Dr. Ravindrakumar G. Guruswamy, MD, MPH
- Medicare services, 2024
- 689
- Medicare patients, 2024
- 155
- Part D claims, 2024
- 219
- Hospital affiliations
- 2
- Industry payments
- $390
- Practice address
- 1500 Duarte Rd, Duarte, CA 91010
- Practice phone
- Call (800) 826-4673
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
City of Hope Comprehensive Cancer Center - Duarte
Duarte, California
Find Dr. Guruswamy's professional email, personal email and mobile number
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Dr. Ravindrakumar G. Guruswamy is a hospitalist in Duarte, California
Dr. Guruswamy practices at City of Hope Comprehensive Cancer Center - Duarte in Duarte, California.
Dr. Guruswamy's NPI, 1063694917, was assigned on December 3, 2007. Dr. Guruswamy holds California license C55765.
- NPI
- 1063694917NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739252073
- NPI enumeration date
- December 3, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (800) 826-4673
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ravindrakumar G. Guruswamy practices at City of Hope Comprehensive Cancer Center - Duarte in Duarte, California
Dr. Guruswamy's primary practice is City of Hope Comprehensive Cancer Center - Duarte, at 1500 Duarte Rd, Duarte, CA 91010 in Los Angeles County. The practice phone is (800) 826-4673.
- City of Hope Comprehensive Cancer Center - Duarte1500 Duarte Rd, Duarte, CA 91010 · Los Angeles CountyPhone(800) 826-4673
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ravindrakumar G. Guruswamy is affiliated with 4 sites of care and 3 medical groups
Dr. Guruswamy's primary practice is City of Hope Comprehensive Cancer Center - Duarte in Duarte, California. Dr. Guruswamy is also affiliated with Huntington Hospital. The medical group on file is Optum - Downtown Los Angeles. Dmand AI also links Dr. Guruswamy to 1 more hospital, 2 medical groups and 1 other site, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ravindrakumar G. Guruswamy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Guruswamy practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| City of Hope Comprehensive Cancer Center - Duarte | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ravindrakumar G. Guruswamy is one of 3,186 hospitalists in California
Hospitalist is Dr. Guruswamy's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Guruswamy is licensed in California.
Specialties and state licenses
- Hospitalist, CaliforniaPrimary
Hospitalists near Dr. Guruswamy
Counts of hospitalists 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. Ravindrakumar G. Guruswamy billed Medicare for 689 services in 2024
CMS data shows 689 Medicare services from Dr. Guruswamy across 3 procedure codes in 2024, for 155 Medicare patients. Medicare paid $51,196 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Guruswamy's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7752024: 68911%
Dr. Guruswamy compared with the California median for hospitalists, 2024
- Dr. Guruswamy
- California median
- Medicare services
- 689vs 43060% above
- Medicare patients
- 155vs 20123% below
- Part D claims
- 56vs 6919% below
Medians across 2,991 hospitalists in California with Dmand AI profiles that report each measure.
Dr. Guruswamy'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. Ravindrakumar G. Guruswamy treated 155 Medicare patients in 2024, average age 71
CMS counts 155 Medicare patients who saw Dr. Guruswamy in 2024. The largest group is 65 to 74, with 78 patients. 75% of them have high blood pressure, and 70% have high cholesterol. 50% are also on Medicaid. Their average risk score is 3.55, 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. Guruswamy's median patient age at 65, with 49% women.
Dr. Guruswamy's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Guruswamy's Medicare patients by sex, 2024
- Women7750%
- Men7850%
Chronic conditions among Dr. Guruswamy's Medicare patients, 2024
- High blood pressure75%
- High cholesterol70%
- Cancer68%
- Arthritis48%
- Diabetes47%
- Chronic kidney disease41%
- Ischemic heart disease37%
- Mood disorders32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Guruswamy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women49%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ravindrakumar G. Guruswamy wrote 219 Medicare Part D claims in 2024
In 2024, Dr. Guruswamy wrote 219 Medicare Part D claims for 80 patients. 89% of them were for generic drugs. CMS names the drug for 56 of them, across 4 drugs with 11 or more claims each, at $298 in total drug cost. In 2023, CMS named 62 claims across 3 drugs.
Dr. Guruswamy's Part D claims by kind of drug, 2024
- Generic196 claims89%
- Brand-name23 claims11%
Dr. Guruswamy'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. Guruswamy's Part D claims, 2024
- Opioids13%28 of 219 claims
- Antibiotics26%58 of 219 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: 622024: 5610%
Drugs named by CMS: 4 in 2024, 3 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. Ravindrakumar G. Guruswamy takes part in Medicare
Dr. Guruswamy 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. Ravindrakumar G. Guruswamy received $390 in industry payments from 2017 to 2022
CMS Open Payments shows 8 general payments to Dr. Guruswamy from 5 drug and device companies from 2017 to 2022. Food and beverage make up the largest share, 100% of the total. ZOLL Services LLC (A/K/A ZOLL LifeCor Corp) paid the most, $171.
General payments to Dr. Guruswamy by program year, 2017 to 2022
Companies that paid Dr. Guruswamy the most, 2017 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Ravindrakumar G. Guruswamy'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 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Ravindrakumar G. Guruswamy
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. Ravindrakumar G. Guruswamy's NPI number?
Dr. Ravindrakumar G. Guruswamy's NPI number is 1063694917. It was assigned on December 3, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Ravindrakumar G. Guruswamy?
Dr. Ravindrakumar G. Guruswamy is a hospitalist in Duarte, California. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Ravindrakumar G. Guruswamy practice?
Dr. Guruswamy practices at 1500 Duarte Rd, Duarte, CA 91010. Dr. Guruswamy's primary practice is City of Hope Comprehensive Cancer Center - Duarte in Duarte, California. Dmand AI also links Dr. Guruswamy to 1 hospital, 2 medical groups and 1 other site.
What is Dr. Ravindrakumar G. Guruswamy's office phone number?
The practice phone on file for Dr. Guruswamy is (800) 826-4673.
What is Dr. Ravindrakumar G. Guruswamy's medical license number?
Dr. Guruswamy holds California license C55765.
Which hospitals is Dr. Ravindrakumar G. Guruswamy affiliated with?
Dr. Guruswamy is affiliated with Huntington Hospital. Dmand AI links Dr. Guruswamy to 1 more hospital.
What medical group is Dr. Ravindrakumar G. Guruswamy part of?
Dr. Guruswamy is linked to Optum - Downtown Los Angeles. Dmand AI links Dr. Guruswamy to 2 more medical groups.
Does Dr. Ravindrakumar G. Guruswamy accept Medicare?
Yes. CMS data shows Dr. Guruswamy billed Medicare for 689 services in 2024, and Dr. Guruswamy accepts Medicare assignment.
How many Medicare patients does Dr. Ravindrakumar G. Guruswamy see?
CMS counts 155 Medicare patients who saw Dr. Guruswamy in 2024, with an average age of 71.
What services does Dr. Ravindrakumar G. Guruswamy bill to Medicare?
In 2024, Dr. Guruswamy's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99239) and hospital inpatient care (99233).
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What drugs does Dr. Ravindrakumar G. Guruswamy prescribe most?
In 2024 Medicare Part D data, Dr. Guruswamy's most prescribed drugs by claims were Pantoprazole Sodium, Levofloxacin and Sulfamethoxazole-Trimethoprim.
Has Dr. Ravindrakumar G. Guruswamy received payments from drug or device companies?
CMS Open Payments shows $390 in general payments to Dr. Guruswamy from 5 companies from 2017 to 2022. The largest total came from ZOLL Services LLC (A/K/A ZOLL LifeCor Corp).
How long has Dr. Ravindrakumar G. Guruswamy been practicing?
Dr. Guruswamy graduated from medical school in 1999, 27 years ago.
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