Timothy Ellis-Caleo, M.D.
NPI 1891258737 · Internal Medicine Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Ellis-Caleo, M.D. is a Internal Medicine Physician provider in Stanford, CA (NPI 1891258737).
Provider details
- NPI number
- 1891258737
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A176813 (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
7 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 300 Pasteur DrPalo Alto, CA 94305-2200Phone: (650) 723-6661Fax: (650) 498-6205
Registry dates
- Enumerated
- 2019-04-08
- Last updated
- 2022-08-01
- Certified
- 2022-08-01
Frequently asked questions
- What is Timothy Ellis-Caleo's NPI number?
- Timothy Ellis-Caleo's National Provider Identifier (NPI) is 1891258737, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Ellis-Caleo's specialty?
- Timothy Ellis-Caleo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Ellis-Caleo located?
- Timothy Ellis-Caleo's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Timothy Ellis-Caleo's phone number?
- The practice phone number listed in the NPPES registry for Timothy Ellis-Caleo is (650) 723-4000.
- Does Timothy Ellis-Caleo accept Medicare?
- Timothy Ellis-Caleo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Ellis-Caleo's NPI active?
- Yes — Timothy Ellis-Caleo's NPI (1891258737) is active in the NPPES registry as of the last update on 2022-08-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.