David Sea Jong Chang, MD
NPI 1740849066 · Family Medicine Physician · Mecca, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Sea Jong Chang, MD is a Family Medicine Physician provider in Mecca, CA (NPI 1740849066).
Provider details
- NPI number
- 1740849066
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A179367 (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
7 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
32 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) |
|---|---|---|
| X-Ray of Chest, 2 Views71046 | 19 | $34 |
| Hemoglobin A1c Level83036 | 13 | $4 |
Typical Medicare-allowed amounts for these services range $4–$34 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 52 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 270 | 71 |
| Metformin Hcl | 189 | 56 |
| Lisinopril | 157 | 47 |
| Empagliflozinbrand: Jardiance | 125 | 31 |
| Dapagliflozin Propanediolbrand: Farxiga | 92 | 22 |
| Amlodipine Besylate | 81 | 33 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$221 across 11 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
- 2019-06-10
- Last updated
- 2023-11-28
- Certified
- 2023-11-28
Frequently asked questions
- What is David Sea Jong Chang's NPI number?
- David Sea Jong Chang's National Provider Identifier (NPI) is 1740849066, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Sea Jong Chang's specialty?
- David Sea Jong Chang is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Sea Jong Chang located?
- David Sea Jong Chang's practice location on file with NPPES is 91275 66th Street, Mecca, CA 92254.
- What is David Sea Jong Chang's phone number?
- The practice phone number listed in the NPPES registry for David Sea Jong Chang is (760) 396-1249.
- Does David Sea Jong Chang accept Medicare?
- David Sea Jong Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Sea Jong Chang's NPI active?
- Yes — David Sea Jong Chang's NPI (1740849066) is active in the NPPES registry as of the last update on 2023-11-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.