HEATHER LYNN MCISAAC AGACNP-BC, APRN
NPI 1861022824
Nurse Practitioner - Acute Care in Fountain Valley, CA
About Heather Lynn Mcisaac Agacnp-bc, Aprn NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HEATHER LYNN MCISAAC AGACNP-BC, APRN (NPI 1861022824) is an individual acute care provider in Fountain Valley, California, licensed in California (NP95012327) and active in the NPI registry since January 2020. 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)
Heather Lynn Mcisaac Agacnp-bc, Aprn is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Heather Mcisaac reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Newport Beach, CA 92663
- Reassigned Medicare billing, California enrollment
- 8 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
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 92708 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 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
FOUNTAIN VALLEY, CA 92708
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 Heather Mcisaac's NPI number?
The NPI number for Heather Mcisaac is 1861022824. It was assigned to this individual provider in the NPPES registry on January 17, 2020.
Where is Heather Mcisaac located?
Heather Mcisaac practices at 11180 Warner Ave Ste 463, Fountain Valley, CA 92708. The listed phone number is (714) 241-9200.
What is Heather Mcisaac's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Heather Mcisaac enrolled in Medicare?
Yes. Heather Mcisaac is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Heather Mcisaac's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Heather Mcisaac reassigns Medicare benefits to Cm Providers Medical Group, PC (Newport Beach, 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 Heather Mcisaac'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 Heather Mcisaac was last updated on January 17, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Heather Lynn Mcisaac, AGACNP-BC, APRN · NPI 1861022824
Acute Care physician in Fountain Valley, California. Individual provider, active in the CMS NPPES registry since January 17, 2020.
## Identity
- **NPI:** 1861022824 (Entity type: Individual)
- **Enumerated:** January 17, 2020
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** NP95012327 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 11180 WARNER AVE STE 463, Fountain Valley, CA 92708-7505
- **Phone:** (714) 241-9200
## 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:** Cm Providers Medical Group, PC (NPI 1497444905, Newport Beach, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 17, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1861022824) · Data from the CMS NPPES public registry.