Walailuk Chaiyarat, MD
Hematology & Oncology Physician · Concord, CA
Walailuk Chaiyarat, MD is a hematology & oncology physician with a practice address in Concord, California, and NPI 1811140478, issued on Oct 28, 2008. Check the license (California A117301, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Walailuk Chaiyarat
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A117301 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2571 Park Ave, Concord, CA 94520
- Phone
- (925) 674-2100
- Enumerated
- Oct 28, 2008
- Record last updated
- Jun 11, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110907001490); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 2571 Park Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sudhathi Chichili, M.D.Hematology & Oncology Physician1730394891
- Lesley Martin, M.D.Hematology & Oncology Physician1114900834
- Michael Messer, MDSpecialist1255438206
- Elizabeth Odumakinde, M.D.Hematology & Oncology Physician1952408999
Verify Walailuk Chaiyarat in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A117301Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average hematology & oncology physician in 2024
1,756 Medicare Part D claims for 320 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims. 64 claims were for opioids.
Most prescribed
- Eliquis99 claims
- Gabapentin94 claims
- Levothyroxine Sodium94 claims
- Mirtazapine90 claims
- Pantoprazole Sodium90 claims
- Letrozole88 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): 85.7 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.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,500.29
106 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,560 providers of this specialty with any payment received $7,481.41 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.
Bills Medicare through one group practice
- John Muir Physician NetworkConcord, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Walailuk Chaiyarat among 1,583 hematology & oncology physician records in California
Walailuk Chaiyarat, MD is one of 1,583 hematology & 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 60% of them.
- NPI issued2008 · 60% of these records are older, 34% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2000 · median 2003 among the 1,124 with a school on file
- Record last updated2019 · 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 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Concord → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Sudhathi Chichili, M.D.Concord, CA 945201730394891
- Lesley Martin, M.D.Concord, CA 945201114900834
- Beverly McLeod, MDConcord, CA 945201851465165
- Elizabeth Odumakinde, M.D.Concord, CA 945201952408999
- Esther Catalya, M.D.Pleasant Hill, CA 945231629184148
- Miguel Cerejo, D.O.Pleasant Hill, CA 945231447236344
- Gigi Chen, M.D.Pleasant Hill, CA 945231821073636
- Shoba Kankipati, M.D.Pleasant Hill, CA 945231356392781
Common questions
What is Walailuk Chaiyarat, MD's NPI number?
Walailuk Chaiyarat, MD's National Provider Identifier (NPI) is 1811140478, issued on Oct 28, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Walailuk Chaiyarat, MD located?
The NPPES record lists a practice address at 2571 Park Ave, Concord, CA, 94520. Phone: (925) 674-2100. Providers update this record themselves, so call before visiting.
How can I verify Walailuk Chaiyarat, MD's license?
NPPES lists California license number A117301, 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 Walailuk Chaiyarat, MD prescribe under Medicare Part D?
In 2024, Walailuk Chaiyarat, MD had 1,756 Medicare Part D claims for 320 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Walailuk Chaiyarat, MD's MIPS final score?
The 2023 MIPS final score is 85.7 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.