Jennifer Dionisio, DO
NPI 1235877150 · Family Medicine Physician · Fairfield, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennifer Dionisio, DO is a Family Medicine Physician provider in Fairfield, CA (NPI 1235877150).
Provider details
- NPI number
- 1235877150
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- Yes
- License
- 20A21920 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 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.
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) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 80 | 28 |
| Losartan Potassium | 38 | 12 |
| Amlodipine Besylate | 28 | 11 |
| Furosemide | 28 | — |
| Allopurinol | 21 | — |
| Tamsulosin Hcl | 21 | — |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 20 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-05-20
- Last updated
- 2025-09-09
- Certified
- 2025-09-09
Frequently asked questions
- What is Jennifer Dionisio's NPI number?
- Jennifer Dionisio's National Provider Identifier (NPI) is 1235877150, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer Dionisio's specialty?
- Jennifer Dionisio is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jennifer Dionisio located?
- Jennifer Dionisio's practice location on file with NPPES is 1550 Gateway Blvd, Fairfield, CA 94533-6900.
- What is Jennifer Dionisio's phone number?
- The practice phone number listed in the NPPES registry for Jennifer Dionisio is (707) 427-4000.
- Does Jennifer Dionisio accept Medicare?
- Jennifer Dionisio is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennifer Dionisio's NPI active?
- Yes — Jennifer Dionisio's NPI (1235877150) is active in the NPPES registry as of the last update on 2025-09-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.