NPPES file of Aug 9, 2026

Daniel P. Chelliah, MD

Infectious Disease Physician · Mountain View, CA

Daniel P. Chelliah, MD is an infectious disease physician with a practice address in Mountain View, California, and NPI 1174847933, issued on Mar 23, 2010. Check the license (California A121423, 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 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1174847933
Name
Daniel P. Chelliah
Credential
MD
Primary taxonomy
Infectious Disease Physician 207RI0200X
License number
A121423 CA
Self-reported in NPPES; status is on the state search
Practice location
701 E. EL Camino Real, Mountain View, CA 94040
Phone
(650) 934-7599
Enumerated
Mar 23, 2010
Record last updated
Oct 7, 2016 (not updated in 10 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20161014002057); accepts Medicare assignment
Medical or professional school
Loma Linda University School Of Medicine, 2010
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 701 E. EL Camino Real

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

  1. Estela Ayala Meyer, M.D.Pulmonary Disease Physician1063608719
  2. Vidya Bhandarkar, MDPediatrics Physician1225179138
  3. Punam Bhullar, M.D.Internal Medicine Physician1245521475
  4. Calvin Chen, MDFamily Medicine Physician1659369544
  5. David Chen, MDNeurology Physician1730155441
  6. Michael Chiou, M.D.Diagnostic Radiology Physician1245530419

Verify Daniel P. Chelliah in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A121423
    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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43% fewer Medicare Part D claims than the average infectious disease physician in 2024

396 Medicare Part D claims for 80 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.

  1. Daniel Chelliah396
  2. Specialty average689

Most prescribed

  1. Rifampin41 claims
  2. Genvoya28 claims
  3. Biktarvy25 claims
  4. Ethambutol Hcl24 claims
  5. Amoxicillin23 claims
  6. Penicillin V Potassium21 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.

Bills Medicare through one group practice

  1. Sutter Bay Medical FoundationMountain View, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Daniel P. Chelliah among 1,119 infectious disease physician records in California

Daniel P. Chelliah, MD is one of 1,119 infectious disease physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 69% of them.

  • NPI issued2010 · 69% of these records are older, 28% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 66% of these records are
  • Graduated2010 · median 2003 among the 735 with a school on file
  • Record last updated2016 · 59% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Infectious Disease Physician providers in California

There are 1,119 infectious disease physician records in California.

The 8 infectious disease physician records with the nearest ZIP codes

  1. Carol Kemper, MDMountain View, CA 940401588628960
  2. Andreas Kogelnik, M.D., PH.D.Mountain View, CA 940401922113331
  3. Aung Lin, DOMountain View, CA 940401124521935
  4. Kristin Razzeca, M.D.Mountain View, CA 940401275540460
  5. Daniel Shin, M.D.Mountain View, CA 940401427065960
  6. Ashley Styczynski, M.D.Mountain View, CA 940401730447863
  7. Michele Tang, M.D.Mountain View, CA 940401851680797
  8. Marnie Elizaga, MDMenlo Park, CA 940251114131232

Common questions

What is Daniel P. Chelliah, MD's NPI number?

Daniel P. Chelliah, MD's National Provider Identifier (NPI) is 1174847933, issued on Mar 23, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Daniel P. Chelliah, MD located?

The NPPES record lists a practice address at 701 E. EL Camino Real, Mountain View, CA, 94040. Phone: (650) 934-7599. Providers update this record themselves, so call before visiting.

How can I verify Daniel P. Chelliah, MD's license?

NPPES lists California license number A121423, 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 Daniel P. Chelliah, MD prescribe under Medicare Part D?

In 2024, Daniel P. Chelliah, MD had 396 Medicare Part D claims for 80 beneficiaries; the average among infectious disease physician prescribers was 689. 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.