Defeng Chen, MD
NPI 1689602112 · Internal Medicine Physician · Corpus Christi, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Defeng Chen, MD is a Internal Medicine Physician provider in Corpus Christi, TX (NPI 1689602112).
Provider details
- NPI number
- 1689602112
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 229821 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
4,291 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 2,390 | $75 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 1,069 | $112 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 323 | $164 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 315 | $109 |
| Critical Care, First 30-74 Minutes99291 | 160 | $197 |
| Advance Care Planning, First 30 Minutes99497 | 22 | $71 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 63 | 56 |
| Pantoprazole Sodium | 49 | 47 |
| Lisinopril | 36 | 33 |
| Furosemide | 35 | 33 |
| Losartan Potassium | 30 | 28 |
| Amlodipine Besylate | 29 | 28 |
| Metoprolol Tartrate | 29 |
Practice location
Mailing address
Additional practice locations (1)
- 345 S Water StCorpus Christi, TX 78401-2819Phone: (361) 500-0600
Registry dates
- Enumerated
- 2006-06-30
- Last updated
- 2022-08-14
- Certified
- 2022-08-14
Frequently asked questions
- What is Defeng Chen's NPI number?
- Defeng Chen's National Provider Identifier (NPI) is 1689602112, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Defeng Chen's specialty?
- Defeng Chen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Defeng Chen located?
- Defeng Chen's practice location on file with NPPES is 600 Elizabeth St, Corpus Christi, TX 78404-2235.
- What is Defeng Chen's phone number?
- The practice phone number listed in the NPPES registry for Defeng Chen is (361) 881-3000.
- Does Defeng Chen accept Medicare?
- Defeng Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Defeng Chen's NPI active?
- Yes — Defeng Chen's NPI (1689602112) is active in the NPPES registry as of the last update on 2022-08-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.