Tara Chang, MD
NPI 1437166592 · Nephrology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tara Chang, MD is a Nephrology Physician provider in Stanford, CA (NPI 1437166592).
Provider details
- NPI number
- 1437166592
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A90280 (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
19 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
478 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 94 | $89 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 55 | $146 |
| Dialysis Procedure Including 1 Evaluation90945 | 48 | $99 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 43 | $133 |
| Ambulatory Blood Pressure Monitoring, 1 Day Or Longer, With Review, Interpretation and Report93790 | 40 | $20 |
| 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'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 48 | 17 |
| Amlodipine Besylate | 47 | 18 |
| Carvedilol | 44 | 13 |
| Dapagliflozin Propanediolbrand: Farxiga | 42 | 12 |
| Spironolactone | 33 | 11 |
| Empagliflozinbrand: Jardiance | 32 | — |
| Chlorthalidone |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$8,413 across 15 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)
- 300 Pasteur Drive A160Stanford Medical Specialties - Kidney ClinicPalo Alto, CA 94304-1613Phone: (650) 723-6961
Registry dates
- Enumerated
- 2006-08-02
- Last updated
- 2024-04-17
- Certified
- 2024-04-17
Frequently asked questions
- What is Tara Chang's NPI number?
- Tara Chang's National Provider Identifier (NPI) is 1437166592, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tara Chang's specialty?
- Tara Chang is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Tara Chang located?
- Tara Chang's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Tara Chang's phone number?
- The practice phone number listed in the NPPES registry for Tara Chang is (650) 725-4000.
- Does Tara Chang accept Medicare?
- Tara Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tara Chang's NPI active?
- Yes — Tara Chang's NPI (1437166592) 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.