Michael J. Choi, MD
Urology Physician · Walnut Creek, CA
Michael J. Choi, MD is a urology physician with a practice address in Walnut Creek, California, and NPI 1215015797, issued on Nov 1, 2006. Check the license (California A87594, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael J. Choi
- Credential
- MD
- Primary taxonomy
- Urology Physician 208800000X
- License number
- A87594 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1425 S Main St, Walnut Creek, CA 94596
- Phone
- (925) 295-4000
- Enumerated
- Nov 1, 2006
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20081107000490); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest urology physician records → All 1,524 in California → Look up another NPI →
Also registered at 1425 S Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Derek Ailes, M.D.Emergency Medical Services (Emergency Medicine) Physician1992001804
Verify Michael J. Choi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A87594Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% fewer Medicare Part D claims than the average urology physician in 2024
427 Medicare Part D claims for 185 beneficiaries, against an average of 1,340 among the 10,782 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Finasteride81 claims
- Tamsulosin Hcl80 claims
- Trospium Chloride30 claims
- Ibuprofen29 claims
- Tadalafil24 claims
- Oxycodone Hcl23 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: $833.42
4 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 9,340 providers of this specialty with any payment received $3,800.04 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
- Permanente Medical Group IncSanta Clara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael J. Choi among 1,524 urology physician records in California
Michael J. Choi, MD is one of 1,524 urology physician records with a practice address in California. 82% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 51% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1999 · median 2003 among the 1,049 with a school on file
- Record last updated2021 · 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 208800000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Urology Physician providers in California
There are 1,524 urology physician records in California.
All 1,524 in California → Every provider in Walnut Creek → Urology Physician nationwide →
The 8 urology physician records with the nearest ZIP codes
- Amir Arsanjani, MDWalnut Creek, CA 945961154486793
- Andrew Chen, M.D.Walnut Creek, CA 945961811039480
- Jason Frankel, MDWalnut Creek, CA 945961750729976
- Scot Hagey, MDWalnut Creek, CA 945961215015896
- Gregory Marshall, MDWalnut Creek, CA 945961437237526
- John Oh, MDWalnut Creek, CA 945961649358730
- Raymond Rosenbaum, MDWalnut Creek, CA 945961679651749
- Malcolm Scott, MDWalnut Creek, CA 945961750469854
Common questions
What is Michael J. Choi, MD's NPI number?
Michael J. Choi, MD's National Provider Identifier (NPI) is 1215015797, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael J. Choi, MD located?
The NPPES record lists a practice address at 1425 S Main St, Walnut Creek, CA, 94596. Phone: (925) 295-4000. Providers update this record themselves, so call before visiting.
How can I verify Michael J. Choi, MD's license?
NPPES lists California license number A87594, 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 Michael J. Choi, MD prescribe under Medicare Part D?
In 2024, Michael J. Choi, MD had 427 Medicare Part D claims for 185 beneficiaries; the average among urology physician prescribers was 1,340. 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.