Chelsea Takamatsu, MD
Nephrology Physician · Palo Alto, CA
Chelsea Takamatsu, MD is a nephrology physician with a practice address in Palo Alto, California, and NPI 1861013096, issued on Apr 28, 2020. Check the license (California 195259, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chelsea Takamatsu
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- 195259 CA
R78078 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Palo Alto, CA 94305
- Phone
- (650) 721-6680
- Enumerated
- Apr 28, 2020
- Record last updated
- Jul 15, 2024
- Fax
- (539) 265-5945
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 300 Pasteur Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Chelsea Takamatsu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 195259Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average nephrology physician in 2024
29 Medicare Part D claims for 17 beneficiaries, against an average of 1,465 among the 10,986 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.
The MIPS final score for 2023 (Medicare payment program): 97.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $123.20
1 payment: food and beverage; the largest payer was Mallinckrodt Hospital Products Inc. The 8,230 providers of this specialty with any payment received $3,091.37 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.
Chelsea Takamatsu among 1,468 nephrology physician records in California
Chelsea Takamatsu, MD is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 97% of them.
- NPI issued2020 · 97% of these records are older, 1% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileNo · 77% of these records are
- Record last updated2024 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Palo Alto → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Shuchi Anand, MDStanford, CA 943051932238326
- Vivek Bhalla, MDStanford, CA 943051730118738
- Tara Chang, MDStanford, CA 943051437166592
- Glenn Chertow, MDStanford, CA 943051407823875
- Enrica Fung, MDStanford, CA 943051437338951
- Richard Lafayette, M.D.Stanford, CA 943051922141951
- Fadi Lakkis, MDStanford, CA 943051417175910
- Maha Mohamed, MDStanford, CA 943051750336459
Common questions
What is Chelsea Takamatsu, MD's NPI number?
Chelsea Takamatsu, MD's National Provider Identifier (NPI) is 1861013096, issued on Apr 28, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Chelsea Takamatsu, MD located?
The NPPES record lists a practice address at 300 Pasteur Dr, Palo Alto, CA, 94305. Phone: (650) 721-6680. Providers update this record themselves, so call before visiting.
How can I verify Chelsea Takamatsu, MD's license?
NPPES lists California license number 195259, 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 Chelsea Takamatsu, MD prescribe under Medicare Part D?
In 2024, Chelsea Takamatsu, MD had 29 Medicare Part D claims for 17 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Chelsea Takamatsu, MD's MIPS final score?
The 2023 MIPS final score is 97.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.