Zachary Zwolak, D.O.
NPI 1265695571 · Addiction Medicine (Family Medicine) Physician · Ventura, CA
Enrolled with Medicare as Practitioner - Addiction Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zachary Zwolak, D.O. is a Addiction Medicine (Family Medicine) Physician provider in Ventura, CA (NPI 1265695571).
Provider details
- NPI number
- 1265695571
- Entity type
- Individual
- Primary specialty
- Addiction Medicine (Family Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 20A12298 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
193 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 42 | $81 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 38 | $121 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 38 | $84 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 30 | $177 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 29 | $100 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Rosuvastatin Calcium | 31 |
| Atorvastatin Calcium | 27 |
| Metformin Hcl | 21 |
| Meloxicam | 20 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 15 |
| Lisinopril | 15 |
| Amlodipine Besylate | 14 |
| Metoprolol Succinate | 14 |
| Tamsulosin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$201 across 9 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1280 S Victoria Avenue #250Ventura, CA 93003-6521Phone: (805) 351-0745Fax: (805) 288-6744
Registry dates
- Enumerated
- 2008-07-07
- Last updated
- 2024-08-08
- Certified
- 2024-08-08
Frequently asked questions
- What is Zachary Zwolak's NPI number?
- Zachary Zwolak's National Provider Identifier (NPI) is 1265695571, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Zwolak's specialty?
- Zachary Zwolak is listed in the NPPES registry with a primary specialty of Addiction Medicine (Family Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Zachary Zwolak located?
- Zachary Zwolak's practice location on file with NPPES is 300 Hillmont Ave, Ventura, CA 93003-1651.
- What is Zachary Zwolak's phone number?
- The practice phone number listed in the NPPES registry for Zachary Zwolak is (805) 652-6100.
- Does Zachary Zwolak accept Medicare?
- Zachary Zwolak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zachary Zwolak's NPI active?
- Yes — Zachary Zwolak's NPI (1265695571) is active in the NPPES registry as of the last update on 2024-08-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.