Dr. Ramasamy Swami Nathan, MD
- Medicare services, 2024
- 455
- Medicare patients, 2024
- 287
- Part D claims, 2024
- 13
- Hospital affiliations
- 2
- Industry payments
- $13,151
- Practice address
- 20900 Biscayne Blvd, Aventura, FL 33180
- Practice phone
- Call (305) 682-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Nathan's professional email, personal email and mobile number
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Dr. Ramasamy Swami Nathan is a gastroenterologist in Miami, Florida
Dr. Nathan practices at HCA Florida Aventura Hospital in Aventura, Florida, part of HCA Healthcare.
Dr. Nathan's NPI, 1538114566, was assigned on May 25, 2006. Dr. Nathan graduated from Madurai Medical College in 1981. Dr. Nathan holds Florida license ME146269.
- NPI
- 1538114566NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5698744878
- NPI enumeration date
- May 25, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (305) 682-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ramasamy Swami Nathan practices at HCA Florida Aventura Hospital in Aventura, Florida
Dr. Nathan's primary practice is HCA Florida Aventura Hospital, at 20900 Biscayne Blvd, Aventura, FL 33180 in Miami-Dade County. The practice phone is (305) 682-7000.
- HCA Florida Aventura Hospital20900 Biscayne Blvd, Aventura, FL 33180 · Miami-Dade CountyPhone(305) 682-7000
Source: Dmand AI Affiliation Data
Dr. Ramasamy Swami Nathan is affiliated with 3 sites of care and 1 medical group
Dr. Nathan's primary practice is HCA Florida Aventura Hospital in Aventura, Florida, part of HCA Healthcare. The medical group on file is Aventura Healthcare Specialists. Dmand AI also links Dr. Nathan to 1 more hospital and 1 physician office, 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. Ramasamy Swami Nathan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nathan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| HCA Florida Aventura Hospital | 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. Ramasamy Swami Nathan is one of 1,364 gastroenterologists in Florida
Gastroenterology is Dr. Nathan's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Nathan is board certified in gastroenterology by the American Board of Internal Medicine. Dmand AI has Dr. Nathan's licenses on file in 2 states: Florida and New Jersey.
Specialties and state licenses
- Gastroenterology, FloridaPrimary
- New Jersey license
Gastroenterologists near Dr. Nathan
Counts of gastroenterologists 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. Ramasamy Swami Nathan billed Medicare for 455 services in 2024
CMS data shows 455 Medicare services from Dr. Nathan across 4 procedure codes in 2024, for 287 Medicare patients. Medicare paid $32,749 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Nathan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4832024: 4556%
- Surgery
- 2023: 252024: 0100%
Dr. Nathan compared with the Florida median for gastroenterologists, 2024
- Dr. Nathan
- Florida median
- Medicare services
- 455vs 58222% below
- Medicare patients
- 287vs 32211% below
- Part D claims
- 193vs 50262% below
Medians across 1,320 gastroenterologists in Florida with Dmand AI profiles that report each measure.
Dr. Nathan'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. Ramasamy Swami Nathan treated 287 Medicare patients in 2024, average age 78
CMS counts 287 Medicare patients who saw Dr. Nathan in 2024. The largest group is 75 to 84, with 95 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 46% are also on Medicaid. Their average risk score is 3.30, 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. Nathan's median patient age at 74, with 51% women.
Dr. Nathan's Medicare patients by age, 2024
Dr. Nathan's Medicare patients by sex, 2024
- Women15454%
- Men13346%
Chronic conditions among Dr. Nathan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes60%
- Ischemic heart disease59%
- COPD57%
- Chronic kidney disease57%
- Arthritis56%
- Heart failure52%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nathan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ramasamy Swami Nathan wrote 13 Medicare Part D claims in 2024
In 2024, Dr. Nathan wrote 13 Medicare Part D claims. 100% of them were for generic drugs. They cover 5 drugs, with $3,975 in total drug cost. In 2020, CMS named 551 claims across 14 drugs.
Dr. Nathan's most prescribed drugs by claims, 2021
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, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 5512021: 19365%
Drugs named by CMS: 5 in 2021, 14 in 2020.
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
Dr. Ramasamy Swami Nathan ranks in the 67th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Nathan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 63 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Nathan, more than 67% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Nathan ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 67th percentile63 procedures
- Colonoscopy
- 42nd percentile12 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Ramasamy Swami Nathan received $13,151 in industry payments from 2016 to 2025
CMS Open Payments shows 277 general payments to Dr. Nathan from 31 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 54% of the total. Gilead Sciences, Inc. paid the most, $4,734.
General payments to Dr. Nathan by program year, 2016 to 2025
General payments to Dr. Nathan by kind, 2016 to 2025
- Food and beverage$7,09554%
- Travel and lodging$3,06623%
- Consulting fees$2,71521%
- Gifts$1701%
- Education$1041%
Companies that paid Dr. Nathan 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. Ramasamy Swami Nathan graduated from Madurai Medical College
Dr. Nathan graduated from Madurai Medical College in 1981.
- Medical school
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Ramasamy Swami Nathan accepts plans from 3 insurance carriers
Dr. Nathan is in network with 3 carriers, including Excellus BlueCross BlueShield, Horizon Blue Cross Blue Shield of New Jersey and CMS Medicare. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Excellus BlueCross BlueShield
- Horizon Blue Cross Blue Shield of New Jersey
- CMS Medicare
Plan types Dr. Nathan accepts, by number of carriers
- Medicare3
- HMO2
- POS2
- PPO2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Ramasamy Swami Nathan'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)Doctors and Clinicians Utilization Data (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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Ramasamy Swami Nathan
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. Ramasamy Swami Nathan's NPI number?
Dr. Ramasamy Swami Nathan's NPI number is 1538114566. It was assigned on May 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Ramasamy Swami Nathan?
Dr. Ramasamy Swami Nathan is a gastroenterologist in Miami, Florida. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Ramasamy Swami Nathan practice?
Dr. Nathan practices at 20900 Biscayne Blvd, Aventura, FL 33180. Dr. Nathan's primary practice is HCA Florida Aventura Hospital in Aventura, Florida, part of HCA Healthcare. Dmand AI also links Dr. Nathan to 1 hospital and 1 physician office.
What is Dr. Ramasamy Swami Nathan's office phone number?
The practice phone on file for Dr. Nathan is (305) 682-7000.
What is Dr. Ramasamy Swami Nathan's medical license number?
Dr. Nathan holds Florida license ME146269, one of the licenses on file in 2 states.
Which states has Dr. Ramasamy Swami Nathan been licensed in?
Dmand AI has state licenses on file for Dr. Nathan in Florida (2020 to 2026) and New Jersey (1986 to 2027).
Which hospitals is Dr. Ramasamy Swami Nathan affiliated with?
Dr. Nathan practices at HCA Florida Aventura Hospital in Aventura, Florida. Dmand AI links Dr. Nathan to 1 more hospital.
What medical group is Dr. Ramasamy Swami Nathan part of?
Dr. Nathan is linked to Aventura Healthcare Specialists.
Does Dr. Ramasamy Swami Nathan accept Medicare?
Yes. CMS data shows Dr. Nathan billed Medicare for 455 services in 2024, and Dr. Nathan accepts Medicare assignment.
How many Medicare patients does Dr. Ramasamy Swami Nathan see?
CMS counts 287 Medicare patients who saw Dr. Nathan in 2024, with an average age of 78.
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Is Dr. Ramasamy Swami Nathan board certified?
Yes. Dr. Nathan is board certified in gastroenterology by the American Board of Internal Medicine.
What services does Dr. Ramasamy Swami Nathan bill to Medicare?
In 2024, Dr. Nathan's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99222) and hospital inpatient care (99231).
Where did Dr. Ramasamy Swami Nathan go to medical school?
Dr. Nathan graduated from Madurai Medical College in 1981.
What drugs does Dr. Ramasamy Swami Nathan prescribe most?
In 2021 Medicare Part D data, Dr. Nathan's most prescribed drugs by claims were Famotidine, Omeprazole and Peg 3350-Electrolyte.
Has Dr. Ramasamy Swami Nathan received payments from drug or device companies?
CMS Open Payments shows $13,151 in general payments to Dr. Nathan from 31 companies from 2016 to 2025. The largest total came from Gilead Sciences, Inc.
How long has Dr. Ramasamy Swami Nathan been practicing?
Dr. Nathan graduated from medical school in 1981, 45 years ago.
What insurance does Dr. Ramasamy Swami Nathan accept?
Dr. Nathan is in network with 3 carriers, including Excellus BlueCross BlueShield, Horizon Blue Cross Blue Shield of New Jersey and CMS Medicare. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
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