NPPES file of Aug 9, 2026

Caren Marie Pfieffer, NP-C

Family Nurse Practitioner · Palo Alto, CA

Caren Marie Pfieffer, NP-C is a family nurse practitioner with a practice address in Palo Alto, California, and NPI 1124469085, issued on Jul 8, 2013. Check the license (California 95008587, 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
1124469085
Name
Caren Marie Pfieffer
Credential
NP-C
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License numbers
95008587 CA
AP5092 AZ
LG-0012577 DE
5019313 NC
Self-reported in NPPES; status is on the state search
Practice location
195 Page Mill RD Ste 103, Palo Alto, CA 94306
Phone
(888) 731-8994
Enumerated
Jul 8, 2013
Record last updated
May 15, 2026
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.
Download card Updates feed

Also registered at 195 Page Mill RD Ste 103

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

  1. Christine Ackerman, NPNurse Practitioner1659748747
  2. Kelsey Adams, MSN, R.N., F.N.P.Family Nurse Practitioner1295069516
  3. Ellen Allen, FNPNurse Practitioner1457059271
  4. Samantha Allnutt, FNP-CFamily Nurse Practitioner1487176046
  5. Katrina Armstrong, WHNPWomen's Health Nurse Practitioner1457975849
  6. Sonia Bajwa-DulaiInternal Medicine Physician1336429711

Verify Caren Marie Pfieffer 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 95008587    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

95% fewer Medicare Part D claims than the average family nurse practitioner in 2024

62 Medicare Part D claims for 14 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.

  1. Caren Pfieffer62
  2. Specialty average1,305

Most prescribed

  1. Levothyroxine Sodium12 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.

147 family nurse practitioner records list a practice address in Palo Alto

They are 147 of the 7,617 NPPES records with a practice address in Palo Alto, and 16,966 family nurse practitioner records in California.

All 147 in Palo Alto → All 16,966 in California → Every provider in Palo Alto →

Other family nurse practitioner records in California

  1. Danielle Aaroe, FAMILY NURSE PRACTITOroville, CA1750767083
  2. Joshua AaronMission Hills, CA1477291805
  3. Orly Aaron, NPSan Francisco, CA1376912451
  4. Paris Gilbert Russ AaronSacramento, CA1871079111
  5. Tiffanne Aaronsen, FNPIndio, CA1568191807
  6. Alvin Joseph Abad, FNP-CSan Francisco, CA1154919306
  7. Frances Abad, FNPLos Angeles, CA1053504514
  8. Nnenna AbaezeLong Beach, CA1457820763
  9. Raymond Abagat, FNPTorrance, CA1306685821
  10. Ashley AbalCastaic, CA1740140698

Common questions

What is Caren Marie Pfieffer, NP-C's NPI number?

Caren Marie Pfieffer, NP-C's National Provider Identifier (NPI) is 1124469085, issued on Jul 8, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Caren Marie Pfieffer, NP-C located?

The NPPES record lists a practice address at 195 Page Mill RD Ste 103, Palo Alto, CA, 94306. Phone: (888) 731-8994. Providers update this record themselves, so call before visiting.

How can I verify Caren Marie Pfieffer, NP-C's license?

NPPES lists California license number 95008587, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Caren Marie Pfieffer, NP-C prescribe under Medicare Part D?

In 2024, Caren Marie Pfieffer, NP-C had 62 Medicare Part D claims for 14 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.