Mark Daniel Bailey, MD
Ophthalmology Physician · San Leandro, CA
Mark Daniel Bailey, MD is an ophthalmology physician with a practice address in San Leandro, California, and NPI 1417530270, issued on Apr 29, 2021. Check the license (California A200912, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Daniel Bailey
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A200912 CA
Self-reported in NPPES; status is on the state search - Practice location
- 15051 Hesperian Blvd Ste A, San Leandro, CA 94578
- Phone
- (510) 276-1212
- Enumerated
- Apr 29, 2021
- Record last updated
- May 27, 2025
- Medicare enrollment
- Enrolled (PECOS I20250730001402); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2021
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 15051 Hesperian Blvd Ste A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nisreen Kothari, MDOphthalmology Physician1730445644
- Preethi Thiagarajan, O.D., PH.D., FAAOOptometrist1841851045
Verify Mark Daniel Bailey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A200912Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average ophthalmology physician in 2024
102 Medicare Part D claims for 38 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Latanoprost28 claims
- Brimonidine Tartrate20 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.
Bills Medicare through one group practice
- V. Nicholas Batra M.D. Inc.San Leandro, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Daniel Bailey among 2,899 ophthalmology physician records in California
Mark Daniel Bailey, MD is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 96% of them.
- NPI issued2021 · 96% of these records are older, 2% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2021 · median 2001 among the 1,907 with a school on file
- Record last updated2025 · 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 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in San Leandro → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Vineet Batra, M.D.San Leandro, CA 945781457432379
- Rose Kiprov, M.D.San Leandro, CA 945781881784544
- Nisreen Kothari, MDSan Leandro, CA 945781730445644
- Rominder Momi, M.D.San Leandro, CA 945781740439371
- Janice Moyer, M.DSan Leandro, CA 945781265510408
- Chirag Patel, M.D.San Leandro, CA 945771922269760
- Julie Perry, MDSaint Helena, CA 945741083688659
- Aimee Edell, M.D.San Ramon, CA 945831740508506
Common questions
What is Mark Daniel Bailey, MD's NPI number?
Mark Daniel Bailey, MD's National Provider Identifier (NPI) is 1417530270, issued on Apr 29, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Mark Daniel Bailey, MD located?
The NPPES record lists a practice address at 15051 Hesperian Blvd Ste A, San Leandro, CA, 94578. Phone: (510) 276-1212. Providers update this record themselves, so call before visiting.
How can I verify Mark Daniel Bailey, MD's license?
NPPES lists California license number A200912, 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 Mark Daniel Bailey, MD prescribe under Medicare Part D?
In 2024, Mark Daniel Bailey, MD had 102 Medicare Part D claims for 38 beneficiaries; the average among ophthalmology physician prescribers was 1,518. 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.