Dennis Chang, M.D.
NPI 1811939952 · Family Medicine Physician · Arcadia, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dennis Chang, M.D. is a Family Medicine Physician provider in Arcadia, CA (NPI 1811939952).
Provider details
- NPI number
- 1811939952
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A80774 (CA)
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
20 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
423 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 | 172 | $98 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 94 | $139 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 89 | $21 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 29 | $138 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 20 | $98 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 147 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 626 | 188 |
| Levothyroxine Sodium | 425 | 119 |
| Rosuvastatin Calcium | 393 | 126 |
| Metoprolol Succinate | 326 | 94 |
| Amlodipine Besylate | 321 | 103 |
| Losartan Potassium | 275 | 83 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$447 across 6 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
- 2006-06-12
- Last updated
- 2011-07-21
Frequently asked questions
- What is Dennis Chang's NPI number?
- Dennis Chang's National Provider Identifier (NPI) is 1811939952, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dennis Chang's specialty?
- Dennis Chang is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Dennis Chang located?
- Dennis Chang's practice location on file with NPPES is 624 W Duarte Rd, Arcadia, CA 91007-7603.
- What is Dennis Chang's phone number?
- The practice phone number listed in the NPPES registry for Dennis Chang is (626) 254-9540.
- Does Dennis Chang accept Medicare?
- Dennis Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dennis Chang's NPI active?
- Yes — Dennis Chang's NPI (1811939952) is active in the NPPES registry as of the last update on 2011-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.