Jennifer Chang, M.D.
NPI 1568631091 · Endocrinology, Diabetes & Metabolism Physician · Pasadena, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennifer Chang, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Pasadena, CA (NPI 1568631091).
Provider details
- NPI number
- 1568631091
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 102118 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
1,189 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 828 | $138 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 119 | $36 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 104 | $16 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 90 | $17 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 48 | $177 |
Typical Medicare-allowed amounts for these services range $16–$177 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 48 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 476 | 124 |
| Tirzepatidebrand: Mounjaro | 303 | 55 |
| Semaglutidebrand: Ozempic | 255 | 40 |
| Empagliflozinbrand: Jardiance | 254 | 60 |
| Dulaglutidebrand: Trulicity | 249 | 42 |
| Metformin Hcl | 244 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$921 across 41 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
- 2008-02-28
- Last updated
- 2014-01-20
Frequently asked questions
- What is Jennifer Chang's NPI number?
- Jennifer Chang's National Provider Identifier (NPI) is 1568631091, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer Chang's specialty?
- Jennifer Chang is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Jennifer Chang located?
- Jennifer Chang's practice location on file with NPPES is 55 E California Blvd, Pasadena, CA 91105-3954.
- What is Jennifer Chang's phone number?
- The practice phone number listed in the NPPES registry for Jennifer Chang is (626) 397-8323.
- Does Jennifer Chang accept Medicare?
- Jennifer Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennifer Chang's NPI active?
- Yes — Jennifer Chang's NPI (1568631091) is active in the NPPES registry as of the last update on 2014-01-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.