NPPES file of Aug 9, 2026

Thomas Markiewith, P.A.

Surgical Physician Assistant · Walnut Creek, CA

Thomas Markiewith, P.A. is a surgical physician assistant with a practice address in Walnut Creek, California, and NPI 1427086149, issued on Jun 29, 2006. Check the license (California PA13892, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1427086149
Name
Thomas Markiewith
Credential
P.A.
Primary taxonomy
Surgical Physician Assistant 363AS0400X
License number
PA13892 CA
Self-reported in NPPES; status is on the state search
Practice location
2405 Shadelands Dr, Walnut Creek, CA 94598
Phone
(925) 939-8585
Enumerated
Jun 29, 2006
Record last updated
Apr 30, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax
(925) 933-2709
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest surgical physician assistant records → All 1,075 in California → Look up another NPI →

Also registered at 2405 Shadelands Dr

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

  1. Divya Anand, PHYSICAL THERAPISTPhysical Therapist1801989272
  2. David Arakawa, P.T.Orthopedic Physical Therapist1114955820
  3. Kevin Byrne, PASurgical Physician Assistant1306499272
  4. Michael Cadette, PA-CPhysician Assistant1689075236
  5. Leo Calafi, MDOrthopaedic Surgery Physician1720079072
  6. Michael Chang, D.O.Pain Medicine (Physical Medicine & Rehabilitation) Physician1205934262

Verify Thomas Markiewith in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license PA13892    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
Find the California license search

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Thomas Markiewith among 1,075 surgical physician assistant records in California

Thomas Markiewith, P.A. is one of 1,075 surgical physician assistant records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 2% of them.

  • NPI issued2006 · 2% of these records are older, 74% newer
  • In a Medicare fileNo · 79% of these records are
  • In the CMS Doctors and Clinicians fileNo · 60% of these records are
  • Record last updated2008 · 53% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AS0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Surgical Physician Assistant providers in California

There are 1,075 surgical physician assistant records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,075 in California → Every provider in Walnut Creek → Surgical Physician Assistant nationwide →

The 8 surgical physician assistant records with the nearest ZIP codes

  1. David Brand, P.A.Walnut Creek, CA 945981346366556
  2. Brian Costello, PHYSICIAN ASSISTANTWalnut Creek, CA 945981396833257
  3. Bridget Garrehy, P.A.Walnut Creek, CA 945981710250865
  4. Jennifer Hayashi, P.A.Walnut Creek, CA 945981184959033
  5. Mariel Heller-Benson, PA-CWalnut Creek, CA 945981891083408
  6. Patricia Loo, P.A.Walnut Creek, CA 945981083755862
  7. Kevin Lowe, PA-CWalnut Creek, CA 945981659644870
  8. Christine Martinez, P.A.-CWalnut Creek, CA 945981871650523

Common questions

What is Thomas Markiewith, P.A.'s NPI number?

Thomas Markiewith, P.A.'s National Provider Identifier (NPI) is 1427086149, issued on Jun 29, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Thomas Markiewith, P.A. located?

The NPPES record lists a practice address at 2405 Shadelands Dr, Walnut Creek, CA, 94598. Phone: (925) 939-8585. Providers update this record themselves, so call before visiting.

How can I verify Thomas Markiewith, P.A.'s license?

NPPES lists California license number PA13892, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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. 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.