Bayard Chang, M.D.
NPI 1104816255 · Internal Medicine Physician · Sacramento, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Bayard Chang, M.D. is a Internal Medicine Physician provider in Sacramento, CA (NPI 1104816255).
Provider details
- NPI number
- 1104816255
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G064347 (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
2,498 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 | 577 | $96 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 376 | $15 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 365 | $190 |
| Administration of Influenza Virus VaccineG0008 | 276 | $34 |
| Admn Sarscov2 Vacc 1 Dose90480 | 212 | $46 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 143 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 412 | 99 |
| Amlodipine Besylate | 291 | 67 |
| Zolpidem Tartrate | 198 | 46 |
| Levothyroxine Sodium | 186 | 47 |
| Pantoprazole Sodium | 147 | 36 |
| Apixabanbrand: Eliquis | 146 | 26 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$435 across 19 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
- 2005-10-28
- Last updated
- 2008-01-25
Frequently asked questions
- What is Bayard Chang's NPI number?
- Bayard Chang's National Provider Identifier (NPI) is 1104816255, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Bayard Chang's specialty?
- Bayard Chang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Bayard Chang located?
- Bayard Chang's practice location on file with NPPES is 500 University Ave, Sacramento, CA 95825-6504.
- What is Bayard Chang's phone number?
- The practice phone number listed in the NPPES registry for Bayard Chang is (916) 929-2526.
- Does Bayard Chang accept Medicare?
- Bayard Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Bayard Chang's NPI active?
- Yes — Bayard Chang's NPI (1104816255) is active in the NPPES registry as of the last update on 2008-01-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.