David Hammons, MD
NPI 1639256563 · Emergency Medicine Physician · San Jose, CA
Enrolled with Medicare as Order and Referring Only - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Hammons, MD is a Emergency Medicine Physician provider in San Jose, CA (NPI 1639256563).
Provider details
- NPI number
- 1639256563
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- C35991 (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
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
Mailing address
Registry dates
- Enumerated
- 2006-10-31
- Last updated
- 2009-01-13
Frequently asked questions
- What is David Hammons's NPI number?
- David Hammons's National Provider Identifier (NPI) is 1639256563, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Hammons's specialty?
- David Hammons is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Hammons located?
- David Hammons's practice location on file with NPPES is 55 E. Julian St, San Jose, CA 95112.
- What is David Hammons's phone number?
- The practice phone number listed in the NPPES registry for David Hammons is (408) 453-3124.
- Does David Hammons accept Medicare?
- David Hammons is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Hammons's NPI active?
- Yes — David Hammons's NPI (1639256563) is active in the NPPES registry as of the last update on 2009-01-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.