Chien Chiang, M.D.
NPI 1255341723 · Gastroenterology Physician · New York, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chien Chiang, M.D. is a Gastroenterology Physician provider in New York, NY (NPI 1255341723).
Provider details
- NPI number
- 1255341723
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 177439 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,241 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 305 | $101 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 188 | $9 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 80 | $16 |
| Test to Measure Expiratory Airflow and Volume94010 | 72 | $31 |
| Test for Hearing Various Pitches Using Earphone92552 | 70 | $44 |
| Test to Assess Middle Ear Muscle Reflex92568 | 70 | $16 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 116 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 935 | 159 |
| Amlodipine Besylate | 752 | 111 |
| Omeprazole | 560 | 125 |
| Tenofovir Alafenamidebrand: Vemlidy | 344 | 34 |
| Pantoprazole Sodium | 303 | 95 |
| Metformin Hcl | 278 | 41 |
| Olmesartan Medoxomil |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$526 across 21 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-08
- Last updated
- 2007-07-08
Frequently asked questions
- What is Chien Chiang's NPI number?
- Chien Chiang's National Provider Identifier (NPI) is 1255341723, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chien Chiang's specialty?
- Chien Chiang is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Chien Chiang located?
- Chien Chiang's practice location on file with NPPES is 109 Lafayette St, New York, NY 10013-4154.
- What is Chien Chiang's phone number?
- The practice phone number listed in the NPPES registry for Chien Chiang is (212) 941-7856.
- Does Chien Chiang accept Medicare?
- Chien Chiang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chien Chiang's NPI active?
- Yes — Chien Chiang's NPI (1255341723) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.