NPPES file of Aug 9, 2026

Ly Viet Do, M.D.

Radiation Oncology Physician · San Jose, CA

Ly Viet Do, M.D. is a radiation oncology physician with a practice address in San Jose, California, and NPI 1376706929, issued on Jul 3, 2008. Check the license (California A88783, 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
1376706929
Name
Ly Viet Do
Credential
M.D.
Primary taxonomy
Radiation Oncology Physician 2085R0001X
License number
A88783 CA
Self-reported in NPPES; status is on the state search
Practice location
200 Jose Figueres Ave, San Jose, CA 95116
Phone
(408) 729-4673
Enumerated
Jul 3, 2008
Record last updated
Jan 25, 2011 (not updated in 15 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20081106000673); accepts Medicare assignment
Medical or professional school
University Of California, Irvine, California College Of Medicine, 2003
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 200 Jose Figueres Ave

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

  1. Fakhar Abbas, MDInternal Medicine Physician1578022422
  2. Mohammed Ahmed, M.D.Cardiovascular Disease Physician1770593105
  3. Munawar Alavi, M.D.Specialist1851334403
  4. Manjari Aravamuthan, M.DInternal Medicine Physician1154410322
  5. Morteza Dowlatshahi, M.D.Radiation Oncology Physician1437112158
  6. Rashid Elahi, M.D.Nephrology Physician1790753408

Verify Ly Viet Do in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A88783
    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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4% fewer Medicare Part D claims than the average radiation oncology physician in 2024

129 Medicare Part D claims for 53 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims. 44 claims were for opioids.

  1. Ly Do129
  2. Specialty average134

Most prescribed

  1. Hydrocodone-Acetaminophen28 claims
  2. Cephalexin16 claims
  3. Megestrol Acetate12 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): 100 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 score100.0
  2. Costnot scored (reweighted)
  3. Promoting interoperabilitynot scored (reweighted)
  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: $1,217.32

42 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Ly Do$1,217.32
  2. Specialty average$1,897.85

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

Bills Medicare through one group practice

  1. Morteza Dowlatshahi M D IncMorgan Hill, CA

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

Ly Viet Do among 735 radiation oncology physician records in California

Ly Viet Do, M.D. is one of 735 radiation oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 57% of them.

  • NPI issued2008 · 57% of these records are older, 38% newer
  • In a Medicare fileYes · 83% of these records are
  • In the CMS Doctors and Clinicians fileYes · 74% of these records are
  • Graduated2003 · median 2005 among the 545 with a school on file
  • Record last updated2011 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Radiation Oncology Physician providers in California

There are 735 radiation oncology physician records in California.

The 8 radiation oncology physician records with the nearest ZIP codes

  1. Morteza Dowlatshahi, M.D.San Jose, CA 951161437112158
  2. Catherine Su, MDSan Jose, CA 951161184719668
  3. Gail Bellman, M.D.San Jose, CA 951281417070723
  4. Constance Bowie, MDSan Jose, CA 951281699831420
  5. Gregory Colburn, MDSan Jose, CA 951281538235056
  6. Elizabeth Dubose, M.D.San Jose, CA 951281124081245
  7. Susan Hiniker, M.D.San Jose, CA 951281275859605
  8. Xingzhe LiSan Jose, CA 951281780116509

Common questions

What is Ly Viet Do, M.D.'s NPI number?

Ly Viet Do, M.D.'s National Provider Identifier (NPI) is 1376706929, issued on Jul 3, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Ly Viet Do, M.D. located?

The NPPES record lists a practice address at 200 Jose Figueres Ave, San Jose, CA, 95116. Phone: (408) 729-4673. Providers update this record themselves, so call before visiting.

How can I verify Ly Viet Do, M.D.'s license?

NPPES lists California license number A88783, 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 Ly Viet Do, M.D. prescribe under Medicare Part D?

In 2024, Ly Viet Do, M.D. had 129 Medicare Part D claims for 53 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.

What is Ly Viet Do, M.D.'s MIPS final score?

The 2023 MIPS final score is 100 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.