Dr. Ratnasabapathy Sivasekaran, MD
- Medicare services, 2024
- 23,902
- Medicare patients, 2024
- 1,874
- Part D claims, 2024
- 15,717
- Hospital affiliations
- 8
- Industry payments
- $6,222
- Practice address
- 1431 SW 1st Ave, Ocala, FL 34471
- Practice phone
- Call (352) 401-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Sivasekaran'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. Ratnasabapathy Sivasekaran is an internist in Ocala, Florida
Dr. Sivasekaran practices at HCA Florida Ocala Hospital in Ocala, Florida, part of HCA Healthcare.
Dr. Sivasekaran's NPI, 1114954476, was assigned on June 26, 2006. Dr. Sivasekaran graduated from St. George's University School of Medicine in 2001. Dr. Sivasekaran holds Florida license ME90344.
- NPI
- 1114954476NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0547237828
- NPI enumeration date
- June 26, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (352) 401-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ratnasabapathy Sivasekaran practices at HCA Florida Ocala Hospital in Ocala, Florida
Dr. Sivasekaran's primary practice is HCA Florida Ocala Hospital, at 1431 SW 1st Ave, Ocala, FL 34471 in Marion County. The practice phone is (352) 401-1000.
- HCA Florida Ocala Hospital1431 SW 1st Ave, Ocala, FL 34471 · Marion CountyPhone(352) 401-1000
Source: Dmand AI Affiliation Data
Dr. Ratnasabapathy Sivasekaran is affiliated with 21 sites of care and 4 medical groups
Dr. Sivasekaran's primary practice is HCA Florida Ocala Hospital in Ocala, Florida, part of HCA Healthcare. Dr. Sivasekaran is also affiliated with AdventHealth Ocala. The medical group on file is Siva M.D. P.A. Dmand AI also links Dr. Sivasekaran to 6 more hospitals, 5 skilled nursing facilities, 4 group practices and clinics, 3 home health agencies, 3 medical groups 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. Ratnasabapathy Sivasekaran's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sivasekaran practices, 21 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| HCA Florida Ocala Hospital | Available with a free account |
| +20 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ratnasabapathy Sivasekaran is one of 9,009 internists in Florida
Internal medicine is Dr. Sivasekaran's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Sivasekaran is board certified in internal medicine by the American Board of Internal Medicine. Dr. Sivasekaran is licensed in Florida.
Specialties and state licenses
- Internal medicine, FloridaPrimary
Clinical focus
Dmand AI lists acid reflux, acute diabetes, acute kidney failure, acute respiratory failure, acute sinusitis, acute skin infection, acute stomach ulcer and anemia among the conditions Dr. Sivasekaran treats.
Internists near Dr. Sivasekaran
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. Ratnasabapathy Sivasekaran billed Medicare for 23,902 services in 2024
CMS data shows 23,902 Medicare services from Dr. Sivasekaran across 68 procedure codes in 2024, for 1,874 Medicare patients. Medicare paid $988,622 for them.
Dr. Sivasekaran's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 14,7902024: 13,5319%
- Office and hospital visits
- 2023: 9,5552024: 7,82018%
- Tests and treatments
- 2023: 1,2332024: 1,05614%
- Surgery
- 2023: 6342024: 6123%
- Drugs given in the office
- 2023: 4972024: 4921%
- Other services
- 2023: 3472024: 39113%
Where Dr. Sivasekaran's Medicare services took place, 2024
- In an office17,66874%
- In a facility6,23426%
Dr. Sivasekaran compared with the Florida median for internists, 2024
- Dr. Sivasekaran
- Florida median
- Medicare services
- 23,902vs 55543.1 times
- Medicare patients
- 1,874vs 2158.7 times
- Part D claims
- 14,664vs 46631.5 times
Medians across 8,488 internists in Florida with Dmand AI profiles that report each measure.
Dr. Sivasekaran'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. Ratnasabapathy Sivasekaran treated 1,874 Medicare patients in 2024, average age 77
CMS counts 1,874 Medicare patients who saw Dr. Sivasekaran in 2024. The largest group is 75 to 84, with 771 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 2.14, 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. Sivasekaran's median patient age at 75, with 55% women.
Dr. Sivasekaran's Medicare patients by age, 2024
Dr. Sivasekaran's Medicare patients by sex, 2024
- Women1,09158%
- Men78342%
Chronic conditions among Dr. Sivasekaran's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis67%
- Ischemic heart disease56%
- Diabetes47%
- Mood disorders45%
- Chronic kidney disease43%
- Depression42%
Share of Medicare patients with each condition. A patient can have several.
Dr. Sivasekaran's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ratnasabapathy Sivasekaran wrote 15,717 Medicare Part D claims in 2024
In 2024, Dr. Sivasekaran wrote 15,717 Medicare Part D claims for 588 patients. 84% of them were for generic drugs. CMS names the drug for 14,664 of them, across 215 drugs with 11 or more claims each, at $1,357,221 in total drug cost. In 2023, CMS named 16,975 claims across 224 drugs.
Dr. Sivasekaran's Part D claims by kind of drug, 2024
- Generic13,225 claims84%
- Brand-name2,449 claims16%
- Other43 claims0%
Dr. Sivasekaran'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. Sivasekaran's Part D claims, 2024
- Opioids9%1,408 of 15,717 claims
- Antibiotics4%556 of 15,717 claims
- Antipsychotics, patients 65 and over0%70 of 15,717 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: 16,9752024: 14,66414%
Drugs named by CMS: 215 in 2024, 224 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
Dr. Ratnasabapathy Sivasekaran offers telehealth to Medicare patients
Dr. Sivasekaran accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Sivasekaran as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Melanoma (skin cancer) excision: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Ratnasabapathy Sivasekaran received $6,222 in industry payments from 2016 to 2025
CMS Open Payments shows 285 general payments to Dr. Sivasekaran from 54 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. Janssen Pharmaceuticals, Inc paid the most, $556.
General payments to Dr. Sivasekaran by program year, 2016 to 2025
General payments to Dr. Sivasekaran by kind, 2016 to 2025
- Food and beverage$5,98996%
- Education$2334%
Companies that paid Dr. Sivasekaran 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. Ratnasabapathy Sivasekaran has 1 award and honors on record
Dmand AI lists 1 award for Dr. Sivasekaran, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Sivasekaran
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Ratnasabapathy Sivasekaran graduated from St. George's University School of Medicine
Dr. Sivasekaran graduated from St. George's University School of Medicine in 2001.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Ratnasabapathy Sivasekaran accepts plans from 8 insurance carriers
Dr. Sivasekaran is in network with 8 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. HMO plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Excellus BlueCross BlueShield
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
- Pacific Source Health Plans
Plan types Dr. Sivasekaran accepts, by number of carriers
- HMO5
- Medicare5
- POS5
- PPO5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Ratnasabapathy Sivasekaran'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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Ratnasabapathy Sivasekaran
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. Ratnasabapathy Sivasekaran's NPI number?
Dr. Ratnasabapathy Sivasekaran's NPI number is 1114954476. It was assigned on June 26, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Ratnasabapathy Sivasekaran?
Dr. Ratnasabapathy Sivasekaran is an internist in Ocala, Florida. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Ratnasabapathy Sivasekaran practice?
Dr. Sivasekaran practices at 1431 SW 1st Ave, Ocala, FL 34471. Dr. Sivasekaran's primary practice is HCA Florida Ocala Hospital in Ocala, Florida, part of HCA Healthcare. Dmand AI also links Dr. Sivasekaran to 6 hospitals, 5 skilled nursing facilities, 4 group practices and clinics, 3 home health agencies, 3 medical groups and 1 hospice.
What is Dr. Ratnasabapathy Sivasekaran's office phone number?
The practice phone on file for Dr. Sivasekaran is (352) 401-1000.
What is Dr. Ratnasabapathy Sivasekaran's medical license number?
Dr. Sivasekaran holds Florida license ME90344.
Which hospitals is Dr. Ratnasabapathy Sivasekaran affiliated with?
Dr. Sivasekaran practices at HCA Florida Ocala Hospital in Ocala, Florida. Dr. Sivasekaran is also affiliated with AdventHealth Ocala. Dmand AI links Dr. Sivasekaran to 6 more hospitals.
What medical group is Dr. Ratnasabapathy Sivasekaran part of?
Dr. Sivasekaran is linked to Siva M.D. P.A. Dmand AI links Dr. Sivasekaran to 3 more medical groups.
Does Dr. Ratnasabapathy Sivasekaran accept Medicare?
Yes. CMS data shows Dr. Sivasekaran billed Medicare for 23,902 services in 2024, and Dr. Sivasekaran accepts Medicare assignment.
Does Dr. Ratnasabapathy Sivasekaran offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Sivasekaran as offering telehealth services.
How many Medicare patients does Dr. Ratnasabapathy Sivasekaran see?
CMS counts 1,874 Medicare patients who saw Dr. Sivasekaran in 2024, with an average age of 77.
Show 7 more questionsShow fewer questions
Is Dr. Ratnasabapathy Sivasekaran board certified?
Yes. Dr. Sivasekaran is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Ratnasabapathy Sivasekaran bill to Medicare?
In 2024, Dr. Sivasekaran's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99223) and lab and pathology test (82172).
Where did Dr. Ratnasabapathy Sivasekaran go to medical school?
Dr. Sivasekaran graduated from St. George's University School of Medicine in 2001.
What drugs does Dr. Ratnasabapathy Sivasekaran prescribe most?
In 2024 Medicare Part D data, Dr. Sivasekaran's most prescribed drugs by claims were Oxycodone-Acetaminophen, Atorvastatin Calcium and Gabapentin.
Has Dr. Ratnasabapathy Sivasekaran received payments from drug or device companies?
CMS Open Payments shows $6,222 in general payments to Dr. Sivasekaran from 54 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Ratnasabapathy Sivasekaran been practicing?
Dr. Sivasekaran graduated from medical school in 2001, 25 years ago.
What insurance does Dr. Ratnasabapathy Sivasekaran accept?
Dr. Sivasekaran is in network with 8 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. HMO plans come from the most carriers, 5. Check the plan with the practice before a visit.
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