NPPES file of Aug 9, 2026

Karen Loraine Weiss, NP

Family Nurse Practitioner · Martinez, CA

Karen Loraine Weiss, NP is a family nurse practitioner with a practice address in Martinez, California, and NPI 1720328487, issued on Feb 18, 2013. Check the license (California 22746, as entered in NPPES) with the California board that licenses this profession; 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
1720328487
Name
Karen Loraine Weiss
Credential
NP
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
22746 CA
Self-reported in NPPES; status is on the state search
Practice location
1146 Delacy Ave, Martinez, CA 94553
Phone
(925) 313-9353
Enumerated
Feb 18, 2013
Record last updated
Feb 18, 2013 (not updated in 13 years: call before relying on the address or phone)
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 family nurse practitioner records → All 16,966 in California → Look up another NPI →

Verify Karen Loraine Weiss 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 22746    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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72% more Medicare Part D claims than the average family nurse practitioner in 2024

2,246 Medicare Part D claims for 439 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 143 claims were for opioids.

  1. Karen Weiss2,246
  2. Specialty average1,305

Most prescribed

  1. Atorvastatin Calcium116 claims
  2. Omeprazole109 claims
  3. Amlodipine Besylate90 claims
  4. Albuterol Sulfate Hfa75 claims
  5. Levothyroxine Sodium71 claims
  6. Lisinopril57 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.

Karen Loraine Weiss among 16,966 family nurse practitioner records in California

Karen Loraine Weiss, NP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 24% of them.

  • NPI issued2013 · 24% of these records are older, 73% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileNo · 40% of these records are
  • Record last updated2013 · 42% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

46 family nurse practitioner records list a practice address in Martinez

They are 46 of the 1,816 NPPES records with a practice address in Martinez, and 16,966 family nurse practitioner records in California.

All 16,966 in California → Every provider in Martinez → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Ruben Caballero, NPMartinez, CA 945531891870879
  2. Larry Cooperider, NURSE PRACTITIONERMartinez, CA 945531780676247
  3. Jo ElliffMartinez, CA 945531154498517
  4. Cynthia Hellman-Wylie, MSN, FNPMartinez, CA 945531093793127
  5. Phyllis Howard, NPMartinez, CA 945531093885998
  6. Laura Keels, F.N.P.Martinez, CA 945531619925286
  7. Marilyn Kerkhoff, NPMartinez, CA 945531336123090
  8. Laura Miller, NPMartinez, CA 945531801979570

Common questions

What is Karen Loraine Weiss, NP's NPI number?

Karen Loraine Weiss, NP's National Provider Identifier (NPI) is 1720328487, issued on Feb 18, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Karen Loraine Weiss, NP located?

The NPPES record lists a practice address at 1146 Delacy Ave, Martinez, CA, 94553. Phone: (925) 313-9353. Providers update this record themselves, so call before visiting.

How can I verify Karen Loraine Weiss, NP's license?

NPPES lists California license number 22746, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Karen Loraine Weiss, NP prescribe under Medicare Part D?

In 2024, Karen Loraine Weiss, NP had 2,246 Medicare Part D claims for 439 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.