NPPES file of Aug 9, 2026

Stephen D. Maxwell, M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Roseville, CA

Stephen D. Maxwell, M.D. is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Roseville, California, and NPI 1043223936, issued on Aug 14, 2006. Check the license (California A78656, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1043223936
Name
Stephen D. Maxwell
Credential
M.D.
Primary taxonomy
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
License number
A78656 CA
Self-reported in NPPES; status is on the state search
Practice location
Three Medical Plaza Drive, Roseville, CA 95661
Phone
(916) 773-8750
Enumerated
Aug 14, 2006
Record last updated
May 24, 2012 (not updated in 14 years: call before relying on the address or phone)
Fax
(916) 773-8751
Medicare enrollment
Enrolled (PECOS I20040727001034); accepts Medicare assignment
Medical or professional school
University Of Missouri, Columbia School Of Medicine, 1995
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at Three Medical Plaza Drive

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Afshin Arya, M.D.Internal Medicine Physician1548230287

Verify Stephen D. Maxwell in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A78656
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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18% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024

83 Medicare Part D claims for 50 beneficiaries, against an average of 101 among the 2,587 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 48 claims were for opioids.

  1. Stephen Maxwell83
  2. Specialty average101

Most prescribed

  1. Oxycodone Hcl45 claims
  2. Gabapentin17 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

  1. Sutter Valley Medical FoundationRoseville, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Stephen D. Maxwell among 634 thoracic surgery (cardiothoracic vascular surgery) physician records in California

Stephen D. Maxwell, M.D. 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 fileYes · 64% of these records are
  • Graduated1995 · median 1997 among the 408 with a school on file
  • Record last updated2012 · 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.

The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes

  1. Sterling Humphrey, MDRoseville, CA 956611033346465
  2. G. Jeffrey Smith, MDRoseville, CA 956611750431565
  3. Timothy MullinDavis, CA 956181679406896
  4. Larry Cardoza, MDCarmichael, CA 956081790721322
  5. Trevor Williams, M.D.Carmichael, CA 956081528294436
  6. Aaron Healy, M.D.Sacramento, CA 958161205153921
  7. Michael Ingram, MDSacramento, CA 958161699773788
  8. Robert Kincade, MDSacramento, CA 958161477551638

Common questions

What is Stephen D. Maxwell, M.D.'s NPI number?

Stephen D. Maxwell, M.D.'s National Provider Identifier (NPI) is 1043223936, issued on Aug 14, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Stephen D. Maxwell, M.D. located?

The NPPES record lists a practice address at Three Medical Plaza Drive, Roseville, CA, 95661. Phone: (916) 773-8750. Providers update this record themselves, so call before visiting.

How can I verify Stephen D. Maxwell, M.D.'s license?

NPPES lists California license number A78656, 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 Stephen D. Maxwell, M.D. prescribe under Medicare Part D?

In 2024, Stephen D. Maxwell, M.D. had 83 Medicare Part D claims for 50 beneficiaries; 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.