DR. ZACHARY MICHAEL ZWOLAK D.O.
NPI 1265695571
Family Medicine - Addiction Medicine in Ventura, CA
About Dr. Zachary Michael Zwolak D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ZACHARY MICHAEL ZWOLAK D.O. (NPI 1265695571) is an individual addiction medicine provider in Ventura, California, licensed in California (20A12298) and active in the NPI registry since July 2008. He is enrolled in Medicare PECOS, maintains a secondary practice location in Ventura, and is a graduate of Lake Erie College Of Osteopathic Medicine, Erie (2008).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 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
Dr. Zachary Michael Zwolak D.o. 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 Zachary Zwolak reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ventura, CA 93003
- Reassigned Medicare billing, California enrollment
- 710 clinicians in this Medicare group
Ventura, CA 93003
- Reassigned Medicare billing, California enrollment
- 267 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 6
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 93003 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.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
VENTURA, CA 93003
VENTURA, CA 93003
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 Zachary Zwolak's NPI number?
The NPI number for Zachary Zwolak is 1265695571. It was assigned to this individual provider in the NPPES registry on July 7, 2008.
Where is Zachary Zwolak located?
Zachary Zwolak practices at 300 Hillmont Ave, Ventura, CA 93003. The listed phone number is (805) 652-6100.
What is Zachary Zwolak's specialty?
The primary specialty registered for this NPI is Family Medicine, specializing in Addiction Medicine, with taxonomy code 207QA0401X.
Is Zachary Zwolak enrolled in Medicare?
Yes. Zachary Zwolak 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 Zachary Zwolak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Zachary Zwolak reassigns Medicare benefits to 2 organizations: County Of Ventura (Ventura, CA) and Community Memorial Health System (Ventura, 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 Zachary Zwolak'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 Zachary Zwolak was last updated on August 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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. Zachary Michael Zwolak, D.O. · NPI 1265695571
Addiction Medicine physician in Ventura, California. Individual provider, active in the CMS NPPES registry since July 7, 2008.
## Identity
- **NPI:** 1265695571 (Entity type: Individual)
- **Enumerated:** July 7, 2008
- **Primary specialty:** Family Medicine - Addiction Medicine · taxonomy 207QA0401X
- **State license:** 20A12298 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 HILLMONT AVE, Ventura, CA 93003-1651
- **Phone:** (805) 652-6100 · **Fax:** (805) 652-3252
## 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): County Of Ventura (NPI 1619118569, Ventura, CA); Community Memorial Health System (NPI 1619453982, Ventura, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Lake Erie College Of Osteopathic Medicine, Erie, class of 2008
## Record status
- **NPPES last updated:** August 8, 2024
---
Source: [NPI Profile](https://npiprofile.com/npi/1265695571) · Data from the CMS NPPES public registry.