John Frederick Tan, MD
Pediatric Hematology & Oncology Physician · Palo Alto, CA
John Frederick Tan, MD is a pediatric hematology & oncology physician with a practice address in Palo Alto, California, and NPI 1568680023, issued on Apr 23, 2007. Check the license (California A103406, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Frederick Tan
- Credential
- MD
- Primary taxonomy
- Pediatric Hematology & Oncology Physician 2080P0207X
- License numbers
- A103406 CA
LP00201 RI
Self-reported in NPPES; status is on the state search - Practice location
- 725 Welch RD, Palo Alto, CA 94304
- Phone
- (650) 497-8000
- Enumerated
- Apr 23, 2007
- Record last updated
- Apr 16, 2024
- 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 John Frederick Tan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A103406Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average pediatric hematology & oncology physician in 2024
12 Medicare Part D claims, against an average of 94 among the 300 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $110.53
1 payment: food and beverage; the largest payer was Stemline Therapeutics Inc. The 1,215 providers of this specialty with any payment received $7,404.07 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
John Frederick Tan among 417 pediatric hematology & oncology physician records in California
John Frederick Tan, 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 fileNo · 29% of these records are
- 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 John Frederick Tan, MD's NPI number?
John Frederick Tan, MD's National Provider Identifier (NPI) is 1568680023, issued on Apr 23, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Frederick Tan, 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 John Frederick Tan, MD's license?
NPPES lists California license number A103406, 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.
How much does John Frederick Tan, MD prescribe under Medicare Part D?
In 2024, John Frederick Tan, MD had 12 Medicare Part D claims; the average among pediatric hematology & oncology physician prescribers was 94. Part D covers Medicare prescriptions only.
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.