Dr. Thomas Seiji Umemoto, MD
- Medicare services, 2024
- 559
- Medicare patients, 2024
- 324
- Part D claims, 2024
- 99
- MIPS score, 2024
- 97
- Hospital affiliations
- 2
- Practice address
- 1798 N Garey Ave, Pomona, CA 91767
- Practice phone
- Call (909) 865-9500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Umemoto's professional email, personal email and mobile number
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Dr. Thomas Seiji Umemoto is an emergency medicine physician in Pomona, California
Dr. Umemoto practices at Pomona Valley Hospital Medical Center in Pomona, California, part of Pomona Valley Hospital Medical Center.
Dr. Umemoto's NPI, 1477503845, was assigned on May 10, 2006. Dr. Umemoto graduated from New York Medical College in 1999. Dr. Umemoto holds Arizona license 35259.
- NPI
- 1477503845NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6507830759
- NPI enumeration date
- May 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 865-9500
- 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 Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas Seiji Umemoto practices at Pomona Valley Hospital Medical Center in Pomona, California
Dr. Umemoto's primary practice is Pomona Valley Hospital Medical Center, at 1798 N Garey Ave, Pomona, CA 91767 in Los Angeles County. The practice phone is (909) 865-9500.
- Pomona Valley Hospital Medical Center1798 N Garey Ave, Pomona, CA 91767 · Los Angeles CountyPhone(909) 865-9500
Source: Dmand AI Affiliation Data
Dr. Thomas Seiji Umemoto is affiliated with 2 sites of care and 1 medical group
Dr. Umemoto's primary practice is Pomona Valley Hospital Medical Center in Pomona, California, part of Pomona Valley Hospital Medical Center. Dr. Umemoto is also affiliated with Banner Boswell Medical Center. The medical group on file is Vituity.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thomas Seiji Umemoto's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Umemoto practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Pomona Valley Hospital Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Pomona Valley Hospital Medical Center and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Thomas Seiji Umemoto is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Umemoto's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Umemoto's licenses on file in 2 states: Arizona and California.
Specialties and state licenses
- Emergency medicine, ArizonaPrimary
- California license
Emergency medicine physicians near Dr. Umemoto
Counts of emergency medicine physicians 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. Thomas Seiji Umemoto billed Medicare for 559 services in 2024
CMS data shows 559 Medicare services from Dr. Umemoto across 5 procedure codes in 2024, for 324 Medicare patients. Medicare paid $49,634 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Umemoto's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3522024: 3258%
- Tests and treatments
- 2023: 2212024: 19213%
- Imaging
- 2023: 382024: 4211%
Dr. Umemoto compared with the California median for emergency medicine physicians, 2024
- Dr. Umemoto
- California median
- Medicare services
- 559vs 2652.1 times
- Medicare patients
- 324vs 24333% above
- Part D claims
- 41vs 6234% below
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Umemoto'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. Thomas Seiji Umemoto treated 324 Medicare patients in 2024, average age 74
CMS counts 324 Medicare patients who saw Dr. Umemoto in 2024. The largest group is 65 to 74, with 93 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 63% are also on Medicaid. Their average risk score is 3.00, 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. Umemoto's median patient age at 48, with 55% women.
Dr. Umemoto's Medicare patients by age, 2024
Dr. Umemoto's Medicare patients by sex, 2024
- Women16150%
- Men16350%
Chronic conditions among Dr. Umemoto's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes63%
- Heart failure52%
- Chronic kidney disease50%
- Arthritis45%
- Ischemic heart disease43%
- Mood disorders43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Umemoto's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 48
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas Seiji Umemoto wrote 99 Medicare Part D claims in 2024
In 2024, Dr. Umemoto wrote 99 Medicare Part D claims for 66 patients. 94% of them were for generic drugs. CMS names the drug for 41 of them, across 3 drugs with 11 or more claims each, at $309 in total drug cost. In 2023, CMS named 43 claims across 3 drugs.
Dr. Umemoto's Part D claims by kind of drug, 2024
- Generic93 claims94%
- Brand-name and other6 claims6%
Dr. Umemoto'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. Umemoto's Part D claims, 2024
- Opioids11%11 of 99 claims
- Antibiotics26%26 of 99 claims
- Antipsychotics, patients 65 and over12%12 of 99 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: 432024: 415%
Drugs named by CMS: 3 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
Dr. Thomas Seiji Umemoto scored 97 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Dr. Umemoto for performance year 2024, reported as part of a group. Dr. Umemoto accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Umemoto's MIPS scores, performance year 2024
- 97of 100Final score
- 90of 100Quality
- 40of 100Improvement Activities
- 78of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
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. Thomas Seiji Umemoto graduated from New York Medical College
Dr. Umemoto graduated from New York Medical College in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas Seiji Umemoto'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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Thomas Seiji Umemoto
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. Thomas Seiji Umemoto's NPI number?
Dr. Thomas Seiji Umemoto's NPI number is 1477503845. It was assigned on May 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Seiji Umemoto?
Dr. Thomas Seiji Umemoto is an emergency medicine physician in Pomona, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Thomas Seiji Umemoto practice?
Dr. Umemoto practices at 1798 N Garey Ave, Pomona, CA 91767. Dr. Umemoto's primary practice is Pomona Valley Hospital Medical Center in Pomona, California, part of Pomona Valley Hospital Medical Center.
What is Dr. Thomas Seiji Umemoto's office phone number?
The practice phone on file for Dr. Umemoto is (909) 865-9500.
What is Dr. Thomas Seiji Umemoto's medical license number?
Dr. Umemoto holds Arizona license 35259, one of the licenses on file in 2 states.
Which states has Dr. Thomas Seiji Umemoto been licensed in?
Dmand AI has state licenses on file for Dr. Umemoto in Arizona and California.
Which hospitals is Dr. Thomas Seiji Umemoto affiliated with?
Dr. Umemoto practices at Pomona Valley Hospital Medical Center in Pomona, California. Dr. Umemoto is also affiliated with Banner Boswell Medical Center.
What medical group is Dr. Thomas Seiji Umemoto part of?
Dr. Umemoto is linked to Vituity.
Does Dr. Thomas Seiji Umemoto accept Medicare?
Yes. CMS data shows Dr. Umemoto billed Medicare for 559 services in 2024, and Dr. Umemoto accepts Medicare assignment.
What is Dr. Thomas Seiji Umemoto's MIPS score?
Dr. Umemoto's MIPS final score for performance year 2024 is 97 out of 100, reported as part of a group.
Show 5 more questionsShow fewer questions
How many Medicare patients does Dr. Thomas Seiji Umemoto see?
CMS counts 324 Medicare patients who saw Dr. Umemoto in 2024, with an average age of 74.
What services does Dr. Thomas Seiji Umemoto bill to Medicare?
In 2024, Dr. Umemoto's most billed Medicare services were heart test or procedure (93010), emergency department visit (99285) and critical care (99291).
Where did Dr. Thomas Seiji Umemoto go to medical school?
Dr. Umemoto graduated from New York Medical College in 1999.
What drugs does Dr. Thomas Seiji Umemoto prescribe most?
In 2024 Medicare Part D data, Dr. Umemoto's most prescribed drugs by claims were Cephalexin, Olanzapine and Ondansetron ODT.
How long has Dr. Thomas Seiji Umemoto been practicing?
Dr. Umemoto graduated from medical school in 1999, 27 years ago.
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