NPPES file of Aug 9, 2026

Karen G. Duderstadt, NP

Ambulatory Care Registered Nurse · San Francisco, CA

Karen G. Duderstadt, NP is an ambulatory care registered nurse with a practice address in San Francisco, California, and NPI 1144347519, issued on Mar 23, 2007. Check the license (California RN229710, 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
1144347519
Name
Karen G. Duderstadt
Credential
NP
Primary taxonomy
Ambulatory Care Registered Nurse 163WP2201X
License numbers
RN229710 CA
NPF3424 CA
Self-reported in NPPES; status is on the state search
Practice location
1001 Potrero Ave # 6M, San Francisco, CA 94110
Phone
(415) 206-5908
Enumerated
Mar 23, 2007
Record last updated
Sep 11, 2025
Fax
(415) 753-2161
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 ambulatory care registered nurse records → All 940 in California → Look up another NPI →

Verify Karen G. Duderstadt 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 RN229710    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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Industry payments in 2024: $233.89

2 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 26 providers of this specialty with any payment received $1,609.94 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Karen Duderstadt$233.89
  2. Specialty average$1,609.94

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

Karen G. Duderstadt among 940 ambulatory care registered nurse records in California

Karen G. Duderstadt, NP is one of 940 ambulatory care registered nurse records with a practice address in California. 2% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than under 1% of them.

  • NPI issued2007 · under 1% of these records are older, 97% newer
  • In a Medicare fileYes · 2% of these records are
  • In the CMS Doctors and Clinicians fileNo · under 1% of these records are
  • Record last updated2025 · 44% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 163WP2201X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Ambulatory Care Registered Nurse providers in California

There are 940 ambulatory care registered nurse records in California.

All 940 in California → Every provider in San Francisco → Ambulatory Care Registered Nurse nationwide →

The 8 ambulatory care registered nurse records with the nearest ZIP codes

  1. Rosemary De Perez, NP MSNSan Francisco, CA 941101114128386
  2. Irene Friedman, RNSan Francisco, CA 941101720735871
  3. Marian Kerbleski, RNSan Francisco, CA 941101104176841
  4. Susan Koehler, NP MSNSan Francisco, CA 941101700918737
  5. Terrence Marcotte, NP MSNSan Francisco, CA 941101952428328
  6. Andrea Raider, NPSan Francisco, CA 941101013136332
  7. Sally Thresher, NP MSNSan Francisco, CA 941101568585883
  8. Christina Crotwell, R/NSan Francisco, CA 941151841542602

Common questions

What is Karen G. Duderstadt, NP's NPI number?

Karen G. Duderstadt, NP's National Provider Identifier (NPI) is 1144347519, issued on Mar 23, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Karen G. Duderstadt, NP located?

The NPPES record lists a practice address at 1001 Potrero Ave # 6M, San Francisco, CA, 94110. Phone: (415) 206-5908. Providers update this record themselves, so call before visiting.

How can I verify Karen G. Duderstadt, NP's license?

NPPES lists California license number RN229710, 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. 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.