Thishara Merza, MD
Hospitalist Physician · Saint Louis, MO
Thishara Merza, MD is a hospitalist physician with a practice address in Saint Louis, Missouri, and NPI 1073773347, issued on Jun 11, 2008. Check the license (Missouri 2013032872, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Thishara Merza
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- 2013032872 MO
17949 ME
Self-reported in NPPES; status is on the state search - Practice location
- 3015 N Ballas RD, Saint Louis, MO 63131
- Phone
- (314) 996-5772
- Enumerated
- Jun 11, 2008
- Record last updated
- Feb 11, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (314) 996-7691
- Medicare enrollment
- Enrolled (PECOS I20131009000920); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 930 in Missouri → Look up another NPI →
Also registered at 3015 N Ballas RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Nancy Adams, FNP - BCFamily Nurse Practitioner1497280796
- Emmanuel Agyemang, MDHospitalist Physician1235831975
- Ayaz Ahmad, MDInternal Medicine Physician1629573142
- Bazgha AhmadHospitalist Physician1841517158
- Nusrat Ahmad, MDObstetrics & Gynecology Physician1114966348
Verify Thishara Merza in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2013032872Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% more Medicare Part D claims than the average hospitalist physician in 2024
552 Medicare Part D claims for 216 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 35 claims were for opioids.
Most prescribed
- Clopidogrel29 claims
- Carvedilol20 claims
- Losartan Potassium18 claims
- Pantoprazole Sodium18 claims
- Prednisone18 claims
- Amoxicillin-Clavulanate Potass17 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 one group practice
- Physician Groups LCSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thishara Merza among 930 hospitalist physician records in Missouri
Thishara Merza, MD is one of 930 hospitalist physician records with a practice address in Missouri. 87% 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 22% of them.
- NPI issued2008 · 22% of these records are older, 72% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2005 · median 2014 among the 715 with a school on file
- Record last updated2021 · 25% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
419 hospitalist physician records list a practice address in Saint Louis
They are 419 of the 27,605 NPPES records with a practice address in Saint Louis, and 930 hospitalist physician records in Missouri.
All 930 in Missouri → Every provider in Saint Louis → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Steven Hart, M.D.Saint Louis, MO 631311891821997
- Anshu Jain, M.D.Saint Louis, MO 631311588820468
- Fatima Khan, MDSaint Louis, MO 631311083687669
- Lauren Ludwig, MDSaint Louis, MO 631311073775052
- Maanasi Madan, MBBSSaint Louis, MO 631311861658874
- Ernesto Negron, M.D.Saint Louis, MO 631311841475845
- Steven Pepper, M.D.Saint Louis, MO 631311447211222
- Rahul Phatak, MDSaint Louis, MO 631311124086038
Common questions
What is Thishara Merza, MD's NPI number?
Thishara Merza, MD's National Provider Identifier (NPI) is 1073773347, issued on Jun 11, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Thishara Merza, MD located?
The NPPES record lists a practice address at 3015 N Ballas RD, Saint Louis, MO, 63131. Phone: (314) 996-5772. Providers update this record themselves, so call before visiting.
How can I verify Thishara Merza, MD's license?
NPPES lists Missouri license number 2013032872, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thishara Merza, MD prescribe under Medicare Part D?
In 2024, Thishara Merza, MD had 552 Medicare Part D claims for 216 beneficiaries; the average among hospitalist physician prescribers was 521. 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.