Dr. I-Wen Tseng, DO
- Medicare services, 2023
- 24
- Part D claims, 2022
- 30
- Hospital affiliations
- 1
- Industry payments
- $257
- Medical groups
- 14
- Practice address
- 425 7th Street NW, Cass Lake, MN 56633
- Practice phone
- Call (218) 335-3205
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Tseng'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. I-Wen Tseng is an emergency medicine physician in Cass Lake, Minnesota
Dr. Tseng practices at Cass Lake Indian Hospital in Cass Lake, Minnesota, part of U.S. Department of Health and Human Services.
Dr. Tseng's NPI, 1376613323, was assigned on November 8, 2006. Dr. Tseng holds New Mexico license A146008.
- NPI
- 1376613323NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0345297255
- NPI enumeration date
- November 8, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (218) 335-3205
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. I-Wen Tseng practices at Cass Lake Indian Hospital in Cass Lake, Minnesota
Dr. Tseng's primary practice is Cass Lake Indian Hospital, at 425 7th Street NW, Cass Lake, MN 56633 in Cass County. The practice phone is (218) 335-3205.
- Cass Lake Indian Hospital425 7th Street NW, Cass Lake, MN 56633 · Cass CountyPhone(218) 335-3205
Source: Dmand AI Affiliation Data
Dr. I-Wen Tseng is affiliated with 2 sites of care and 14 medical groups
Dr. Tseng's primary practice is Cass Lake Indian Hospital in Cass Lake, Minnesota, part of U.S. Department of Health and Human Services. The medical group on file is Cass Lake Indian Hospital. Dmand AI also links Dr. Tseng to 13 more medical groups and 1 group practice or clinic, each named with a free account. Dr. Tseng's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. I-Wen Tseng's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tseng practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cass Lake Indian Hospital | Available with a free account |
| +1 more site and 13 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. I-Wen Tseng is one of 1,097 emergency medicine physicians in Minnesota
Emergency medicine is Dr. Tseng's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Tseng's licenses on file in 4 states: New Mexico, California, Florida and Mississippi.
Specialties and state licenses
- Emergency medicine, New MexicoPrimary
- Family medicine, California
- Florida license
- Mississippi license
Emergency medicine physicians near Dr. Tseng
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. I-Wen Tseng billed Medicare for 24 services in 2023
CMS data shows 24 Medicare services from Dr. Tseng across 2 procedure codes in 2023. Medicare paid $2,903 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Tseng's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 1632023: 2485%
- Tests and treatments
- 2022: 262023: 0100%
Dr. Tseng compared with the Minnesota median for emergency medicine physicians, 2023
- Dr. Tseng
- Minnesota median
- Medicare services
- 24vs 23890% below
- Part D claims
- 30vs 4229% below
Medians across 1,063 emergency medicine physicians in Minnesota with Dmand AI profiles that report each measure.
Dr. Tseng's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Tseng?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tseng and other emergency medicine physicians in Minnesota.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. I-Wen Tseng's patients have a median age of 27
Across all payers, Dmand AI patient panel data puts Dr. Tseng's median patient age at 27, with 56% women.
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 27
Patient panel by sex, all payers
- Women56%
- Men44%
Source: Dmand AI Patient Panel Data
Dr. I-Wen Tseng wrote 30 Medicare Part D claims in 2022
In 2022, Dr. Tseng wrote 30 Medicare Part D claims. Every claim was for a generic drug. They cover 2 drugs, with $252 in total drug cost. In 2021, CMS named 106 claims across 6 drugs.
Dr. Tseng's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 1062022: 3072%
Drugs named by CMS: 2 in 2022, 6 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. I-Wen Tseng takes part in Medicare
Dr. Tseng 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. I-Wen Tseng received $257 in industry payments from 2016 to 2017
CMS Open Payments shows 3 general payments to Dr. Tseng from 3 drug and device companies from 2016 to 2017. Food and beverage make up the largest share, 100% of the total. The Medicines Company paid the most, $120.
General payments to Dr. Tseng by program year, 2016 to 2017
Companies that paid Dr. Tseng the most, 2016 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. I-Wen 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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. I-Wen 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. I-Wen Tseng's NPI number?
Dr. I-Wen Tseng's NPI number is 1376613323. It was assigned on November 8, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. I-Wen Tseng?
Dr. I-Wen Tseng is an emergency medicine physician in Cass Lake, Minnesota. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. I-Wen Tseng practice?
Dr. Tseng practices at 425 7th Street NW, Cass Lake, MN 56633. Dr. Tseng's primary practice is Cass Lake Indian Hospital in Cass Lake, Minnesota, part of U.S. Department of Health and Human Services. Dmand AI also links Dr. Tseng to 13 medical groups and 1 group practice or clinic.
What is Dr. I-Wen Tseng's office phone number?
The practice phone on file for Dr. Tseng is (218) 335-3205.
What is Dr. I-Wen Tseng's medical license number?
Dr. Tseng holds New Mexico license A146008, one of the licenses on file in 4 states.
Which states has Dr. I-Wen Tseng been licensed in?
Dmand AI has state licenses on file for Dr. Tseng in New Mexico, California, Florida and Mississippi.
Which hospitals is Dr. I-Wen Tseng affiliated with?
Dr. Tseng practices at Cass Lake Indian Hospital in Cass Lake, Minnesota.
What medical group is Dr. I-Wen Tseng part of?
Dr. Tseng is linked to Cass Lake Indian Hospital. Dmand AI links Dr. Tseng to 13 more medical groups.
Does Dr. I-Wen Tseng accept Medicare?
Yes. CMS data shows Dr. Tseng billed Medicare for 24 services in 2023, and Dr. Tseng accepts Medicare assignment.
What services does Dr. I-Wen Tseng bill to Medicare?
In 2023, Dr. Tseng's most billed Medicare services were emergency department visit (99285) and emergency department visit (99284).
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What drugs does Dr. I-Wen Tseng prescribe most?
In 2022 Medicare Part D data, Dr. Tseng's most prescribed drugs by claims were Cephalexin and Ibuprofen.
Has Dr. I-Wen Tseng received payments from drug or device companies?
CMS Open Payments shows $257 in general payments to Dr. Tseng from 3 companies from 2016 to 2017. The largest total came from The Medicines Company.
How long has Dr. I-Wen Tseng been practicing?
Dr. Tseng graduated from medical school in 1993, 33 years ago.
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