NPPES file of Aug 9, 2026

Steven H. Segerstrom, M.D

Family Medicine Physician · Marysville, CA

Steven H. Segerstrom, M.D is a family medicine physician with a practice address in Marysville, California, and NPI 1205876240, issued on Jun 7, 2006. Check the license (California G56784, 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
1205876240
Name
Steven H. Segerstrom
Credential
M.D
Primary taxonomy
Family Medicine Physician 207Q00000X
License numbers
G56784 CA
16310 NV
Self-reported in NPPES; status is on the state search
Practice location
726 4TH Street, Marysville, CA 94901
Phone
(530) 749-4300
Enumerated
Jun 7, 2006
Record last updated
Jul 23, 2024
Medicare enrollment
Enrolled (PECOS I20061030000275); accepts Medicare assignment
Medical or professional school
University Of California, San Francisco School Of Medicine, 1984
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 726 4TH Street

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

  1. Mark Agness, M.D.Family Medicine Physician1609816743
  2. Pamela Fallo, C.F.N.PRegistered Nurse1689612921
  3. Katherine Kelly, N.PFamily Nurse Practitioner1679517205
  4. Robert Martin, M.DEmergency Medicine Physician1205876208
  5. Robert Olson, P.A-CPhysician Assistant1932147287
  6. Kulwinder Singh, M.DEmergency Medicine Physician1396782934

Verify Steven H. Segerstrom in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G56784
    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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99% fewer Medicare Part D claims than the average family medicine physician in 2024

35 Medicare Part D claims for 21 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.

  1. Steven Segerstrom35
  2. Specialty average3,544

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 2 group practices

  1. Mt Grant General HospitalHawthorne, NV
  2. Vituity-Nevada Medical Services Koury And Partners PCIncline Village, NV

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

Steven H. Segerstrom among 17,133 family medicine physician records in California

Steven H. Segerstrom, M.D is one of 17,133 family medicine physician records with a practice address in California. 81% 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, 59% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated1984 · median 2005 among the 10,652 with a school on file
  • Record last updated2024 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Family Medicine Physician providers in California

There are 17,133 family medicine physician records in California.

The 8 family medicine physician records with the nearest ZIP codes

  1. Mark Agness, M.D.Marysville, CA 949011609816743
  2. Michael Frumkin, MDSan Rafael, CA 949011154382158
  3. Darell Hawley, DOSan Rafael, CA 949011295484962
  4. Iver Juster, MDSan Rafael, CA 949011073437026
  5. Kenneth Lossing, DOSan Rafael, CA 949011891884243
  6. Suzanna Sherer, NPSan Rafael, CA 949011336630334
  7. Allison Slater, MD, MBESan Rafael, CA 949011790362085
  8. David Tully-Smith, M.D.San Rafael, CA 949011598890287

Common questions

What is Steven H. Segerstrom, M.D's NPI number?

Steven H. Segerstrom, M.D's National Provider Identifier (NPI) is 1205876240, issued on Jun 7, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Steven H. Segerstrom, M.D located?

The NPPES record lists a practice address at 726 4TH Street, Marysville, CA, 94901. Phone: (530) 749-4300. Providers update this record themselves, so call before visiting.

How can I verify Steven H. Segerstrom, M.D's license?

NPPES lists California license number G56784, 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 Steven H. Segerstrom, M.D prescribe under Medicare Part D?

In 2024, Steven H. Segerstrom, M.D had 35 Medicare Part D claims for 21 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.