Tanja Gruber, MD
NPI 1457471567 · Pediatric Hematology & Oncology Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tanja Gruber, MD is a Pediatric Hematology & Oncology Physician provider in Palo Alto, CA (NPI 1457471567).
Provider details
- NPI number
- 1457471567
- Entity type
- Individual
- Primary specialty
- Pediatric Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A89115 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 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 (2)
- 4650 W Sunset BlvdLos Angeles, CA 90027-6062Phone: (323) 669-2534
- 262 Danny Thomas PlMemphis, TN 38105-3678Phone: (901) 595-3300Fax: (901) 595-3842
Registry dates
- Enumerated
- 2007-03-30
- Last updated
- 2024-04-16
- Certified
- 2024-04-16
Frequently asked questions
- What is Tanja Gruber's NPI number?
- Tanja Gruber's National Provider Identifier (NPI) is 1457471567, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tanja Gruber's specialty?
- Tanja Gruber is listed in the NPPES registry with a primary specialty of Pediatric Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Tanja Gruber located?
- Tanja Gruber's practice location on file with NPPES is 725 Welch Rd, Palo Alto, CA 94304-1601.
- What is Tanja Gruber's phone number?
- The practice phone number listed in the NPPES registry for Tanja Gruber is (650) 497-8000.
- Does Tanja Gruber accept Medicare?
- Tanja Gruber is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tanja Gruber's NPI active?
- Yes — Tanja Gruber's NPI (1457471567) is active in the NPPES registry as of the last update on 2024-04-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.