Ranil S. Gajanayaka, MD
Nephrology Physician · Irving, TX
Ranil S. Gajanayaka, MD is a nephrology physician with a practice address in Irving, Texas, and NPI 1841452380, issued on Jun 26, 2008. Check the license (Texas Q4580, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Ranil S. Gajanayaka
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- Q4580 TX
Self-reported in NPPES; status is on the state search - Practice location
- 2005 W Park Dr Ste 200, Irving, TX 75061
- Phone
- (214) 358-2300
- Enumerated
- Jun 26, 2008
- Record last updated
- Nov 15, 2023
- Fax
- (214) 579-6984
- Medicare enrollment
- Enrolled (PECOS I20220420000779); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,159 in Texas → Look up another NPI →
Also registered at 2005 W Park Dr Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anas Al Rifai, M.D.Nephrology Physician1750513081
- Amr Aljareh, MDNephrology Physician1700491875
- Arshad Asghar, MDNephrology Physician1255541488
- Asha Chemmalakuzhy, MDNephrology Physician1467651521
- Suresh Chirumamilla, M.DNephrology Physician1528343241
- Jayasree Grandhi, MDNephrology Physician1912933177
Verify Ranil S. Gajanayaka in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license Q4580Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% more Medicare Part D claims than the average nephrology physician in 2024
1,590 Medicare Part D claims for 268 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 22 claims were for opioids.
Most prescribed
- Furosemide132 claims
- Torsemide113 claims
- Nifedipine Er71 claims
- Lisinopril68 claims
- Potassium Chloride66 claims
- Losartan Potassium56 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.
Industry payments in 2024: $272.11
12 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
3 hospitals and group practices
- Range Regional Health ServicesHibbing, MN · Acute Care Hospitals4 of 5 stars
- Dallas Nephrology AssociatesIrving, TX
- Mercy Clinic Oklahoma CommunitiesArdmore, OK
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Ranil S. Gajanayaka among 1,159 nephrology physician records in Texas
Ranil S. Gajanayaka, MD 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 2008, is newer than 62% of them.
- NPI issued2008 · 62% of these records are older, 30% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated2003 · median 2001 among the 954 with a school on file
- Record last updated2023 · 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 Irving → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Anas Al Rifai, M.D.Irving, TX 750611750513081
- Arshad Asghar, MDIrving, TX 750611255541488
- Asha Chemmalakuzhy, MDIrving, TX 750611467651521
- Suresh Chirumamilla, M.DIrving, TX 750611528343241
- Devinda De Soyza, M.D.Irving, TX 750611710972435
- Hanan Fahmy, M.D., ED. M, FASNIrving, TX 750611659387413
- Jayasree Grandhi, MDIrving, TX 750611912933177
- Sandra Lauriat, M.D.Irving, TX 750611134107634
Common questions
What is Ranil S. Gajanayaka, MD's NPI number?
Ranil S. Gajanayaka, MD's National Provider Identifier (NPI) is 1841452380, issued on Jun 26, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Ranil S. Gajanayaka, MD located?
The NPPES record lists a practice address at 2005 W Park Dr Ste 200, Irving, TX, 75061. Phone: (214) 358-2300. Providers update this record themselves, so call before visiting.
How can I verify Ranil S. Gajanayaka, MD's license?
NPPES lists Texas license number Q4580, 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 Ranil S. Gajanayaka, MD prescribe under Medicare Part D?
In 2024, Ranil S. Gajanayaka, MD had 1,590 Medicare Part D claims for 268 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.