Dr. Ramesh V. Nathan, MD
- Medicare services, 2024
- 49,771
- Medicare patients, 2024
- 691
- Part D claims, 2024
- 1,908
- Publications
- 11
- Clinical trials
- 5
- Practice address
- 375 E Rolling Oaks Dr, Thousand Oaks, CA 91361
- Practice phone
- Call (805) 777-8956
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Thousand Oaks Surgical Institute, A.M.C
Thousand Oaks, California
Find Dr. Nathan'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. Ramesh V. Nathan is an infectious disease specialist in Thousand Oaks, California
Dr. Nathan practices at Thousand Oaks Surgical Institute, A.M.C in Thousand Oaks, California.
Dr. Nathan's NPI, 1215025291, was assigned on October 11, 2006. Dr. Nathan graduated from George Washington University School of Medicine and Health Sciences in 2000. Dr. Nathan's California license number on file is A77898.
- NPI
- 1215025291NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1951349141
- NPI enumeration date
- October 11, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (805) 777-8956
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ramesh V. Nathan practices at Thousand Oaks Surgical Institute, A.M.C in Thousand Oaks, California
Dr. Nathan's primary practice is Thousand Oaks Surgical Institute, A.M.C, at 375 E Rolling Oaks Dr, Thousand Oaks, CA 91361 in Ventura County. The practice phone is (805) 777-8956.
- Thousand Oaks Surgical Institute, A.M.C375 E Rolling Oaks Dr, Thousand Oaks, CA 91361 · Ventura CountyPhone(805) 777-8956
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ramesh V. Nathan is affiliated with 8 sites of care and 2 medical groups
Dr. Nathan's primary practice is Thousand Oaks Surgical Institute, A.M.C in Thousand Oaks, California. Dr. Nathan is also affiliated with Los Robles Regional Medical Center. The medical group on file is Mazur Statner And Dutta Medical Group. Dmand AI also links Dr. Nathan to 2 more hospitals, 3 home health agencies, 1 group practice or clinic and 1 medical group, each 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. Ramesh V. Nathan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nathan practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Thousand Oaks Surgical Institute, A.M.C | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ramesh V. Nathan is one of 1,054 infectious disease specialists in California
Infectious disease is Dr. Nathan's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Nathan is board certified in infectious disease by the American Board of Internal Medicine. Dr. Nathan has a license on file in California.
Specialties and state licenses
- Infectious disease, CaliforniaPrimary
Clinical focus
Dmand AI lists acute skin infection, facial skin infection, immune deficiency disease, joint or bone infection, pneumonia, shingles and UTI among the conditions Dr. Nathan treats.
Infectious disease specialists near Dr. Nathan
Counts of infectious disease specialists 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. Ramesh V. Nathan billed Medicare for 49,771 services in 2024
CMS data shows 49,771 Medicare services from Dr. Nathan across 17 procedure codes in 2024, for 691 Medicare patients. Medicare paid $264,980 for them.
Dr. Nathan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 02024: 46,844
- Office and hospital visits
- 2023: 2,7252024: 2,40712%
- Tests and treatments
- 2023: 722024: 409468%
- Other services
- 2023: 1002024: 8515%
- Surgery
- 2023: 02024: 26
- Lab and pathology
- 2023: 172024: 0100%
Where Dr. Nathan's Medicare services took place, 2024
- In an office47,86396%
- In a facility1,9084%
Dr. Nathan compared with the California median for infectious disease specialists, 2024
- Dr. Nathan
- California median
- Medicare services
- 49,771vs 429116.0 times
- Medicare patients
- 691vs 1803.8 times
- Part D claims
- 1,588vs 11913.3 times
Medians across 930 infectious disease specialists in California 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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nathan and other infectious disease specialists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ramesh V. Nathan treated 691 Medicare patients in 2024, average age 76
CMS counts 691 Medicare patients who saw Dr. Nathan in 2024. The largest group is 65 to 74, with 260 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 2.33, 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 70, with 47% women.
Dr. Nathan's Medicare patients by age, 2024
Dr. Nathan's Medicare patients by sex, 2024
- Women35952%
- Men33248%
Chronic conditions among Dr. Nathan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis59%
- Ischemic heart disease47%
- Diabetes40%
- Chronic kidney disease39%
- Heart failure39%
- Mood disorders38%
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 70
Patient panel by sex, all payers
- Women47%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ramesh V. Nathan wrote 1,908 Medicare Part D claims in 2024
In 2024, Dr. Nathan wrote 1,908 Medicare Part D claims for 214 patients. 87% of them were for generic drugs. CMS names the drug for 1,588 of them, across 68 drugs with 11 or more claims each, at $145,693 in total drug cost. In 2023, CMS named 1,662 claims across 67 drugs.
Dr. Nathan's Part D claims by kind of drug, 2024
- Generic1,666 claims87%
- Brand-name and other242 claims13%
Dr. Nathan'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. Nathan's Part D claims, 2024
- Opioids1%19 of 1,908 claims
- Antibiotics17%326 of 1,908 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: 1,6622024: 1,5884%
Drugs named by CMS: 68 in 2024, 67 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. Ramesh V. Nathan scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Nathan for performance year 2024, reported individually. Dr. Nathan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Nathan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- MIPS final score, 2024
- 75 of 100
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Ramesh V. Nathan has 11 publications on record
Dmand AI links 11 papers to Dr. Nathan, published from 2020 to 2022. 2020 was the busiest year, with 3. Dr. Nathan's most frequent co-authors are Richard Lowell Hengel, MD, Timothy E. Ritter, MD and John Richard Dingilian, MD.
Dr. Nathan's papers by year, 2020 to 2022
Dr. Nathan's most frequent co-authors
- Richard Lowell Hengel, MD3 shared papers
- Timothy E. Ritter, MD3 shared papers
- John Richard Dingilian, MD2 shared papers
Recent publications by Dr. Nathan
See who Dr. Nathan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Nathan works with, so you can find a warm path to the right infectious disease specialists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Ramesh V. Nathan has worked on 5 clinical trials
Dmand AI links Dr. Nathan to 5 clinical trials. 1 is still active or recruiting. Conditions studied include COVID-19, Pneumonia, Viral and Alzheimer Disease. Eli Lilly and Company sponsors the most, 3. Open Payments lists research payments to Dr. Nathan that name 3 trials.
Clinical trials with Dr. Nathan by phase
- NonePhase 1: no trials
- NonePhase 2: no trials
- 1Phase 2/3: 1 trial
- NonePhase 3: no trials
- 1Phase 4: 1 trial
Conditions in Dr. Nathan's trials
- COVID-19
- Pneumonia, Viral
- Alzheimer Disease
- Severe Acute Respiratory Syndrome
- Tauopathies
Investigators on the most trials with Dr. Nathan
- Masoud M. Azizad, MD3 shared trials
- Dwight D. Blake, MD3 shared trials
- Joseph A. Boscia, MD3 shared trials
Recent clinical trials with Dr. Nathan
Accelerating COVID-19 Therapeutic Interventions and Vaccines 4 ACUTE (opens in a new tab)
ACTIV-2: A Study for Outpatients With COVID-19 (opens in a new tab)
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Ramesh V. Nathan received $70,221 in industry payments from 2016 to 2025
CMS Open Payments shows 241 general payments to Dr. Nathan from 29 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 53% of the total. Merck Sharp & Dohme Corporation paid the most, $26,338. It also lists 5 research payments totaling $270,675 from 2020 to 2022, naming 3 clinical trials.
General payments to Dr. Nathan by program year, 2016 to 2025
General payments to Dr. Nathan by kind, 2016 to 2025
- Speaker and faculty fees$37,12053%
- Honoraria$13,35419%
- Travel and lodging$12,68818%
- Food and beverage$5,2537%
- Other$1,7563%
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. Ramesh V. Nathan has 13 awards and honors on record
Dmand AI lists 13 awards for Dr. Nathan, most recently Faculty Teaching Award in 2023. Dr. Nathan serves on Antimicrobial Management Program.
Awards and honors for Dr. Nathan
- 2023
- Faculty Teaching Award
- 2022
- Sub specialty Faculty Teaching Award
- 2015
- Fellow
- 2003
- Solomon Scholars Research Award
- 1999
- Class Curriculum Representative Commendation
- 1996
- University Honors Program
Dr. Nathan's committees and leadership roles
- Antimicrobial Management ProgramCo-Director
- 2012 to present
- Medical Executive CommitteeChief of Staff
- 2013 to 2015
Source: Dmand AI Professional Profile Data
Dr. Ramesh V. Nathan graduated from George Washington University School of Medicine and Health Sciences
Dr. Nathan graduated from George Washington University School of Medicine and Health Sciences in 2000. Dr. Nathan is a member of IDSA.
- Medical school
- Board certified in infectious disease
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Ramesh V. Nathan accepts plans from 11 insurance carriers
Dr. Nathan is in network with 11 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Humana
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- +3 more carriersWith a free account
Plan types Dr. Nathan accepts, by number of carriers
- Medicare9
- PPO9
- HMO6
- POS4
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Ramesh V. 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 | 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)Clinician Public Reporting: Overall MIPS Performance (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 |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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. Ramesh V. 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. Ramesh V. Nathan's NPI number?
Dr. Ramesh V. Nathan's NPI number is 1215025291. It was assigned on October 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Ramesh V. Nathan?
Dr. Ramesh V. Nathan is an infectious disease specialist in Thousand Oaks, California. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. Ramesh V. Nathan practice?
Dr. Nathan practices at 375 E Rolling Oaks Dr, Thousand Oaks, CA 91361. Dr. Nathan's primary practice is Thousand Oaks Surgical Institute, A.M.C in Thousand Oaks, California. Dmand AI also links Dr. Nathan to 2 hospitals, 3 home health agencies, 1 group practice or clinic and 1 medical group.
What is Dr. Ramesh V. Nathan's office phone number?
The practice phone on file for Dr. Nathan is (805) 777-8956.
What is Dr. Ramesh V. Nathan's medical license number?
Dr. Nathan's California license number on file is A77898.
Which hospitals is Dr. Ramesh V. Nathan affiliated with?
Dr. Nathan is affiliated with Los Robles Regional Medical Center. Dmand AI links Dr. Nathan to 2 more hospitals.
What medical group is Dr. Ramesh V. Nathan part of?
Dr. Nathan is linked to Mazur Statner And Dutta Medical Group. Dmand AI links Dr. Nathan to 1 more medical group.
Does Dr. Ramesh V. Nathan accept Medicare?
Yes. CMS data shows Dr. Nathan billed Medicare for 49,771 services in 2024, and Dr. Nathan accepts Medicare assignment.
Does Dr. Ramesh V. Nathan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Nathan as offering telehealth services.
What is Dr. Ramesh V. Nathan's MIPS score?
Dr. Nathan's MIPS final score for performance year 2024 is 75 out of 100, reported individually.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Ramesh V. Nathan see?
CMS counts 691 Medicare patients who saw Dr. Nathan in 2024, with an average age of 76.
Is Dr. Ramesh V. Nathan board certified?
Yes. Dr. Nathan is board certified in infectious disease by the American Board of Internal Medicine.
What services does Dr. Ramesh V. Nathan bill to Medicare?
In 2024, Dr. Nathan's most billed Medicare services were injected or infused drug (J0878), hospital inpatient care (99233) and injected or infused drug (J0696).
Where did Dr. Ramesh V. Nathan go to medical school?
Dr. Nathan graduated from George Washington University School of Medicine and Health Sciences in 2000.
What drugs does Dr. Ramesh V. Nathan prescribe most?
In 2024 Medicare Part D data, Dr. Nathan's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Amlodipine Besylate.
Has Dr. Ramesh V. Nathan received payments from drug or device companies?
CMS Open Payments shows $70,221 in general payments to Dr. Nathan from 29 companies from 2016 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Ramesh V. Nathan been practicing?
Dr. Nathan graduated from medical school in 2000, 26 years ago.
Does Dr. Ramesh V. Nathan do research?
Dmand AI links 11 publications to Dr. Nathan, published from 2020 to 2022. Dr. Nathan has worked on 5 clinical trials.
Who does Dr. Ramesh V. Nathan publish with?
Dr. Nathan's most frequent co-authors are Richard Lowell Hengel, MD (3 shared papers), Timothy E. Ritter, MD (3 shared papers) and John Richard Dingilian, MD (2 shared papers).
What insurance does Dr. Ramesh V. Nathan accept?
Dr. Nathan is in network with 11 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.
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