Dr. Thomas Mu-Ren Tseng, DO
- Medicare services, 2024
- 16,540
- Medicare patients, 2024
- 494
- Part D claims, 2024
- 21,214
- Industry payments
- $17,289
- Affiliated sites
- 5
- Practice address
- 880 South Atlantic Blvd, G10, Monterey Park, CA 91754
- Practice phone
- Call (626) 872-6261
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Gastroenterology Diagnostic Center - Monterey Park
Surgery Center - Medicare-Certified · Monterey Park, California
Find Dr. Tseng's professional email, personal email and mobile number
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Dr. Thomas Mu-Ren Tseng is an internist in Monterey Park, California
Dr. Tseng practices at Gastroenterology Diagnostic Center - Monterey Park in Monterey Park, California.
Dr. Tseng's NPI, 1912017211, was assigned on August 30, 2006. Dr. Tseng holds California license 20A6968.
- NPI
- 1912017211NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7214099241
- NPI enumeration date
- August 30, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (626) 872-6261
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas Mu-Ren Tseng practices at Gastroenterology Diagnostic Center - Monterey Park in Monterey Park, California
Dr. Tseng's primary practice is Gastroenterology Diagnostic Center - Monterey Park, at 880 South Atlantic Blvd, G10, Monterey Park, CA 91754. The practice phone is (626) 872-6261.
- Gastroenterology Diagnostic Center - Monterey Park880 South Atlantic Blvd, G10, Monterey Park, CA 91754Phone(626) 872-6261
Source: Dmand AI Affiliation Data
Dr. Thomas Mu-Ren Tseng is affiliated with 5 sites of care
Dr. Tseng's primary practice is Gastroenterology Diagnostic Center - Monterey Park in Monterey Park, California. Dmand AI also links Dr. Tseng to 3 home health agencies and 1 physician office, 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. Thomas Mu-Ren Tseng's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tseng practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Gastroenterology Diagnostic Center - Monterey Park | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas Mu-Ren Tseng is one of 16,751 internists in California
Internal medicine is Dr. Tseng's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Tseng is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Tseng
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. Thomas Mu-Ren Tseng billed Medicare for 16,540 services in 2024
CMS data shows 16,540 Medicare services from Dr. Tseng across 21 procedure codes in 2024, for 494 Medicare patients. Medicare paid $819,539 for them. Every service was in an office.
Dr. Tseng's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8,2972024: 13,40762%
- Other services
- 2023: 9432024: 2,977216%
- Tests and treatments
- 2023: 1432024: 10030%
- Lab and pathology
- 2023: 352024: 5660%
- Drugs given in the office
- 2023: 2792024: 0100%
Dr. Tseng compared with the California median for internists, 2024
- Dr. Tseng
- California median
- Medicare services
- 16,540vs 36145.8 times
- Medicare patients
- 494vs 1513.3 times
- Part D claims
- 20,398vs 42148.5 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Tseng'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 Mu-Ren Tseng treated 494 Medicare patients in 2024, average age 76
CMS counts 494 Medicare patients who saw Dr. Tseng in 2024. The largest group is 65 to 74, with 215 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 60% are also on Medicaid. Their average risk score is 1.35, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Tseng's median patient age at 62, with 54% women.
Dr. Tseng's Medicare patients by age, 2024
Dr. Tseng's Medicare patients by sex, 2024
- Women30762%
- Men18738%
Chronic conditions among Dr. Tseng's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease71%
- Arthritis51%
- Osteoporosis41%
- Diabetes39%
- Depression31%
- Mood disorders31%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tseng's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas Mu-Ren Tseng wrote 21,214 Medicare Part D claims in 2024
In 2024, Dr. Tseng wrote 21,214 Medicare Part D claims for 1,049 patients. 89% of them were for generic drugs. CMS names the drug for 20,398 of them, across 186 drugs with 11 or more claims each, at $1,548,016 in total drug cost. In 2023, CMS named 16,653 claims across 172 drugs.
Dr. Tseng's Part D claims by kind of drug, 2024
- Generic18,901 claims89%
- Brand-name2,232 claims11%
- Other81 claims0%
Dr. Tseng'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. Tseng's Part D claims, 2024
- Opioids0%24 of 21,214 claims
- Antibiotics2%528 of 21,214 claims
- Antipsychotics, patients 65 and over0%59 of 21,214 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: 16,6532024: 20,39822%
Drugs named by CMS: 186 in 2024, 172 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 Mu-Ren Tseng offers telehealth to Medicare patients
Dr. Tseng accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Tseng as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Thomas Mu-Ren Tseng received $17,289 in industry payments from 2016 to 2025
CMS Open Payments shows 824 general payments to Dr. Tseng from 49 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 95% of the total. Amgen Inc. paid the most, $4,336.
General payments to Dr. Tseng by program year, 2016 to 2025
General payments to Dr. Tseng by kind, 2016 to 2025
- Food and beverage$16,39495%
- Education$8945%
Companies that paid Dr. Tseng the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Thomas Mu-Ren Tseng'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) |
| 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. Thomas Mu-Ren Tseng
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 Mu-Ren Tseng's NPI number?
Dr. Thomas Mu-Ren Tseng's NPI number is 1912017211. It was assigned on August 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Mu-Ren Tseng?
Dr. Thomas Mu-Ren Tseng is an internist in Monterey Park, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Thomas Mu-Ren Tseng practice?
Dr. Tseng practices at 880 South Atlantic Blvd, G10, Monterey Park, CA 91754. Dr. Tseng's primary practice is Gastroenterology Diagnostic Center - Monterey Park in Monterey Park, California. Dmand AI also links Dr. Tseng to 3 home health agencies and 1 physician office.
What is Dr. Thomas Mu-Ren Tseng's office phone number?
The practice phone on file for Dr. Tseng is (626) 872-6261.
What is Dr. Thomas Mu-Ren Tseng's medical license number?
Dr. Tseng holds California license 20A6968.
Does Dr. Thomas Mu-Ren Tseng accept Medicare?
Yes. CMS data shows Dr. Tseng billed Medicare for 16,540 services in 2024, and Dr. Tseng accepts Medicare assignment.
Does Dr. Thomas Mu-Ren Tseng offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Tseng as offering telehealth services.
How many Medicare patients does Dr. Thomas Mu-Ren Tseng see?
CMS counts 494 Medicare patients who saw Dr. Tseng in 2024, with an average age of 76.
What services does Dr. Thomas Mu-Ren Tseng bill to Medicare?
In 2024, Dr. Tseng's most billed Medicare services were care management and other visits (99439), care management and other visits (99490) and care management and other visits (99457).
What drugs does Dr. Thomas Mu-Ren Tseng prescribe most?
In 2024 Medicare Part D data, Dr. Tseng's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Pantoprazole Sodium.
Has Dr. Thomas Mu-Ren Tseng received payments from drug or device companies?
CMS Open Payments shows $17,289 in general payments to Dr. Tseng from 49 companies from 2016 to 2025. The largest total came from Amgen Inc.
How long has Dr. Thomas Mu-Ren Tseng been practicing?
Dr. Tseng graduated from medical school in 1995, 31 years ago.
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