NPPES file of Aug 9, 2026

Zachary Mallon, MD

Orthopaedic Trauma Physician · Vacaville, CA

Zachary Mallon, MD is an orthopaedic trauma physician with a practice address in Vacaville, California, and NPI 1932360427, issued on Jun 18, 2008. Check the license (California A109177, 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
1932360427
Name
Zachary Mallon
Credential
MD
Primary taxonomy
Orthopaedic Trauma Physician 207XX0801X
License number
A109177 CA
Self-reported in NPPES; status is on the state search
Practice location
1 Quality Dr, Vacaville, CA 95688
Phone
(707) 624-4000
Enumerated
Jun 18, 2008
Record last updated
Dec 15, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicaid ID
3972360427 CA
Medicare enrollment
Enrolled (PECOS I20091102000063); accepts Medicare assignment
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 1 Quality Dr

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

  1. Hydee Abaya Ghazaleh, M.D.Internal Medicine Physician1922688464
  2. Jonathan Abaya Ghazaleh, MDInternal Medicine Physician1093395535
  3. Huma Ahmad, D.O.Hospitalist Physician1154587616
  4. Azim Ahmady, MDFamily Medicine Physician1417035916
  5. Lamia Alazzawi, PHARM.D.Pharmacist1407380645
  6. Delaine Alejandro, DOFamily Medicine Physician1487816294

Verify Zachary Mallon in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A109177
    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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50% fewer Medicare Part D claims than the average orthopaedic trauma physician in 2024

75 Medicare Part D claims for 55 beneficiaries, against an average of 151 among the 627 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 57 claims were for opioids.

  1. Zachary Mallon75
  2. Specialty average151

Most prescribed

  1. Oxycodone Hcl54 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.

Industry payments in 2024: $5,634.63

8 payments; by number, the most common kind was travel and lodging; the largest payer was Synthes GmbH. The 722 providers of this specialty with any payment received $15,814.30 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Zachary Mallon$5,635
  2. Specialty average$15,814

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Permanente Medical Group IncVacaville, CA

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

Zachary Mallon among 114 orthopaedic trauma physician records in California

Zachary Mallon, MD is one of 114 orthopaedic trauma physician records with a practice address in California. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 38% of them.

  • NPI issued2008 · 38% of these records are older, 53% newer
  • In a Medicare fileYes · 89% of these records are
  • In the CMS Doctors and Clinicians fileYes · 83% of these records are
  • Graduated2008 · median 2009 among the 95 with a school on file
  • Record last updated2021 · 41% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XX0801X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Orthopaedic Trauma Physician providers in California

There are 114 orthopaedic trauma physician records in California.

The 8 orthopaedic trauma physician records with the nearest ZIP codes

  1. Margaret HankinsVacaville, CA 956881508397985
  2. Daniel Switlick, M.D.Roseville, CA 956611548378466
  3. Mustafa Alkhouli, DOCarmichael, CA 956081306474945
  4. Paul Gregory, M.D.Carmichael, CA 956081427166453
  5. Bo HeCarmichael, CA 956081770903320
  6. David IvanovCarmichael, CA 956081356962781
  7. Ethan Lea, M.D.Carmichael, CA 956081760645444
  8. Rafael Neiman, M.D.Carmichael, CA 956081194711879

Common questions

What is Zachary Mallon, MD's NPI number?

Zachary Mallon, MD's National Provider Identifier (NPI) is 1932360427, issued on Jun 18, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Zachary Mallon, MD located?

The NPPES record lists a practice address at 1 Quality Dr, Vacaville, CA, 95688. Phone: (707) 624-4000. Providers update this record themselves, so call before visiting.

How can I verify Zachary Mallon, MD's license?

NPPES lists California license number A109177, 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 Zachary Mallon, MD prescribe under Medicare Part D?

In 2024, Zachary Mallon, MD had 75 Medicare Part D claims for 55 beneficiaries; the average among orthopaedic trauma physician prescribers was 151. 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.