FRANK NASTANSKI MD A PROFESSIONAL CORPORATION
NPI 1265689335
Specialist in Santa Ana, CA
About Frank Nastanski Md A Professional Corporation NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
FRANK NASTANSKI MD A PROFESSIONAL CORPORATION (NPI 1265689335) is a healthcare organization registered as a specialist in Santa Ana, California and active in the NPI registry since August 2008. The organization lists Mary Zazuetta, Insurance Billing Representative, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Frank Nastanski Md A Professional Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by January 31, 2027
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
2Medicare enrollment records show 2 clinicians reassign Medicare billing to Frank Nastanski MD A Professional Corporation, which bills Medicare for the services they deliver. Of these, 2 practice within 10 miles. They are listed nearest first.
Clinicians, nearest first (2)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Frank Nastanski MD A Professional Corporation's NPI number?
The NPI number for Frank Nastanski MD A Professional Corporation is 1265689335. It was assigned to this organization in the NPPES registry on August 20, 2008.
Where is Frank Nastanski MD A Professional Corporation located?
Frank Nastanski MD A Professional Corporation is located at 999 N Tustin Ave Suite 116, Santa Ana, CA 92705. The listed phone number is (714) 547-1915.
What is Frank Nastanski MD A Professional Corporation's specialty?
The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.
Is Frank Nastanski MD A Professional Corporation enrolled in Medicare?
Yes. Frank Nastanski MD A Professional Corporation is registered in the Medicare PECOS enrollment system.
When is Frank Nastanski MD A Professional Corporation's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by January 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Frank Nastanski MD A Professional Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Frank Nastanski MD A Professional Corporation, in General Surgery and Nurse Practitioner. A 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 the clinician's services. Of these, 2 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Frank Nastanski MD A Professional Corporation was last updated on February 9, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Frank Nastanski Md A Professional Corporation · NPI 1265689335
Specialist organization in Santa Ana, California. Organization record, active in the CMS NPPES registry since August 20, 2008.
## Identity
- **NPI:** 1265689335 (Entity type: Organization)
- **Enumerated:** August 20, 2008
- **Primary specialty:** Specialist · taxonomy 174400000X
- **Organization subpart:** No
- **Authorized official:** Mary Zazuetta, INSURANCE BILLING REPRESENTATIVE
## Practice location
- **Address:** 999 N TUSTIN AVE, SUITE 116, Santa Ana, CA 92705-3528
- **Phone:** (714) 547-1915 · **Fax:** (714) 547-6552
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** January 31, 2027 (Non-DME Part B, California, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 2 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: General Surgery (1), Nurse Practitioner (1); 2 practice within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 9, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1265689335) · Data from the CMS NPPES public registry.