Kamyar Kalantar-Zadeh, M.D.
NPI 1457314684 · Nephrology Physician · Orange, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kamyar Kalantar-Zadeh, M.D. is a Nephrology Physician provider in Orange, CA (NPI 1457314684).
Provider details
- NPI number
- 1457314684
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A61298 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,028 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
Additional practice locations (1)
- 21840 Normandie AveSte. 700Torrance, CA 90502-2047Phone: (310) 222-5101Fax: (310) 320-5463
Registry dates
- Enumerated
- 2006-04-10
- Last updated
- 2023-02-21
- Certified
- 2023-02-21
Frequently asked questions
- What is Kamyar Kalantar-Zadeh's NPI number?
- Kamyar Kalantar-Zadeh's National Provider Identifier (NPI) is 1457314684, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kamyar Kalantar-Zadeh's specialty?
- Kamyar Kalantar-Zadeh is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Kamyar Kalantar-Zadeh located?
- Kamyar Kalantar-Zadeh's practice location on file with NPPES is 101 the City Dr S, Orange, CA 92868-3201.
- What is Kamyar Kalantar-Zadeh's phone number?
- The practice phone number listed in the NPPES registry for Kamyar Kalantar-Zadeh is (714) 880-7812.
- Does Kamyar Kalantar-Zadeh accept Medicare?
- Kamyar Kalantar-Zadeh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kamyar Kalantar-Zadeh's NPI active?
- Yes — Kamyar Kalantar-Zadeh's NPI (1457314684) is active in the NPPES registry as of the last update on 2023-02-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.