Chang Wen Chen, MD
NPI 1033220314 · Family Medicine Physician · Knoxville, TN
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chang Wen Chen, MD is a Family Medicine Physician provider in Knoxville, TN (NPI 1033220314).
Provider details
- NPI number
- 1033220314
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD27018 (TN)
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
1,092 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 | 566 | $83 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 110 | $13 |
| Insertion of Needle Into Vein (3 Years Or Older)36410 | 84 | $16 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 79 | $118 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 75 | $117 |
| Advance Care Planning, First 30 Minutes99497 | 65 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 139 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 284 | 54 |
| Omeprazole | 276 | 84 |
| Atorvastatin Calcium | 248 | 98 |
| Amlodipine Besylate | 231 | 74 |
| Alprazolam | 228 | 32 |
| Fenofibrate | 202 | 64 |
| Lisinopril | 201 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$483 across 29 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
- 2006-08-31
- Last updated
- 2007-07-08
Frequently asked questions
- What is Chang Wen Chen's NPI number?
- Chang Wen Chen's National Provider Identifier (NPI) is 1033220314, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chang Wen Chen's specialty?
- Chang Wen Chen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Chang Wen Chen located?
- Chang Wen Chen's practice location on file with NPPES is 10430 Lovell Center Dr, Knoxville, TN 37922-3227.
- What is Chang Wen Chen's phone number?
- The practice phone number listed in the NPPES registry for Chang Wen Chen is (865) 693-6882.
- Does Chang Wen Chen accept Medicare?
- Chang Wen Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chang Wen Chen's NPI active?
- Yes — Chang Wen Chen's NPI (1033220314) 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.