Michael Lee Ditmars, MD
Surgery Physician · Antioch, CA
Michael Lee Ditmars, MD is a surgery physician with a practice address in Antioch, California, and NPI 1265440101, issued on Aug 4, 2006. Check the license (California G080207, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Lee Ditmars
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- G080207 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3903 Lone Tree Way, Antioch, CA 94509
- Phone
- (925) 757-0800
- Enumerated
- Aug 4, 2006
- Record last updated
- Dec 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (925) 757-2160
- Medicare enrollment
- Enrolled (PECOS I20040907000508); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1993
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 3903 Lone Tree Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jenny Jew, M.D.Gastroenterology Physician1356504476
- Hamidreza Khonsari, M.D.Family Medicine Physician1306874714
- Sumner Seibert, M.D.Orthopaedic Surgery Physician1255350534
- Lauren Shirvanee, D.O.General Practice Physician1033447222
- Dennis Zai, MDGastroenterology Physician1740253350
Verify Michael Lee Ditmars in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G080207Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average surgery physician in 2024
102 Medicare Part D claims for 59 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 54 claims were for opioids.
Most prescribed
- Meloxicam34 claims
- Tramadol Hcl29 claims
- Hydrocodone-Acetaminophen21 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
- Southern California Permanente Medical GroupSan Marcos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Lee Ditmars among 3,118 surgery physician records in California
Michael Lee Ditmars, MD is one of 3,118 surgery physician records with a practice address in California. 75% 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, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1993 · median 2003 among the 1,901 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 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in Antioch → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Joseph Brandel, M.D.Antioch, CA 945091770756884
- Phillip Polido, M.DAntioch, CA 945091245320001
- Hamid RassaiAntioch, CA 945091013013218
- Mary Burchell, MDAlamo, CA 945071912071143
- Bruce LockeAlamo, CA 945071992243802
- Donald Palmer, MDAlamo, CA 945071952489023
- Roberto Celada, M.D.Alameda, CA 945011336302959
- Pamela McBride, MDAlameda, CA 945011972558575
Common questions
What is Michael Lee Ditmars, MD's NPI number?
Michael Lee Ditmars, MD's National Provider Identifier (NPI) is 1265440101, issued on Aug 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Lee Ditmars, MD located?
The NPPES record lists a practice address at 3903 Lone Tree Way, Antioch, CA, 94509. Phone: (925) 757-0800. Providers update this record themselves, so call before visiting.
How can I verify Michael Lee Ditmars, MD's license?
NPPES lists California license number G080207, 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 Lee Ditmars, MD prescribe under Medicare Part D?
In 2024, Michael Lee Ditmars, MD had 102 Medicare Part D claims for 59 beneficiaries; the average among surgery physician prescribers was 147. 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.