DR. LESLIE ANN KLEIN DO
NPI 1215151006
Family Medicine in Montebello, CA
About Dr. Leslie Ann Klein Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LESLIE ANN KLEIN DO (NPI 1215151006) is an individual family medicine provider in Montebello, California, licensed in California (20A7293) and active in the NPI registry since April 2007. She is enrolled in Medicare PECOS and is a graduate of Other (1997).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
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
Dr. Leslie Ann Klein Do 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 Reassignment
Medicare enrollment records show Leslie Klein reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90032
- Reassigned Medicare billing, California enrollment
- 6 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 90640 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 4
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 Leslie Klein's NPI number?
The NPI number for Leslie Klein is 1215151006. It was assigned to this individual provider in the NPPES registry on April 12, 2007.
Where is Leslie Klein located?
Leslie Klein practices at 101 W Beverly Bl Suite 300, Montebello, CA 90640. The listed phone number is (323) 728-1201.
What is Leslie Klein's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Leslie Klein enrolled in Medicare?
Yes. Leslie Klein 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 organization bills Medicare for Leslie Klein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Leslie Klein reassigns Medicare benefits to Mosaic Family Care Medical Group, Inc. (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 Leslie Klein'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 Leslie Klein was last updated on February 18, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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. Leslie Ann Klein, DO · NPI 1215151006
Family Medicine physician in Montebello, California. Individual provider, active in the CMS NPPES registry since April 12, 2007.
## Identity
- **NPI:** 1215151006 (Entity type: Individual)
- **Enumerated:** April 12, 2007
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 20A7293 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 101 W BEVERLY BL, SUITE 300, Montebello, CA 90640
- **Phone:** (323) 728-1201 · **Fax:** (323) 728-3735
## 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:** Mosaic Family Care Medical Group, Inc. (NPI 1891830568, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1997
## Record status
- **NPPES last updated:** February 18, 2011
- **Other identifiers:** Medicare UPIN I13056 (CA); Medicare ID-Type Unspecified 20A7293 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1215151006) · Data from the CMS NPPES public registry.