NPPES file of Aug 9, 2026

Rebecca Sharon Chinthrajah, M.D.

Allergy & Immunology (Internal Medicine) Physician · Palo Alto, CA

Rebecca Sharon Chinthrajah, M.D. is an allergy & immunology (internal medicine) physician with a practice address in Palo Alto, California, and NPI 1225235120, issued on Jul 2, 2007. Check the license (California A94106, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1225235120
Name
Rebecca Sharon Chinthrajah
Credential
M.D.
Primary taxonomy
Allergy & Immunology (Internal Medicine) Physician 207RA0201X
License number
A94106 CA
Self-reported in NPPES; status is on the state search
Practice location
300 Pasteur Dr, Palo Alto, CA 94304
Phone
(650) 723-4000
Enumerated
Jul 2, 2007
Record last updated
Apr 28, 2024
Medicare enrollment
Enrolled (PECOS I20090124000000); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 300 Pasteur Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Elias Aboujaoude, MDPsychiatry Physician1649209768
  2. Connor Adams, PSYDClinical Psychologist1467081216
  3. Terence Ahern, MDEmergency Medicine Physician1104195916
  4. Teddy Akiki, MDPsychiatry Physician1942867718
  5. Amy Alexander, M.D.Psychiatry Physician1740435486
  6. Monica Allen, PSYDClinical Psychologist1952787749

Verify Rebecca Sharon Chinthrajah in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A94106
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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94% fewer Medicare Part D claims than the average allergy & immunology (internal medicine) physician in 2024

46 Medicare Part D claims, against an average of 789 among the 429 providers of this specialty who prescribed in Part D. Brand-name drugs were 59% of claims.

  1. Rebecca Chinthrajah46
  2. Specialty average789

Most prescribed

  1. Montelukast Sodium17 claims

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 practice group's MIPS final score for 2023 (Medicare payment program): 76.5 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualityout of 100 · 30% of the final score74.3
  2. Costout of 100 · 30%44.0
  3. Promoting interoperabilityout of 100 · 25%100.0
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Industry payments in 2024: $7,939.85

6 payments; by number, the most common kind was travel and lodging; the largest payer was Genentech, Inc. The 321 providers of this specialty with any payment received $7,456.30 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Rebecca Chinthrajah$7,939.85
  2. Specialty average$7,456.30

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

One hospital affiliation

  1. Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Rebecca Sharon Chinthrajah among 81 allergy & immunology (internal medicine) physician records in California

Rebecca Sharon Chinthrajah, M.D. is one of 81 allergy & immunology (internal medicine) physician records with a practice address in California. 67% 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 32% of them.

  • NPI issued2007 · 32% of these records are older, 59% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileYes · 57% of these records are
  • Graduated2004 · median 2010 among the 46 with a school on file
  • Record last updated2024 · 49% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RA0201X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Allergy & Immunology (Internal Medicine) Physician providers in California

There are 81 allergy & immunology (internal medicine) physician records in California.

The 8 allergy & immunology (internal medicine) physician records with the nearest ZIP codes

  1. Yu Wong, MDPalo Alto, CA 943041043486863
  2. Anna Arroyo, MDStanford, CA 943051205102472
  3. Meng Chen, MDStanford, CA 943051497190714
  4. Linda Zhu, MDStanford, CA 943051063839264
  5. Andrew Engler, MDSan Mateo, CA 944011366400384
  6. Zahida Maskatia, M.D.San Mateo, CA 944011134364250
  7. Nisha Patel, MDSan Mateo, CA 944011336392547
  8. Warner Greene, M.D., PH.D.San Francisco, CA 941581528403797

Common questions

What is Rebecca Sharon Chinthrajah, M.D.'s NPI number?

Rebecca Sharon Chinthrajah, M.D.'s National Provider Identifier (NPI) is 1225235120, issued on Jul 2, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Rebecca Sharon Chinthrajah, M.D. located?

The NPPES record lists a practice address at 300 Pasteur Dr, Palo Alto, CA, 94304. Phone: (650) 723-4000. Providers update this record themselves, so call before visiting.

How can I verify Rebecca Sharon Chinthrajah, M.D.'s license?

NPPES lists California license number A94106, 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 Rebecca Sharon Chinthrajah, M.D. prescribe under Medicare Part D?

In 2024, Rebecca Sharon Chinthrajah, M.D. had 46 Medicare Part D claims; the average among allergy & immunology (internal medicine) physician prescribers was 789. Part D covers Medicare prescriptions only.

What is Rebecca Sharon Chinthrajah, M.D.'s MIPS final score?

The 2023 MIPS final score is 76.5 of 100, reported for the practice group. 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.