NPPES file of Aug 9, 2026

Mark Atarius Sandquist, M.D.

Family Medicine Physician · Santa Maria, CA

Mark Atarius Sandquist, M.D. is a family medicine physician with a practice address in Santa Maria, California, and NPI 1194757880, issued on Jul 6, 2006. Check the license (California G86739, 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
1194757880
Name
Mark Atarius Sandquist
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
G86739 CA
Self-reported in NPPES; status is on the state search
Practice location
117 W Bunny Ave, Santa Maria, CA 93458
Phone
(805) 739-3890
Enumerated
Jul 6, 2006
Record last updated
Feb 19, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax
(805) 347-7697
Medicaid ID
00G867390 CA
Medicare enrollment
Enrolled (PECOS I20080212000546); accepts Medicare assignment
Medical or professional school
University Of Colorado School Of Medicine, Denver, 1987
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 117 W Bunny Ave

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

  1. Leticia Burdumy, R..NDiabetes Educator Registered Nurse1306022132
  2. Jeremy Espino, PAPhysician Assistant1689854044
  3. Gabriel Foo, M.D.Internal Medicine Physician1306875539
  4. Paul Lussier, D.O.Internal Medicine Physician1013949791
  5. John Newlander, M.D.Family Medicine Physician1609805845
  6. Ijeoma Ofiaeli, M.D.Internal Medicine Physician1932138179

Verify Mark Atarius Sandquist in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G86739    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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97% fewer Medicare Part D claims than the average family medicine physician in 2024

113 Medicare Part D claims for 61 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.

  1. Mark Sandquist113
  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 one group practice

  1. Central Coast IN-Patient Consultants IncSanta Maria, CA

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

79 family medicine physician records list a practice address in Santa Maria

They are 79 of the 3,047 NPPES records with a practice address in Santa Maria, and 17,133 family medicine physician records in California.

All 79 in Santa Maria → All 17,133 in California → Every provider in Santa Maria →

Other family medicine physician records in California

  1. Omer Aba-Omer, MDSanta Monica, CA1649702093
  2. Michelle Ababa, MDWilmington, CA1710922513
  3. Anna Tzeitel Abalos, MDRoseville, CA1720200017
  4. Adan Abarca, MDAnaheim, CA1760553689
  5. Vanessa Abarca, DOVentura, CA1952040859
  6. Lorraine Abate, M.D.Sacramento, CA1104840008
  7. Robert Abatecola, MDCastro Valley, CA1669551719
  8. Romeo Abaya, M.D.Cottonwood, CA1598053506
  9. Effiem Abbah, MD, MPHSan Francisco, CA1821185133
  10. Khuzeman Abbasi, MDSanta Rosa, CA1841979952

Common questions

What is Mark Atarius Sandquist, M.D.'s NPI number?

Mark Atarius Sandquist, M.D.'s National Provider Identifier (NPI) is 1194757880, issued on Jul 6, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Mark Atarius Sandquist, M.D. located?

The NPPES record lists a practice address at 117 W Bunny Ave, Santa Maria, CA, 93458. Phone: (805) 739-3890. Providers update this record themselves, so call before visiting.

How can I verify Mark Atarius Sandquist, M.D.'s license?

NPPES lists California license number G86739, 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 Atarius Sandquist, M.D. prescribe under Medicare Part D?

In 2024, Mark Atarius Sandquist, M.D. had 113 Medicare Part D claims for 61 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.