NPPES file of Aug 9, 2026

David Scot Zimmerman, M.D.

Family Medicine Physician · Vista, CA

David Scot Zimmerman, M.D. is a family medicine physician with a practice address in Vista, California, and NPI 1255357307, issued on Jul 14, 2006. Check the license (California A44517, 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
1255357307
Name
David Scot Zimmerman
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
A44517 CA
Self-reported in NPPES; status is on the state search
Practice location
145 Thunder Dr, Vista, CA 92083
Phone
(760) 941-9002
Enumerated
Jul 14, 2006
Record last updated
Nov 30, 2025
Medicare enrollment
Enrolled (PECOS I20120323000321); 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 145 Thunder Dr

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

  1. Talia Adams, PA-CPhysician Assistant1790166858
  2. Robert Barron, MDFamily Medicine Physician1477626984
  3. Leo Best, PA-CPhysician Assistant1376723437
  4. Lily Caesar, P.A.Physician Assistant1518184266
  5. Erinn Degracia, FNPFamily Nurse Practitioner1043729825
  6. Sean Easton, PAPhysician Assistant1790284131

Verify David Scot Zimmerman in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A44517
    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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38% fewer Medicare Part D claims than the average family medicine physician in 2024

2,199 Medicare Part D claims for 550 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 37 claims were for opioids.

  1. David Zimmerman2,199
  2. Specialty average3,544

Most prescribed

  1. Atorvastatin Calcium166 claims
  2. Levothyroxine Sodium136 claims
  3. Losartan Potassium121 claims
  4. Amlodipine Besylate88 claims
  5. Lisinopril78 claims
  6. Omeprazole70 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. Beaver Medical Group P CVista, CA

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

David Scot Zimmerman among 17,133 family medicine physician records in California

David Scot Zimmerman, 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
  • Graduated1980 · median 2005 among the 10,652 with a school on file
  • Record last updated2025 · 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).

75 family medicine physician records list a practice address in Vista

They are 75 of the 2,017 NPPES records with a practice address in Vista, and 17,133 family medicine physician records in California.

The 8 family medicine physician records with the nearest ZIP codes

  1. Hala Amr, MDVista, CA 920831891700258
  2. Joseph Castrejon, MDVista, CA 920831568486710
  3. Deryien Chen, MDVista, CA 920831902820103
  4. Jonathan Haynes, MDVista, CA 920831255397063
  5. Louis Hogrefe, MDVista, CA 920831841205218
  6. Melissa Hurd, M.D.Vista, CA 920831487643698
  7. Ken Iwaoka, MDVista, CA 920831346263670
  8. Amad Kadry, M.D.Vista, CA 920831396855235

Common questions

What is David Scot Zimmerman, M.D.'s NPI number?

David Scot Zimmerman, M.D.'s National Provider Identifier (NPI) is 1255357307, issued on Jul 14, 2006. An NPI identifies a provider in billing; it is not a license.

Where is David Scot Zimmerman, M.D. located?

The NPPES record lists a practice address at 145 Thunder Dr, Vista, CA, 92083. Phone: (760) 941-9002. Providers update this record themselves, so call before visiting.

How can I verify David Scot Zimmerman, M.D.'s license?

NPPES lists California license number A44517, 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 David Scot Zimmerman, M.D. prescribe under Medicare Part D?

In 2024, David Scot Zimmerman, M.D. had 2,199 Medicare Part D claims for 550 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.