Jiwoon Chang, MD
NPI 1952780694 · Pulmonary Disease Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jiwoon Chang, MD is a Pulmonary Disease Physician provider in Stanford, CA (NPI 1952780694).
Provider details
- NPI number
- 1952780694
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A154679 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,049 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) |
|---|---|---|
| Aspiration of Initial Secretion of Lung Airway Using an Endoscope31645 | 215 | $61 |
| Irrigation and Suction of Lung Airways to Obtain Cells Using an Endoscope31624 | 149 | $4 |
| Biopsy of Lobe of Lung Using an Endoscope, 1 Lobe31628 | 86 | $79 |
| 3d Radiographic Procedure With Computerized Image Postprocessing76377 | 75 | $42 |
| Computer-Assisted Image-Guided Navigation of Lung Airways Using an Endoscope31627 | 73 | $103 |
| Review By Radiologist of Ct Guidance for Needle Placement77012 | 73 | $76 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 18 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$10,602 across 12 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
Additional practice locations (1)
- 550 1st AveNew York, NY 10016-6402Phone: (212) 263-5506
Registry dates
- Enumerated
- 2015-05-27
- Last updated
- 2024-04-17
- Certified
- 2024-04-17
Frequently asked questions
- What is Jiwoon Chang's NPI number?
- Jiwoon Chang's National Provider Identifier (NPI) is 1952780694, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jiwoon Chang's specialty?
- Jiwoon Chang is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Jiwoon Chang located?
- Jiwoon Chang's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305.
- What is Jiwoon Chang's phone number?
- The practice phone number listed in the NPPES registry for Jiwoon Chang is (650) 723-4000.
- Does Jiwoon Chang accept Medicare?
- Jiwoon Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jiwoon Chang's NPI active?
- Yes — Jiwoon Chang's NPI (1952780694) is active in the NPPES registry as of the last update on 2024-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.