Eri Joyo, M.D.
NPI 1821529512 · Internal Medicine Physician · Vacaville, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Eri Joyo, M.D. is a Internal Medicine Physician provider in Vacaville, CA (NPI 1821529512).
Provider details
- NPI number
- 1821529512
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A158584 (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
9 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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 73 | 28 |
| Methimazole | 37 | 17 |
| Hydrocortisone | 31 | 11 |
| Insulin Glargine-Yfgn | 30 | 12 |
| Insulin Lisprobrand: Humalog Kwikpen U-100 | 29 | 11 |
| Pen Needle, Diabeticbrand: Ultra-Fine Mini Pen Needle | 16 | — |
| Teriparatidebrand: Forteo | 15 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-03-23
- Last updated
- 2023-03-20
- Certified
- 2023-03-20
Frequently asked questions
- What is Eri Joyo's NPI number?
- Eri Joyo's National Provider Identifier (NPI) is 1821529512, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Eri Joyo's specialty?
- Eri Joyo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Eri Joyo located?
- Eri Joyo's practice location on file with NPPES is 1 Quality Dr Fl 3, Vacaville, CA 95688-9494.
- What is Eri Joyo's phone number?
- The practice phone number listed in the NPPES registry for Eri Joyo is (707) 624-2670.
- Does Eri Joyo accept Medicare?
- Eri Joyo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Eri Joyo's NPI active?
- Yes — Eri Joyo's NPI (1821529512) is active in the NPPES registry as of the last update on 2023-03-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.