EMMA ELIZABETH HEER MAZZILLI MSN, RN, AGACNP-BC
NPI 1093349532
Nurse Practitioner - Gerontology in Duarte, CA
About Emma Elizabeth Heer Mazzilli Msn, Rn, Agacnp-bc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
EMMA ELIZABETH HEER MAZZILLI MSN, RN, AGACNP-BC (NPI 1093349532) is an individual gerontology provider in Duarte, California, licensed in California (95011386) and active in the NPI registry since February 2020. She is enrolled in Medicare PECOS and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 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
Emma Elizabeth Heer Mazzilli Msn, Rn, Agacnp-bc 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
2Medicare enrollment records show Emma Mazzilli reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Duarte, CA 91010
- Reassigned Medicare billing, California enrollment
- 1,335 clinicians in this Medicare group
Los Angeles, CA 90048
- Reassigned Medicare billing, California enrollment
- 1,001 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 2
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 91010 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.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DUARTE, CA 91010
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 Emma Mazzilli's NPI number?
The NPI number for Emma Mazzilli is 1093349532. It was assigned to this individual provider in the NPPES registry on February 24, 2020. The provider is also known as Emma Elizabeth Heer Msn, Rn, Agacnp-Bc.
Where is Emma Mazzilli located?
Emma Mazzilli practices at 1500 Duarte Rd, Duarte, CA 91010. The listed phone number is (626) 256-4673.
What is Emma Mazzilli's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Gerontology, with taxonomy code 363LG0600X.
Is Emma Mazzilli enrolled in Medicare?
Yes. Emma Mazzilli 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 Emma Mazzilli's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Emma Mazzilli reassigns Medicare benefits to 2 organizations: City Of Hope Medical Foundation (Duarte, CA) and Cedars-Sinai Medical Center (Los Angeles, CA). 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 Emma Mazzilli'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 Emma Mazzilli was last updated on November 16, 2020. 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.
# Emma Elizabeth Heer Mazzilli, MSN, RN, AGACNP-BC · NPI 1093349532
Gerontology physician in Duarte, California. Individual provider, active in the CMS NPPES registry since February 24, 2020.
## Identity
- **NPI:** 1093349532 (Entity type: Individual)
- **Enumerated:** February 24, 2020
- **Primary specialty:** Nurse Practitioner - Gerontology · taxonomy 363LG0600X
- **State license:** 95011386 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1500 DUARTE RD, Duarte, CA 91010-3012
- **Phone:** (626) 256-4673
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): City Of Hope Medical Foundation (NPI 1871886366, Duarte, CA); Cedars-Sinai Medical Center (NPI 1639172372, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** November 16, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1093349532) · Data from the CMS NPPES public registry.