DR. DIANE CHRISTINE HERMIZ DO
NPI 1962063925
Internal Medicine in Downey, CA
About Dr. Diane Christine Hermiz Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DIANE CHRISTINE HERMIZ DO (NPI 1962063925) is an individual internal medicine provider in Downey, California, licensed in California (20A19751) and active in the NPI registry since June 2019. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Diane Christine Hermiz Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Diane Hermiz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90015
- Reassigned Medicare billing, California enrollment
- 2,052 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90241 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 19
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DOWNEY, CA 90241
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 Diane Hermiz's NPI number?
The NPI number for Diane Hermiz is 1962063925. It was assigned to this individual provider in the NPPES registry on June 20, 2019.
Where is Diane Hermiz located?
Diane Hermiz practices at 10441 Lakewood Blvd Ste Ab, Downey, CA 90241. The listed phone number is (562) 869-1070.
What is Diane Hermiz's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Diane Hermiz enrolled in Medicare?
Yes. Diane Hermiz is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Diane Hermiz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Diane Hermiz reassigns Medicare benefits to Healthcare Partners Affiliates Medical Group (Los Angeles, CA). The 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 Diane Hermiz'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 Diane Hermiz was last updated on November 19, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. Diane Christine Hermiz, DO · NPI 1962063925
Internal Medicine physician in Downey, California. Individual provider, active in the CMS NPPES registry since June 20, 2019.
## Identity
- **NPI:** 1962063925 (Entity type: Individual)
- **Enumerated:** June 20, 2019
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 20A19751 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 10441 LAKEWOOD BLVD STE AB, Downey, CA 90241-2744
- **Phone:** (562) 869-1070 · **Fax:** (562) 286-8777
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Healthcare Partners Affiliates Medical Group (NPI 1659312593, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 19, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1962063925) · Data from the CMS NPPES public registry.