Diane B. Chandler, D.O.
Family Medicine Physician · Concord, CA
Diane B. Chandler, D.O. is a family medicine physician with a practice address in Concord, California, and NPI 1760466312, issued on Dec 6, 2005. Check the license (California 20A9124, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Diane B. Chandler
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A9124 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5161 Clayton RD, Concord, CA 94521
- Phone
- (925) 609-8282
- Enumerated
- Dec 6, 2005
- Record last updated
- Jun 16, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (925) 609-8826
- Medicare enrollment
- Enrolled (PECOS I20050909000708); accepts Medicare assignment
- Medical or professional school
- College Of Physicians And Surgeons (California), 2002
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 5161 Clayton RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Michael Varon, M.D.Family Medicine Physician1386662641
Verify Diane B. Chandler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A9124Check 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% more Medicare Part D claims than the average family medicine physician in 2024
3,605 Medicare Part D claims for 399 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 86 claims were for opioids.
Most prescribed
- Atorvastatin Calcium275 claims
- Amlodipine Besylate208 claims
- Levothyroxine Sodium200 claims
- Rosuvastatin Calcium157 claims
- Lisinopril119 claims
- Losartan Potassium88 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.
Industry payments in 2024: $20.23
1 payment: food and beverage; the largest payer was Abbott Laboratories. The 55,478 providers of this specialty with any payment received $902.55 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).
Diane B. Chandler among 17,133 family medicine physician records in California
Diane B. Chandler, D.O. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2002 · median 2005 among the 10,652 with a school on file
- Record last updated2015 · 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 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
38 family medicine physician records list a practice address in Concord
They are 38 of the 9,328 NPPES records with a practice address in Concord, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Concord → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Anthony Ryan Aguirre, MDConcord, CA 945211386907624
- Jaskaran Khela, DOConcord, CA 945211073074944
- Charles Renner, M.D.Concord, CA 945211669439733
- Elisabeth Renner, M.D.Concord, CA 945211275642910
- Tanya Threewitt, M.D.Concord, CA 945211699708610
- Michael Varon, M.D.Concord, CA 945211386662641
- Kristina Carpenter, D.O.Concord, CA 945201952741985
- Rachelle Hanft, MDConcord, CA 945201437306313
Common questions
What is Diane B. Chandler, D.O.'s NPI number?
Diane B. Chandler, D.O.'s National Provider Identifier (NPI) is 1760466312, issued on Dec 6, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Diane B. Chandler, D.O. located?
The NPPES record lists a practice address at 5161 Clayton RD, Concord, CA, 94521. Phone: (925) 609-8282. Providers update this record themselves, so call before visiting.
How can I verify Diane B. Chandler, D.O.'s license?
NPPES lists California license number 20A9124, 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 Diane B. Chandler, D.O. prescribe under Medicare Part D?
In 2024, Diane B. Chandler, D.O. had 3,605 Medicare Part D claims for 399 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.