Dr. Arjun Gaurang Merchant, MD
- Medicare services, 2024
- 141
- Medicare patients, 2024
- 71
- Part D claims, 2024
- 107
- Publications
- 2
- Hospital affiliations
- 1
- Practice address
- 4921 Parkview Pl, Saint Louis, MO 63110
- Practice phone
- Call (314) 362-3937
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Washington University School of Medicine
Saint Louis, Missouri
Find Dr. Merchant's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Arjun Gaurang Merchant is a retina specialist (ophthalmology) physician in Saint Louis, Missouri
Dr. Merchant practices at Washington University School of Medicine in Saint Louis, Missouri.
Dr. Merchant's NPI, 1093342040, was assigned on March 26, 2020. Dr. Merchant graduated from University of Texas Medical School at Houston in 2020. Dr. Merchant holds Missouri license 2024019704.
- NPI
- 1093342040NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5496294472
- NPI enumeration date
- March 26, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 362-3937
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Arjun Gaurang Merchant practices at Washington University School of Medicine in Saint Louis, Missouri
Dr. Merchant's primary practice is Washington University School of Medicine, at 4921 Parkview Pl, Saint Louis, MO 63110 in Saint Louis City. The practice phone is (314) 362-3937.
- Washington University School of Medicine4921 Parkview Pl, Saint Louis, MO 63110 · Saint Louis CityPhone(314) 362-3937
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Arjun Gaurang Merchant is affiliated with 3 sites of care and 1 medical group
Dr. Merchant's primary practice is Washington University School of Medicine in Saint Louis, Missouri. Dr. Merchant is also affiliated with Barnes-Jewish Hospital. The medical group on file is WashU Medicine Psychiatry. Dmand AI also links Dr. Merchant to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Arjun Gaurang Merchant's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Merchant practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Washington University School of Medicine | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Arjun Gaurang Merchant is one of 41 retina specialist (ophthalmology) physicians in Missouri
Retina specialist is Dr. Merchant's primary specialty in the NPI Registry, under taxonomy code 207WX0107X. Dr. Merchant is licensed in Missouri.
Specialties and state licenses
- Retina specialist (ophthalmology), MissouriPrimary
Retina specialist (ophthalmology) physicians near Dr. Merchant
Counts of retina specialist (ophthalmology) physicians 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. Arjun Gaurang Merchant billed Medicare for 141 services in 2024
CMS data shows 141 Medicare services from Dr. Merchant across 4 procedure codes in 2024, for 71 Medicare patients. Medicare paid $33,926 for them. Every service was in an office.
Dr. Merchant's Medicare services by type, 2024
- Tests and treatments52
- Drugs given in the office44
- Surgery23
- Office and hospital visits22
Dr. Merchant compared with the Missouri median for retina specialist (ophthalmology) physicians, 2024
- Dr. Merchant
- Missouri median
- Medicare services
- 141vs 7,16298% below
- Medicare patients
- 71vs 57688% below
- Part D claims
- 68vs 33580% below
Medians across 39 retina specialist (ophthalmology) physicians in Missouri with Dmand AI profiles that report each measure.
Dr. Merchant'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.
Need commercial claims for Dr. Merchant?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Merchant and other retina specialist (ophthalmology) physicians in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Arjun Gaurang Merchant treated 71 Medicare patients in 2024, average age 70
CMS counts 71 Medicare patients who saw Dr. Merchant in 2024. The largest group is 65 to 74, with 26 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 2.26, 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. Merchant's median patient age at 69, with 50% women.
Dr. Merchant's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Merchant's Medicare patients by sex, 2024
- Women3854%
- Men3346%
Chronic conditions among Dr. Merchant's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes49%
- Arthritis44%
- Chronic kidney disease41%
- Ischemic heart disease34%
- Heart failure23%
- Anxiety21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Merchant's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Arjun Gaurang Merchant wrote 107 Medicare Part D claims in 2024
In 2024, Dr. Merchant wrote 107 Medicare Part D claims for 51 patients. 57% of them were for generic drugs. CMS names the drug for 68 of them, across 4 drugs with 11 or more claims each, at $1,199 in total drug cost. In 2023, CMS named 274 claims across 9 drugs.
Dr. Merchant's Part D claims by kind of drug, 2024
- Generic61 claims57%
- Brand-name46 claims43%
Dr. Merchant'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2742024: 6875%
Drugs named by CMS: 4 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. Arjun Gaurang Merchant takes part in Medicare
Dr. Merchant 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. Arjun Gaurang Merchant has 2 publications on record
Dmand AI links 2 papers to Dr. Merchant, published from 2015 to 2024.
Recent publications by Dr. Merchant
Acta Biomater
See who Dr. Merchant researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Merchant works with, so you can find a warm path to the right retina specialist (ophthalmology) physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Arjun Gaurang Merchant received $167 in industry payments from 2021 to 2025
CMS Open Payments shows 2 general payments to Dr. Merchant from 2 drug and device companies from 2021 to 2025. Food and beverage make up the largest share, 100% of the total. Regeneron Pharmaceuticals, Inc. paid the most, $122.
General payments to Dr. Merchant by program year, 2021 to 2025
Companies that paid Dr. Merchant the most, 2021 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Arjun Gaurang Merchant graduated from University of Texas Medical School at Houston
Dr. Merchant graduated from University of Texas Medical School at Houston in 2020.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Arjun Gaurang Merchant'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Arjun Gaurang Merchant
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. Arjun Gaurang Merchant's NPI number?
Dr. Arjun Gaurang Merchant's NPI number is 1093342040. It was assigned on March 26, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. Arjun Gaurang Merchant?
Dr. Arjun Gaurang Merchant is a retina specialist (ophthalmology) physician in Saint Louis, Missouri. The primary specialty in the NPI Registry is Retina Specialist (Ophthalmology) Physician (taxonomy code 207WX0107X).
Where does Dr. Arjun Gaurang Merchant practice?
Dr. Merchant practices at 4921 Parkview Pl, Saint Louis, MO 63110. Dr. Merchant's primary practice is Washington University School of Medicine in Saint Louis, Missouri. Dmand AI also links Dr. Merchant to 1 group practice or clinic.
What is Dr. Arjun Gaurang Merchant's office phone number?
The practice phone on file for Dr. Merchant is (314) 362-3937.
What is Dr. Arjun Gaurang Merchant's medical license number?
Dr. Merchant holds Missouri license 2024019704.
Which hospitals is Dr. Arjun Gaurang Merchant affiliated with?
Dr. Merchant is affiliated with Barnes-Jewish Hospital.
What medical group is Dr. Arjun Gaurang Merchant part of?
Dr. Merchant is linked to WashU Medicine Psychiatry.
Does Dr. Arjun Gaurang Merchant accept Medicare?
Yes. CMS data shows Dr. Merchant billed Medicare for 141 services in 2024, and Dr. Merchant accepts Medicare assignment.
How many Medicare patients does Dr. Arjun Gaurang Merchant see?
CMS counts 71 Medicare patients who saw Dr. Merchant in 2024, with an average age of 70.
What services does Dr. Arjun Gaurang Merchant bill to Medicare?
In 2024, Dr. Merchant's most billed Medicare services were eye exam or test (92134), injected or infused drug (J0178) and surgery: eye (67028).
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Where did Dr. Arjun Gaurang Merchant go to medical school?
Dr. Merchant graduated from University of Texas Medical School at Houston in 2020.
What drugs does Dr. Arjun Gaurang Merchant prescribe most?
In 2024 Medicare Part D data, Dr. Merchant's most prescribed drugs by claims were Prednisolone Acetate, Dorzolamide-Timolol and Moxifloxacin.
Has Dr. Arjun Gaurang Merchant received payments from drug or device companies?
CMS Open Payments shows $167 in general payments to Dr. Merchant from 2 companies from 2021 to 2025. The largest total came from Regeneron Pharmaceuticals, Inc.
How long has Dr. Arjun Gaurang Merchant been practicing?
Dr. Merchant graduated from medical school in 2020, 6 years ago.
Does Dr. Arjun Gaurang Merchant do research?
Dmand AI links 2 publications to Dr. Merchant, published from 2015 to 2024.
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