NPPES file of Aug 9, 2026

Robert Charles Jacoby, M.D,

Trauma Surgery Physician · Vacaville, CA

Robert Charles Jacoby, M.D, is a trauma surgery physician with a practice address in Vacaville, California, and NPI 1255332227, issued on Aug 2, 2005. Check the license (California A55944, 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
1255332227
Name
Robert Charles Jacoby
Credential
M.D,
Primary taxonomy
Trauma Surgery Physician 2086S0127X
License numbers
A55944 CA
000449044 WA
00049044 WA
Self-reported in NPPES; status is on the state search
Practice location
1 Quality Dr, Vacaville, CA 95688
Phone
(707) 624-2810
Enumerated
Aug 2, 2005
Record last updated
Feb 11, 2022
Medicare enrollment
Enrolled (PECOS I20090113000866); accepts Medicare assignment
Medical or professional school
University Of California, Irvine, California College Of Medicine, 1994
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 Robert Charles Jacoby in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A55944    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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69% fewer Medicare Part D claims than the average trauma surgery physician in 2024

15 Medicare Part D claims for 11 beneficiaries, against an average of 48 among the 447 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 12 claims were for opioids.

  1. Robert Jacoby15
  2. Specialty average48

Most prescribed

  1. Oxycodone Hcl12 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. Permanente Medical Group IncVacaville, CA

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

Trauma Surgery Physician providers in California

There are 146 trauma surgery physician records in California.

All 146 in California → Every provider in Vacaville →

Other trauma surgery physician records in California

  1. Amir Amiri, M.D.Sacramento, CA1184605644
  2. Anthony Anagnostou, MDEureka, CA1427450568
  3. John Anderson, M.D.Sacramento, CA1184607921
  4. Zane Ashman, M.D.Loma Linda, CA1891137915
  5. Uma Bagga, M.D.Orange, CA1710207840
  6. Naveen BalanOakland, CA1669979134
  7. Shana Ballow, DOFresno, CA1275821936
  8. William Bandy, MDChico, CA1629080445
  9. Vishal Bansal, M.D.San Diego, CA1194889410
  10. Cristobal Barrios, MDOrange, CA1164624839

Common questions

What is Robert Charles Jacoby, M.D,'s NPI number?

Robert Charles Jacoby, M.D,'s National Provider Identifier (NPI) is 1255332227, issued on Aug 2, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Robert Charles Jacoby, M.D, located?

The NPPES record lists a practice address at 1 Quality Dr, Vacaville, CA, 95688. Phone: (707) 624-2810. Providers update this record themselves, so call before visiting.

How can I verify Robert Charles Jacoby, M.D,'s license?

NPPES lists California license number A55944, 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 Robert Charles Jacoby, M.D, prescribe under Medicare Part D?

In 2024, Robert Charles Jacoby, M.D, had 15 Medicare Part D claims for 11 beneficiaries; the average among trauma surgery physician prescribers was 48. 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.