Ben Tseng, MD
NPI 1821104373 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ben Tseng, MD is a Internal Medicine Physician provider in Chicago, IL (NPI 1821104373).
Provider details
- NPI number
- 1821104373
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036116603 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
975 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 411 | $132 |
| Hemoglobin A1c Level83036 | 137 | $10 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 102 | $133 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 95 | $187 |
| Administration of Influenza Virus VaccineG0008 | 79 | $34 |
| Admn Sarscov2 Vacc 1 Dose90480 | 51 | $45 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 107 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 360 | 118 |
| Amlodipine Besylate | 280 | 88 |
| Rosuvastatin Calcium | 255 | 79 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 233 | 37 |
| Metformin Hcl | 161 | 50 |
| Losartan Potassium | 154 | 52 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-21
- Last updated
- 2013-01-12
Frequently asked questions
- What is Ben Tseng's NPI number?
- Ben Tseng's National Provider Identifier (NPI) is 1821104373, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ben Tseng's specialty?
- Ben Tseng is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ben Tseng located?
- Ben Tseng's practice location on file with NPPES is 676 W St Clair, Chicago, IL 60611-2922.
- What is Ben Tseng's phone number?
- The practice phone number listed in the NPPES registry for Ben Tseng is (312) 926-6000.
- Does Ben Tseng accept Medicare?
- Ben Tseng is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ben Tseng's NPI active?
- Yes — Ben Tseng's NPI (1821104373) is active in the NPPES registry as of the last update on 2013-01-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.