Dr. Thishara Merza, MD
- Medicare services, 2024
- 955
- Medicare patients, 2024
- 322
- Part D claims, 2024
- 552
- Hospital affiliations
- 3
- Industry payments
- $217
- Practice address
- 3015 N Ballas Rd, Saint Louis, MO 63131
- Practice phone
- Call (314) 996-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Merza's professional email, personal email and mobile number
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Dr. Thishara Merza is a hospitalist in Saint Louis, Missouri
Dr. Merza practices at Missouri Baptist Medical Center in Saint Louis, Missouri, part of BJC Health.
Dr. Merza's NPI, 1073773347, was assigned on June 11, 2008. Dr. Merza holds Missouri license 2013032872.
- NPI
- 1073773347NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274699319
- NPI enumeration date
- June 11, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 996-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thishara Merza practices at Missouri Baptist Medical Center in Saint Louis, Missouri
Dr. Merza's primary practice is Missouri Baptist Medical Center, at 3015 N Ballas Rd, Saint Louis, MO 63131 in St. Louis County. The practice phone is (314) 996-5000.
- Missouri Baptist Medical Center3015 N Ballas Rd, Saint Louis, MO 63131 · St. Louis CountyPhone(314) 996-5000
Source: Dmand AI Affiliation Data
Dr. Thishara Merza is affiliated with 4 sites of care and 1 medical group
Dr. Merza's primary practice is Missouri Baptist Medical Center in Saint Louis, Missouri, part of BJC Health. Dr. Merza is also affiliated with Barnes-Jewish Hospital. The medical group on file is BJC Medical Group. Dmand AI also links Dr. Merza to 1 more hospital and 1 hospice, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thishara Merza's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Merza practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Missouri Baptist Medical Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across BJC Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Thishara Merza is one of 735 hospitalists in Missouri
Hospitalist is Dr. Merza's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Merza is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Merza's licenses on file in 2 states: Missouri and Maine.
Specialties and state licenses
- Hospitalist, MissouriPrimary
- Maine license
Hospitalists near Dr. Merza
Counts of hospitalists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Thishara Merza billed Medicare for 955 services in 2024
CMS data shows 955 Medicare services from Dr. Merza across 6 procedure codes in 2024, for 322 Medicare patients. Medicare paid $64,753 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Merza's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,0262024: 9557%
Dr. Merza compared with the Missouri median for hospitalists, 2024
- Dr. Merza
- Missouri median
- Medicare services
- 955vs 4342.2 times
- Medicare patients
- 322vs 19169% above
- Part D claims
- 231vs 982.4 times
Medians across 659 hospitalists in Missouri with Dmand AI profiles that report each measure.
Dr. Merza's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thishara Merza treated 322 Medicare patients in 2024, average age 77
CMS counts 322 Medicare patients who saw Dr. Merza in 2024. The largest group is 75 to 84, with 118 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 12% are also on Medicaid. Their average risk score is 2.60, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Merza's median patient age at 76, with 48% women.
Dr. Merza's Medicare patients by age, 2024
Dr. Merza's Medicare patients by sex, 2024
- Women18257%
- Men14043%
Chronic conditions among Dr. Merza's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis65%
- Chronic kidney disease53%
- Heart failure51%
- Anxiety50%
- Ischemic heart disease49%
- Mood disorders48%
Share of Medicare patients with each condition. A patient can have several.
Dr. Merza's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thishara Merza wrote 552 Medicare Part D claims in 2024
In 2024, Dr. Merza wrote 552 Medicare Part D claims for 216 patients. 88% of them were for generic drugs. CMS names the drug for 231 of them, across 14 drugs with 11 or more claims each, at $981 in total drug cost. In 2023, CMS named 146 claims across 9 drugs.
Dr. Merza's Part D claims by kind of drug, 2024
- Generic486 claims88%
- Brand-name and other66 claims12%
Dr. Merza's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Merza's Part D claims, 2024
- Opioids6%35 of 552 claims
- Antibiotics15%85 of 552 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1462024: 23158%
Drugs named by CMS: 14 in 2024, 9 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Thishara Merza takes part in Medicare
Dr. Merza accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Thishara Merza received $217 in industry payments from 2016 to 2021
CMS Open Payments shows 8 general payments to Dr. Merza from 7 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $110.
General payments to Dr. Merza by program year, 2016 to 2021
Companies that paid Dr. Merza the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thishara Merza is board certified in internal medicine
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. Thishara Merza's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Thishara Merza
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Thishara Merza's NPI number?
Dr. Thishara Merza's NPI number is 1073773347. It was assigned on June 11, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Thishara Merza?
Dr. Thishara Merza is a hospitalist in Saint Louis, Missouri. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Thishara Merza practice?
Dr. Merza practices at 3015 N Ballas Rd, Saint Louis, MO 63131. Dr. Merza's primary practice is Missouri Baptist Medical Center in Saint Louis, Missouri, part of BJC Health. Dmand AI also links Dr. Merza to 1 hospital and 1 hospice.
What is Dr. Thishara Merza's office phone number?
The practice phone on file for Dr. Merza is (314) 996-5000.
What is Dr. Thishara Merza's medical license number?
Dr. Merza holds Missouri license 2013032872, one of the licenses on file in 2 states.
Which states has Dr. Thishara Merza been licensed in?
Dmand AI has state licenses on file for Dr. Merza in Missouri and Maine.
Which hospitals is Dr. Thishara Merza affiliated with?
Dr. Merza practices at Missouri Baptist Medical Center in Saint Louis, Missouri. Dr. Merza is also affiliated with Barnes-Jewish Hospital. Dmand AI links Dr. Merza to 1 more hospital.
What medical group is Dr. Thishara Merza part of?
Dr. Merza is linked to BJC Medical Group.
Does Dr. Thishara Merza accept Medicare?
Yes. CMS data shows Dr. Merza billed Medicare for 955 services in 2024, and Dr. Merza accepts Medicare assignment.
How many Medicare patients does Dr. Thishara Merza see?
CMS counts 322 Medicare patients who saw Dr. Merza in 2024, with an average age of 77.
Show 5 more questionsShow fewer questions
Is Dr. Thishara Merza board certified?
Yes. Dr. Merza is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Thishara Merza bill to Medicare?
In 2024, Dr. Merza's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99239) and hospital inpatient care (99222).
What drugs does Dr. Thishara Merza prescribe most?
In 2024 Medicare Part D data, Dr. Merza's most prescribed drugs by claims were Clopidogrel, Carvedilol and Losartan Potassium.
Has Dr. Thishara Merza received payments from drug or device companies?
CMS Open Payments shows $217 in general payments to Dr. Merza from 7 companies from 2016 to 2021. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Thishara Merza been practicing?
Dr. Merza graduated from medical school in 2005, 21 years ago.
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