ALIREZA HOSSEINI MD
NPI 1629324140
Internal Medicine - Endocrinology, Diabetes & Metabolism in Mission Viejo, CA
About Alireza Hosseini Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALIREZA HOSSEINI MD (NPI 1629324140) is an individual endocrinology, diabetes & metabolism provider in Mission Viejo, California, licensed in California (A142579) and active in the NPI registry since August 2012. He is enrolled in Medicare PECOS and is a graduate of Other (2000).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Alireza Hosseini Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
7Medicare enrollment records show Alireza Hosseini reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Mission Viejo, CA 92691
- Reassigned Medicare billing, California enrollment
Irvine, CA 92617
- Reassigned Medicare billing, California enrollment
- 118 clinicians in this Medicare group
Anaheim, CA 92801
- Reassigned Medicare billing, California enrollment
- 7 clinicians in this Medicare group
Pomona, CA 91766
- Reassigned Medicare billing, California enrollment
- 1,939 clinicians in this Medicare group
Mojave, CA 93501
- Reassigned Medicare billing, California enrollment
- 192 clinicians in this Medicare group
Clearlake, CA 95422
- Reassigned Medicare billing, California enrollment
- 182 clinicians in this Medicare group
Ukiah, CA 95482
- Reassigned Medicare billing, California enrollment
- 221 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 7
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92691 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MISSION VIEJO, CA 92691
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Alireza Hosseini's NPI number?
The NPI number for Alireza Hosseini is 1629324140. It was assigned to this individual provider in the NPPES registry on August 2, 2012. The provider is also known as Alireza Hosseini-Khalili MD.
Where is Alireza Hosseini located?
Alireza Hosseini practices at 25982 Pala Ste 140, Mission Viejo, CA 92691. The listed phone number is (310) 328-6837.
What is Alireza Hosseini's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Alireza Hosseini enrolled in Medicare?
Yes. Alireza Hosseini is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Alireza Hosseini's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alireza Hosseini reassigns Medicare benefits to 7 organizations: Hosseini MD Medical Inc (Mission Viejo, CA), Confermed Of California PC (Irvine, CA), Aleem Syed MD A Professional Corporation (Anaheim, CA), County Of Los Angeles (Pomona, CA), Adventist Health Medical Center Tehachapi (Mojave, CA) and 2 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alireza Hosseini's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Alireza Hosseini was last updated on February 13, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Alireza Hosseini, MD · NPI 1629324140
Endocrinology, Diabetes & Metabolism physician in Mission Viejo, California. Individual provider, active in the CMS NPPES registry since August 2, 2012.
## Identity
- **NPI:** 1629324140 (Entity type: Individual)
- **Enumerated:** August 2, 2012
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** A142579 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 25982 PALA STE 140, Mission Viejo, CA 92691-6724
- **Phone:** (310) 328-6837
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 7 organizations under Medicare reassignment (form CMS-855R): Hosseini MD Medical Inc (NPI 1891386843, Mission Viejo, CA); Confermed Of California PC (NPI 1316584709, Irvine, CA); Aleem Syed MD A Professional Corporation (NPI 1609972256, Anaheim, CA); County Of Los Angeles (NPI 1649464496, Pomona, CA); Adventist Health Medical Center Tehachapi (NPI 1508175431, Mojave, CA); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2000
## Record status
- **NPPES last updated:** February 13, 2021
---
Source: [NPI Profile](https://npiprofile.com/npi/1629324140) · Data from the CMS NPPES public registry.