Isabel Chang
NPI 1821452293 · Anesthesiology Physician · Orange, CA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isabel Chang is a Anesthesiology Physician provider in Orange, CA (NPI 1821452293).
Provider details
- NPI number
- 1821452293
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
69 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 32 | $119 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 15 | $131 |
| Anesthesia for Lens Surgery00142 | 11 | $146 |
| Anesthesia for Procedure on Small and Large Bowel Using an Endoscope00813 | 11 | $153 |
Typical Medicare-allowed amounts for these services range $119–$153 (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.
Practice location
Mailing address
Additional practice locations (1)
- 300 Pasteur DrH3591Stanford, CA 94305-2200Phone: (650) 498-6606
Registry dates
- Enumerated
- 2016-04-11
- Last updated
- 2021-04-04
- Certified
- 2021-04-04
Frequently asked questions
- What is Isabel Chang's NPI number?
- Isabel Chang's National Provider Identifier (NPI) is 1821452293, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isabel Chang's specialty?
- Isabel Chang is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Isabel Chang located?
- Isabel Chang's practice location on file with NPPES is 333 City Blvd W Ste 2150, Orange, CA 92868-5920.
- What is Isabel Chang's phone number?
- The practice phone number listed in the NPPES registry for Isabel Chang is (714) 456-5501.
- Does Isabel Chang accept Medicare?
- Isabel Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isabel Chang's NPI active?
- Yes — Isabel Chang's NPI (1821452293) is active in the NPPES registry as of the last update on 2021-04-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.