James C. Macmillan, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Modesto, CA
James C. Macmillan, MD is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Modesto, California, and NPI 1366499584, issued on May 31, 2006. Check the license (California G23487, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James C. Macmillan
- Credential
- MD
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License number
- G23487 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1541 Florida Ave, Modesto, CA 95350
- Phone
- (209) 577-3388
- Enumerated
- May 31, 2006
- Record last updated
- Jul 13, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (209) 523-0764
- Medicaid ID
- ZZZ76734Z CA
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 634 in California → Look up another NPI →
Also registered at 1541 Florida Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James C. Macmillan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G23487Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024
18 Medicare Part D claims, against an average of 101 among the 2,587 providers of this specialty who prescribed in Part D.
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.
James C. Macmillan among 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California
James C. Macmillan, MD is one of 634 thoracic surgery (cardiothoracic vascular 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 10% of them.
- NPI issued2006 · 10% of these records are older, 45% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2011 · 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 208G00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in California
There are 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California.
All 634 in California → Every provider in Modesto → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Zachary Brewer, MDModesto, CA 953501467741975
- John Degraft-Johnson, M.D.,Modesto, CA 953501043472871
- Joe Neal, MDModesto, CA 953501073553954
- Shahroukh Bakhshay, M.D.Merced, CA 953481750421483
- Lit Fung, M.D.Modesto, CA 953551346240264
- Rajaratnam Skantharaja, MDModesto, CA 953551154542298
- Hugh Tobin, MDModesto, CA 953561316987373
- Mehrdad Amirhamzeh, M.D.Manteca, CA 953371174523096
Common questions
What is James C. Macmillan, MD's NPI number?
James C. Macmillan, MD's National Provider Identifier (NPI) is 1366499584, issued on May 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James C. Macmillan, MD located?
The NPPES record lists a practice address at 1541 Florida Ave, Modesto, CA, 95350. Phone: (209) 577-3388. Providers update this record themselves, so call before visiting.
How can I verify James C. Macmillan, MD's license?
NPPES lists California license number G23487, 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 James C. Macmillan, MD prescribe under Medicare Part D?
In 2024, James C. Macmillan, MD had 18 Medicare Part D claims; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 101. 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.