Dr. Marc O. Merbaum, MD
- Medicare services, 2024
- 2,622
- Medicare patients, 2024
- 233
- Part D claims, 2024
- 13,141
- Hospital affiliations
- 1
- Industry payments
- $1,553
- Practice address
- 615 New Ballas Road, Saint Louis, MO 63141
- Practice phone
- Call (314) 251-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Merbaum's professional email, personal email and mobile number
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Dr. Marc O. Merbaum is an internist in Saint Louis, Missouri
Dr. Merbaum practices at Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy.
Dr. Merbaum's NPI, 1245204338, was assigned on February 15, 2006. Dr. Merbaum graduated from University of Missouri, Columbia School of Medicine in 1995. Dr. Merbaum holds Missouri license 116179.
- NPI
- 1245204338NPI Registry (opens in a new tab)
- NPI enumeration date
- February 15, 2006
- NPI status
- Active
- Practice phone
- (314) 251-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Marc O. Merbaum practices at Mercy Hospital St. Louis in Saint Louis, Missouri
Dr. Merbaum's primary practice is Mercy Hospital St. Louis, at 615 New Ballas Road, Saint Louis, MO 63141 in St. Louis County. The practice phone is (314) 251-6000.
- Mercy Hospital St. Louis615 New Ballas Road, Saint Louis, MO 63141 · St. Louis CountyPhone(314) 251-6000
Source: Dmand AI Affiliation Data
Dr. Marc O. Merbaum is affiliated with 1 site of care and 1 medical group
Dr. Merbaum's primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy. The medical group on file is Esse Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Marc O. Merbaum's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Merbaum practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Hospital St. Louis | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marc O. Merbaum is one of 2,114 internists in Missouri
Internal medicine is Dr. Merbaum's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Merbaum is licensed in Missouri.
Specialties and state licenses
- Internal medicine, MissouriPrimary
Internists near Dr. Merbaum
Counts of internists 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. Marc O. Merbaum billed Medicare for 2,622 services in 2024
CMS data shows 2,622 Medicare services from Dr. Merbaum across 27 procedure codes in 2024, for 233 Medicare patients. Medicare paid $65,543 for them. Every service was in an office.
Dr. Merbaum's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 1,6412024: 1,38915%
- Office and hospital visits
- 2023: 6342024: 44530%
- Surgery
- 2023: 5702024: 44023%
- Other services
- 2023: 3852024: 26032%
- Tests and treatments
- 2023: 1452024: 8839%
Dr. Merbaum compared with the Missouri median for internists, 2024
- Dr. Merbaum
- Missouri median
- Medicare services
- 2,622vs 5304.9 times
- Medicare patients
- 233vs 21110% above
- Part D claims
- 12,394vs 32538.1 times
Medians across 2,076 internists in Missouri with Dmand AI profiles that report each measure.
Dr. Merbaum'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. Marc O. Merbaum treated 233 Medicare patients in 2024, average age 74
CMS counts 233 Medicare patients who saw Dr. Merbaum in 2024. The largest group is 65 to 74, with 127 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.11, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Merbaum's median patient age at 71, with 33% women.
Dr. Merbaum's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Merbaum's Medicare patients by sex, 2024
- Women9842%
- Men13558%
Chronic conditions among Dr. Merbaum's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis33%
- Chronic kidney disease32%
- Diabetes31%
- Ischemic heart disease20%
- Cancer18%
- Mood disorders18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Merbaum's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women33%
- Men67%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Marc O. Merbaum wrote 13,141 Medicare Part D claims in 2024
In 2024, Dr. Merbaum wrote 13,141 Medicare Part D claims for 805 patients. 88% of them were for generic drugs. CMS names the drug for 12,394 of them, across 148 drugs with 11 or more claims each, at $951,887 in total drug cost. In 2023, CMS named 12,963 claims across 155 drugs.
Dr. Merbaum's Part D claims by kind of drug, 2024
- Generic11,568 claims88%
- Brand-name1,479 claims11%
- Other94 claims1%
Dr. Merbaum'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. Merbaum's Part D claims, 2024
- Opioids2%323 of 13,141 claims
- Antibiotics2%278 of 13,141 claims
- Antipsychotics, patients 65 and over0%12 of 13,141 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: 12,9632024: 12,3944%
Drugs named by CMS: 148 in 2024, 155 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
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Dr. Marc O. Merbaum received $1,553 in industry payments from 2016 to 2025
CMS Open Payments shows 96 general payments to Dr. Merbaum from 22 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $243.
General payments to Dr. Merbaum by program year, 2016 to 2025
Companies that paid Dr. Merbaum the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Marc O. Merbaum graduated from University of Missouri, Columbia School of Medicine
Dr. Merbaum graduated from University of Missouri, Columbia School of Medicine in 1995.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Marc O. Merbaum'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) |
| 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. Marc O. Merbaum
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. Marc O. Merbaum's NPI number?
Dr. Marc O. Merbaum's NPI number is 1245204338. It was assigned on February 15, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Marc O. Merbaum?
Dr. Marc O. Merbaum is an internist in Saint Louis, Missouri. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Marc O. Merbaum practice?
Dr. Merbaum practices at 615 New Ballas Road, Saint Louis, MO 63141. Dr. Merbaum's primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy.
What is Dr. Marc O. Merbaum's office phone number?
The practice phone on file for Dr. Merbaum is (314) 251-6000.
What is Dr. Marc O. Merbaum's medical license number?
Dr. Merbaum holds Missouri license 116179.
Which hospitals is Dr. Marc O. Merbaum affiliated with?
Dr. Merbaum practices at Mercy Hospital St. Louis in Saint Louis, Missouri.
What medical group is Dr. Marc O. Merbaum part of?
Dr. Merbaum is linked to Esse Health.
Does Dr. Marc O. Merbaum accept Medicare?
Yes. CMS data shows Dr. Merbaum billed Medicare for 2,622 services in 2024.
How many Medicare patients does Dr. Marc O. Merbaum see?
CMS counts 233 Medicare patients who saw Dr. Merbaum in 2024, with an average age of 74.
What services does Dr. Marc O. Merbaum bill to Medicare?
In 2024, Dr. Merbaum's most billed Medicare services were surgery: heart and blood vessels (36415), office visit, established patient (99214) and lab and pathology test (80053).
Show 4 more questionsShow fewer questions
Where did Dr. Marc O. Merbaum go to medical school?
Dr. Merbaum graduated from University of Missouri, Columbia School of Medicine in 1995.
What drugs does Dr. Marc O. Merbaum prescribe most?
In 2024 Medicare Part D data, Dr. Merbaum's most prescribed drugs by claims were Amlodipine Besylate, Lisinopril and Atorvastatin Calcium.
Has Dr. Marc O. Merbaum received payments from drug or device companies?
CMS Open Payments shows $1,553 in general payments to Dr. Merbaum from 22 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Marc O. Merbaum been practicing?
Dr. Merbaum graduated from medical school in 1995, 31 years ago.
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