NPPES file of Aug 9, 2026

Rahul S. Koushik, M.D.

Nephrology Physician · San Antonio, TX

Rahul S. Koushik, M.D. is a nephrology physician with a practice address in San Antonio, Texas, and NPI 1275518755, issued on Dec 7, 2005. Check the license (Texas M2681, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1275518755
Name
Rahul S. Koushik
Credential
M.D.
Primary taxonomy
Nephrology Physician 207RN0300X
License number
M2681 TX
Self-reported in NPPES; status is on the state search
Practice location
3327 Research Plz, San Antonio, TX 78235
Phone
(210) 268-2477
Enumerated
Dec 7, 2005
Record last updated
Oct 21, 2014 (not updated in 12 years: call before relying on the address or phone)
Medicaid ID
179444801 TX
Medicare enrollment
Enrolled (PECOS I20180710003798); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 3327 Research Plz

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Christine Bender, P.T.Physical Therapist1124370853
  2. Thomas Fisher, M.D.Hematology & Oncology Physician1043233679
  3. Nicholas Gennuso, PTPhysical Therapist1831644970
  4. Andrew Tobon, MDUrology Physician1174503106
  5. Sushma Vemulapalli, MDHematology & Oncology Physician1154510790
  6. Kinjal VoraPhysical Therapist1750655957

Verify Rahul S. Koushik in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license M2681    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Texas license search

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88% fewer Medicare Part D claims than the average nephrology physician in 2024

171 Medicare Part D claims for 69 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.

  1. Rahul Koushik171
  2. Specialty average1,465

Most prescribed

  1. Valsartan13 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

  1. Sound Physicians OF Massachusetts IncBrockton, MA
  2. Virginia Hospital Center Physician Group LLCArlington, VA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (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 San Antonio →

Other nephrology physician records in Texas

  1. Bernardino Abaya, M.D.Houston, TX1740262013
  2. Aisha Abbasi, MDConroe, TX1942837570
  3. Abdul Abdellatif, M.D.Webster, TX1164560595
  4. Dina Abdelwahab, MDDallas, TX1801050208
  5. Mohammed Abdulaziz, MDLaredo, TX1881009215
  6. Muhammad Abdullah, MDSan Antonio, TX1154614832
  7. Nashila Abdulrahim, DODallas, TX1659665180
  8. Mai Abouelsaad, M.D.Houston, TX1790168086
  9. Fadi Abouzahr, MDSan Antonio, TX1982695896
  10. Koshy Abraham, MDFort Worth, TX1780658559

Common questions

What is Rahul S. Koushik, M.D.'s NPI number?

Rahul S. Koushik, M.D.'s National Provider Identifier (NPI) is 1275518755, issued on Dec 7, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Rahul S. Koushik, M.D. located?

The NPPES record lists a practice address at 3327 Research Plz, San Antonio, TX, 78235. Phone: (210) 268-2477. Providers update this record themselves, so call before visiting.

How can I verify Rahul S. Koushik, M.D.'s license?

NPPES lists Texas license number M2681, 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 Rahul S. Koushik, M.D. prescribe under Medicare Part D?

In 2024, Rahul S. Koushik, M.D. had 171 Medicare Part D claims for 69 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.