Joseph Alvarnas, M.D.
NPI 1558321745 · Hematology (Internal Medicine) Physician · Duarte, CA
Enrolled with Medicare as Practitioner - Hematology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Alvarnas, M.D. is a Hematology (Internal Medicine) Physician provider in Duarte, CA (NPI 1558321745).
Provider details
- NPI number
- 1558321745
- Entity type
- Individual
- Primary specialty
- Hematology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 25792 (AZ)
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 tenure38% of score
20 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
Mailing address
Registry dates
- Enumerated
- 2006-03-23
- Last updated
- 2023-11-27
- Certified
- 2020-10-29
Frequently asked questions
- What is Joseph Alvarnas's NPI number?
- Joseph Alvarnas's National Provider Identifier (NPI) is 1558321745, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Alvarnas's specialty?
- Joseph Alvarnas is listed in the NPPES registry with a primary specialty of Hematology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Alvarnas located?
- Joseph Alvarnas's practice location on file with NPPES is 1500 Duarte Rd, Duarte, CA 91010-3012.
- What is Joseph Alvarnas's phone number?
- The practice phone number listed in the NPPES registry for Joseph Alvarnas is (626) 359-8111.
- Does Joseph Alvarnas accept Medicare?
- Joseph Alvarnas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Alvarnas's NPI active?
- Yes — Joseph Alvarnas's NPI (1558321745) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.