Geriatric Medicine Doctors (Internal Medicine) in Nevada
Data updated monthly · Last refresh October 2026
34 Geriatric Medicine (Internal Medicine) providers practice in Nevada, including 7 (21%) offering telehealth. The largest concentration is in Las Vegas. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
34providers
7telehealth
Las Vegastop city
Geriatric Medicine (Internal Medicine) by city in Nevada
Choose a city to see providers there.
Where Geriatric Medicine Doctors (Internal Medicine) in Nevada practice
From CMS Medicare enrollment records covering 17 of the 34 providers listed here (50%). Providers who do not bill Medicare are not included in these figures.
47%solo or small practice (under 10 clinicians)
35%mid-size group (10 to 99)
18%large group or health system (100+)
Largest practice groups
| Group (as registered with Medicare) | Geriatric Medicine Doctors (Internal Medicine) | All clinicians in group | Main city |
| Eid Nevada Critical Care PLLC | 3 | 62 | Las Vegas |
Hospitals where they hold privileges
| Hospital | City | Ownership | CMS star rating | Geriatric Medicine Doctors (Internal Medicine) affiliated |
| Renown Regional Medical Center | Reno | Nonprofit | 3 of 5 | 5 |
| Renown South Meadows Medical Center | Reno | Nonprofit | 3 of 5 | 4 |
| Sunrise Hospital and Medical Center | Las Vegas | For-profit | 2 of 5 | 4 |
| Northern Nevada Medical Center | Sparks | Nonprofit | 3 of 5 | 3 |
| Mountainview Hospital | Las Vegas | For-profit | 4 of 5 | 3 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Geriatric Medicine (Internal Medicine) providers in Nevada
Listed by city, largest first. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.
Dr. Glenn Thorp, MDGardnerville, NV · $71 in drug and device payments (2025) ·
(775) 782-1550 Dr. Aurelio Muyot, MDHenderson, NV · No drug or device payments recorded (2025) ·
(702) 777-4809 Dr. Syed Rahman, M.D.Henderson, NV · $82 in drug and device payments (2025) ·
(702) 914-7150 Dr. Upinder Singh, M.D.Henderson, NV · $499 in drug and device payments (2025) ·
(702) 407-8241 Dr. Ajay Nellutla, M.D.Las Vegas, NV · $40 in drug and device payments (2025) ·
(702) 649-8009 Dr. Clarence Grim, M.D.Las Vegas, NV · No drug or device payments recorded (2025) ·
(414) 916-0841 Dr. Ji Yoo, M.D.Las Vegas, NV · $24 in drug and device payments (2025) · Telehealth ·
(702) 671-5060 Dr. Leonardo Gan-lim, M.D.Las Vegas, NV · $687 in drug and device payments (2025) · Telehealth ·
(702) 805-2435 Dr. Mark Zimmerman, M.D.Las Vegas, NV · No drug or device payments recorded (2025) ·
(702) 489-5120 Dr. May Khin, MDLas Vegas, NV · No drug or device payments recorded (2025) ·
(702) 671-6437 Dr. Mike Jeong, DOLas Vegas, NV · No drug or device payments recorded (2025) ·
(702) 304-2144 Dr. Orania Tigaieru, M.D.Las Vegas, NV · No drug or device payments recorded (2025) ·
(702) 791-9000 Dr. Pengfeng Jin, MDLas Vegas, NV · No drug or device payments recorded (2025) ·
(725) 325-4848 Dr. Roland Jayson Pua, MDLas Vegas, NV · $43 in drug and device payments (2025) ·
(702) 638-7705 Dr. Shanna Marie Baltar, DOLas Vegas, NV · No drug or device payments recorded (2025) ·
(702) 877-8600 Dr. Shawn Mcgivney, M.D.Las Vegas, NV · No drug or device payments recorded (2025) ·
(775) 828-9435 Dr. Sophie Chwa, M.D.Las Vegas, NV · No drug or device payments recorded (2025) ·
(626) 864-9105 Dr. Syed Hussain, MDLas Vegas, NV · $158 in drug and device payments (2025) · Telehealth ·
(702) 734-4377 Dr. Vincent Chu, MDLas Vegas, NV · No drug or device payments recorded (2025) ·
(702) 791-9040 Dr. Iulia IoanitoaiaNorth Las Vegas, NV · No drug or device payments recorded (2025) ·
(702) 791-9000 Dr. Kelly Conright, MDNorth Las Vegas, NV · No drug or device payments recorded (2025) ·
(702) 791-9037 Dr. Michael Brigoli, MDNorth Las Vegas, NV · No drug or device payments recorded (2025) ·
(702) 791-9000 Dr. Ronald TanNorth Las Vegas, NV · No drug or device payments recorded (2025) ·
(702) 791-9000 Dr. Barnali Gupta, M.D.Reno, NV · No drug or device payments recorded (2025) · Telehealth ·
(775) 786-4200 Dr. Calvin Vanreken, MDReno, NV · $1,660 in drug and device payments (2025) · Telehealth ·
(775) 358-1717 Dr. Jeffrey Gingold, M.D.Reno, NV · No drug or device payments recorded (2025) ·
(775) 747-9145 Dr. Jennifer Hagen, MDReno, NV · No drug or device payments recorded (2025) ·
(775) 327-5000 Dr. Katherine Thyssen, DOReno, NV · No drug or device payments recorded (2025) ·
(775) 982-5000 Dr. Mel Magboo, M.D.Reno, NV · $231 in drug and device payments (2025) · Telehealth ·
(775) 398-1981 Dr. Mordechai Lavi, M.D.Reno, NV · No drug or device payments recorded (2025) ·
(775) 327-5000 Dr. Neila Shumaker, M.D.Reno, NV · No drug or device payments recorded (2025) ·
(775) 334-4120 Dr. Steven Phillips, M.D.Reno, NV · No drug or device payments recorded (2025) ·
(775) 398-1981 Dr. Denver Miller, MD, MPH, CMDSparks, NV · $609 in drug and device payments (2025) · Telehealth ·
(775) 352-5335 Common questions
How many Geriatric Medicine (Internal Medicine) providers are in Nevada?There are 34 Geriatric Medicine (Internal Medicine) providers with active NPI records practicing in Nevada, according to federal NPPES data refreshed monthly.
Do Geriatric Medicine (Internal Medicine) providers in Nevada offer telehealth?Yes. 7 of the 34 Geriatric Medicine (Internal Medicine) providers in Nevada (about 21%) report offering telehealth services in CMS data.
Which cities in Nevada have the most Geriatric Medicine (Internal Medicine) providers?Las Vegas (15), Reno (10), North Las Vegas (4) have the highest concentration of Geriatric Medicine (Internal Medicine) providers in Nevada.
How many Geriatric Medicine (Internal Medicine) providers in Nevada received drug or device company payments?12 of 34 Geriatric Medicine (Internal Medicine) providers in Nevada (35%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
Where does this data come from?Provider counts and profiles come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
Do most Geriatric Medicine Doctors (Internal Medicine) in Nevada work in independent practices or large health systems?Among 17 Geriatric Medicine Doctors (Internal Medicine) in Nevada enrolled in Medicare, 47% bill through a solo or small practice with fewer than 10 clinicians, 35% through a mid-size group of 10 to 99, and 18% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
Which hospitals do Geriatric Medicine Doctors (Internal Medicine) in Nevada work at?According to CMS facility affiliation records, the Nevada hospitals where the most Geriatric Medicine Doctors (Internal Medicine) hold privileges are Renown Regional Medical Center in Reno; Renown South Meadows Medical Center in Reno; Sunrise Hospital and Medical Center in Las Vegas.
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