Irving Rosenstein, PA-C
NPI 1649756974 · Physician Assistant · Ventura, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Irving Rosenstein, PA-C is a Physician Assistant provider in Ventura, CA (NPI 1649756974).
Provider details
- NPI number
- 1649756974
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Male
- Sole proprietor
- No
- License
- 56410 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
14 documented practice locations
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Naltrexone Microspheresbrand: Vivitrol | 20 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (13)
- 828 W Ventura St Ste 100Fillmore, CA 93015-1877Phone: (805) 524-2000
- 612 Spring Rd Bldg aMoorpark, CA 93021-1298Phone: (805) 523-5400
- 2400 S C StOxnard, CA 93033-4555Phone: (805) 240-7000
- 2000 Outlet Center Dr Ste 110Oxnard, CA 93036-0608Phone: (805) 604-4588
- 3100 N Rose AveOxnard, CA 93036-1807Phone: (805) 983-6644
- 325 W Channel Islands BlvdOxnard, CA 93033-4501Phone: (805) 204-2128
- 1911 Williams Dr Ste COxnard, CA 93036-2612Phone: (805) 981-9200
- 1334 E Main StSanta Paula, CA 93060-2926Phone: (805) 933-1122
- 254 W Harvard Blvd Ste BSanta Paula, CA 93060-3920Phone: (805) 229-0200
Registry dates
- Enumerated
- 2018-07-19
- Last updated
- 2025-03-13
- Certified
- 2025-03-13
Frequently asked questions
- What is Irving Rosenstein's NPI number?
- Irving Rosenstein's National Provider Identifier (NPI) is 1649756974, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Irving Rosenstein's specialty?
- Irving Rosenstein is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Irving Rosenstein located?
- Irving Rosenstein's practice location on file with NPPES is 3147 Loma Vista Rd, Ventura, CA 93003-2917.
- What is Irving Rosenstein's phone number?
- The practice phone number listed in the NPPES registry for Irving Rosenstein is (805) 652-6694.
- Does Irving Rosenstein accept Medicare?
- Irving Rosenstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Irving Rosenstein's NPI active?
- Yes — Irving Rosenstein's NPI (1649756974) is active in the NPPES registry as of the last update on 2025-03-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.