older, 1% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated2015 · median 2001 among the 954 with a school on file
- Record last updated2025 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Texas
There are 1,159 nephrology physician records in Texas.
All 1,159 in Texas → Every provider in Longview → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Glenn McDonald, MDLongview, TX 756051336104389
- Chinmay Patel, MDLongview, TX 756051164713095
- Venkatesh Reddy, MDLongview, TX 756051891750840
- Shobha Shakamuri, MDLongview, TX 756051902861446
- Snehal Shrivastava, M.D.Longview, TX 756051669882882
- Rajiv Vij, M.D.Longview, TX 756051386814226
- Mary McGee, MDLongview, TX 756011770562183
- Nabeel Ahmed, M.D.Tyler, TX 757011003965906
Common questions
What is Jason Gnasigamany, DO's NPI number?
Jason Gnasigamany, DO's National Provider Identifier (NPI) is 1598388308, issued on May 27, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Jason Gnasigamany, DO located?
The NPPES record lists a practice address at 3535 N Fourth St Ste 301, Longview, TX, 75605. Phone: (903) 234-9992. Providers update this record themselves, so call before visiting.
How can I verify Jason Gnasigamany, DO's license?
NPPES lists Texas license number V7890, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jason Gnasigamany, DO prescribe under Medicare Part D?
In 2024, Jason Gnasigamany, DO had 88 Medicare Part D claims for 22 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.