Carol A. Buchanan, OD
Optometrist · Brentwood, CA
Carol A. Buchanan, OD is an optometrist with a practice address in Brentwood, California, and NPI 1336153741, issued on Jul 28, 2006. Check the license (California OPT 8323, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Carol A. Buchanan
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License number
- OPT 8323 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8440 Brentwood Blvd Ste F, Brentwood, CA 94513
- Phone
- (925) 634-0303
- Enumerated
- Jul 28, 2006
- Record last updated
- Jul 12, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (925) 634-0338
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Also registered at 8440 Brentwood Blvd Ste F
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ashley Darnell-Sakata, O.D.Optometrist1376923037
Verify Carol A. Buchanan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license OPT 8323Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% fewer Medicare Part D claims than the average optometrist in 2024
113 Medicare Part D claims for 30 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 50% of claims.
Most prescribed
- Latanoprost59 claims
- Timolol Maleate27 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: $49.70
2 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. The 34,453 providers of this specialty with any payment received $769.99 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.
Carol A. Buchanan among 8,308 optometrist records in California
Carol A. Buchanan, OD is one of 8,308 optometrist 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 66% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 43% of these records are
- Record last updated2021 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 optometrist records list a practice address in Brentwood
They are 11 of the 1,212 NPPES records with a practice address in Brentwood, and 8,308 optometrist records in California.
All 8,308 in California → Every provider in Brentwood → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Poonam Bains, O.D.Brentwood, CA 945131336539576
- Matthew Bronge, O.D.Brentwood, CA 945131689623738
- Ashley Darnell-Sakata, O.D.Brentwood, CA 945131376923037
- Mary Leong, O.D.Brentwood, CA 945131003968249
- Barbara Mostardi, ODBrentwood, CA 945131689688095
- Winson Ong, O.D.Brentwood, CA 945131821132143
- Joyce Roberts-Evans, O.D.Brentwood, CA 945131831213990
- Ingrid Stevens-Farinas, O.D.Brentwood, CA 945131841317344
Common questions
What is Carol A. Buchanan, OD's NPI number?
Carol A. Buchanan, OD's National Provider Identifier (NPI) is 1336153741, issued on Jul 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Carol A. Buchanan, OD located?
The NPPES record lists a practice address at 8440 Brentwood Blvd Ste F, Brentwood, CA, 94513. Phone: (925) 634-0303. Providers update this record themselves, so call before visiting.
How can I verify Carol A. Buchanan, OD's license?
NPPES lists California license number OPT 8323, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Carol A. Buchanan, OD prescribe under Medicare Part D?
In 2024, Carol A. Buchanan, OD had 113 Medicare Part D claims for 30 beneficiaries; the average among optometrist prescribers was 277. 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.