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Ilona Sylvester, M.D.
NPI 1215959291 · Internal Medicine Physician · Ventura, CA
Ilona Sylvester, M.D. is a Internal Medicine Physician provider in Ventura, CA (NPI 1215959291).
Provider details
- NPI number
- 1215959291
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A055316 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
200 S Wells Rd
Suite 200
Ventura, CA 93004-1377
Phone: (805) 659-1740
Fax: (805) 659-9959
Street-level locationGet directions
Mailing address
200 S Wells Rd
Ventura, CA 93004-1377
Registry dates
- Enumerated
- 2006-07-25
- Last updated
- 2013-03-22
Frequently asked questions
- What is Ilona Sylvester's NPI number?
- Ilona Sylvester's National Provider Identifier (NPI) is 1215959291, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ilona Sylvester's specialty?
- Ilona Sylvester is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ilona Sylvester located?
- Ilona Sylvester's practice location on file with NPPES is 200 S Wells Rd, Ventura, CA 93004-1377.
- What is Ilona Sylvester's phone number?
- The practice phone number listed in the NPPES registry for Ilona Sylvester is (805) 659-1740.
- Is Ilona Sylvester's NPI active?
- Yes — Ilona Sylvester's NPI (1215959291) is active in the NPPES registry as of the last update on 2013-03-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.