Tanja Andrea Gruber, MD
Pediatric Hematology & Oncology Physician · Palo Alto, CA
Tanja Andrea Gruber, MD is a pediatric hematology & oncology physician with a practice address in Palo Alto, California, and NPI 1457471567, issued on Mar 30, 2007. Check the license (California A89115, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tanja Andrea Gruber
- Credential
- MD
- Primary taxonomy
- Pediatric Hematology & Oncology Physician 2080P0207X
- License numbers
- A89115 CA
45680 TN
Self-reported in NPPES; status is on the state search - Practice location
- 725 Welch RD, Palo Alto, CA 94304
- Phone
- (650) 497-8000
- Enumerated
- Mar 30, 2007
- Record last updated
- Apr 16, 2024
- Medicare enrollment
- Enrolled (PECOS I20200609002577); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 2003
- Entity
- Type 1 · individual
8 nearest pediatric hematology & oncology physician records → All 417 in California → Look up another NPI →
Also registered at 725 Welch RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shayda Abadi, NPNurse Practitioner1316745540
- Natasha AbadillaStudent in an Organized Health Care Education/Training Program1194306928
- Alexandra Abbott, MDPediatrics Physician1760018675
- Steven Abboud, MDAnesthesiology Physician1619364908
- Ali Abdelhafiz Abdelsamea, MDPediatrics Physician1699390104
- Alireza Abdollah Shamshirsaz, M.D.Obstetrics & Gynecology Physician1881804235
Verify Tanja Andrea Gruber in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A89115Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Lpch Medical Group Div OF LucilePalo Alto, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tanja Andrea Gruber among 417 pediatric hematology & oncology physician records in California
Tanja Andrea Gruber, MD is one of 417 pediatric hematology & oncology physician records with a practice address in California. 53% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 35% of them.
- NPI issued2007 · 35% of these records are older, 47% newer
- In a Medicare fileYes · 53% of these records are
- In the CMS Doctors and Clinicians fileYes · 29% of these records are
- Graduated2003 · median 2004 among the 120 with a school on file
- Record last updated2024 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0207X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
81 pediatric hematology & oncology physician records list a practice address in Palo Alto
They are 81 of the 7,617 NPPES records with a practice address in Palo Alto, and 417 pediatric hematology & oncology physician records in California.
All 417 in California → Every provider in Palo Alto → Pediatric Hematology & Oncology Physician nationwide →
The 8 pediatric hematology & oncology physician records with the nearest ZIP codes
- Aileen Cohen, MDPalo Alto, CA 943041083788814
- Gary Dahl, MDPalo Alto, CA 943041164595856
- Joan Fisher, MDPalo Alto, CA 943041316919731
- Lisa Goodman, MDPalo Alto, CA 943041619079522
- Michael Jeng, MDPalo Alto, CA 943041326104670
- Norman Lacayo, MDPalo Alto, CA 943041770648586
- Louise Lo, MDPalo Alto, CA 943041033137096
- Neyssa Marina, M.D.Palo Alto, CA 943041770648792
Common questions
What is Tanja Andrea Gruber, MD's NPI number?
Tanja Andrea Gruber, MD's National Provider Identifier (NPI) is 1457471567, issued on Mar 30, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Tanja Andrea Gruber, MD located?
The NPPES record lists a practice address at 725 Welch RD, Palo Alto, CA, 94304. Phone: (650) 497-8000. Providers update this record themselves, so call before visiting.
How can I verify Tanja Andrea Gruber, MD's license?
NPPES lists California license number A89115, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.