Wootaek Chang
NPI 1437167590 · Nephrology Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wootaek Chang is a Nephrology Physician provider in Brooklyn, NY (NPI 1437167590).
Provider details
- NPI number
- 1437167590
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
- License
- 171373 (NY)
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
19 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
179 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) |
|---|---|---|
| Home Dialysis Services Per Month (20 Years Or Older)90966 | 92 | $325 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 87 | $391 |
Typical Medicare-allowed amounts for these services range $325–$391 (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 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sevelamer Carbonate | 79 | 16 |
| Calcium Acetate | 64 | 15 |
| Nifedipinebrand: Nifedipine Er | 62 | 11 |
| Minoxidil | 49 | — |
| Metoprolol Succinate | 42 | — |
| Amlodipine Besylate | 32 | — |
| Furosemide | 31 | — |
| Carvedilol |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$49 across 2 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
- 2006-08-04
- Last updated
- 2013-08-09
Frequently asked questions
- What is Wootaek Chang's NPI number?
- Wootaek Chang's National Provider Identifier (NPI) is 1437167590, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wootaek Chang's specialty?
- Wootaek Chang is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Wootaek Chang located?
- Wootaek Chang's practice location on file with NPPES is 121 Dekalb Ave, Brooklyn, NY 11201-5425.
- What is Wootaek Chang's phone number?
- The practice phone number listed in the NPPES registry for Wootaek Chang is (718) 250-8022.
- Does Wootaek Chang accept Medicare?
- Wootaek Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wootaek Chang's NPI active?
- Yes — Wootaek Chang's NPI (1437167590) is active in the NPPES registry as of the last update on 2013-08-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.