Chun Hsu, M.D.
NPI 1902831894 · Gastroenterology Physician · Monterey Park, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chun Hsu, M.D. is a Gastroenterology Physician provider in Monterey Park, CA (NPI 1902831894).
Provider details
- NPI number
- 1902831894
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A37929 (CA)
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
281 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 113 | $98 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 57 | $139 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 56 | $182 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 42 | $143 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 13 | $120 |
Typical Medicare-allowed amounts for these services range $98–$182 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 60 | 59 |
| Famotidine | 51 | 26 |
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 38 | 38 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 38 | 38 |
| Omeprazole | 35 | 21 |
| Tenofovir Alafenamidebrand: Vemlidy | 32 | — |
| Peg3350/Sod Sulf,bicarb,cl/Kcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-11
- Last updated
- 2010-07-22
Frequently asked questions
- What is Chun Hsu's NPI number?
- Chun Hsu's National Provider Identifier (NPI) is 1902831894, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chun Hsu's specialty?
- Chun Hsu is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Chun Hsu located?
- Chun Hsu's practice location on file with NPPES is 600 N Garfield Ave, Monterey Park, CA 91754-1172.
- What is Chun Hsu's phone number?
- The practice phone number listed in the NPPES registry for Chun Hsu is (626) 573-9979.
- Does Chun Hsu accept Medicare?
- Chun Hsu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chun Hsu's NPI active?
- Yes — Chun Hsu's NPI (1902831894) is active in the NPPES registry as of the last update on 2010-07-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.