NPPES file of Aug 9, 2026

Hannah Farquharson, M.D.

Family Medicine Physician · Santa Cruz, CA

Hannah Farquharson, M.D. is a family medicine physician with a practice address in Santa Cruz, California, and NPI 1659437838, issued on Dec 29, 2006. Check the license (California A91901, 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
1659437838
Name
Hannah Farquharson
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
A91901 CA
Self-reported in NPPES; status is on the state search
Practice location
550 Water St Ste A, Santa Cruz, CA 95060
Phone
(831) 425-0420
Enumerated
Dec 29, 2006
Record last updated
Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(831) 425-0185
Medicare enrollment
Enrolled (PECOS I20081218000331); accepts Medicare assignment
Medical or professional school
University Of California, San Francisco School Of Medicine, 2003
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.
Download card Updates feed

Also registered at 550 Water St Ste A

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

  1. Rachel Ersoff, AUDAudiologist1104272657
  2. Charie Evans, PA-CPhysician Assistant1265775340
  3. Michael Hajek, MDOtolaryngology Physician1114456639
  4. Ruth Kaspar, AUDAudiologist1871631853
  5. Naomi Legate, NPNurse Practitioner1679827174
  6. Ken Norton, AU.D.Audiologist1104985613

Verify Hannah Farquharson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A91901    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.

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

82% fewer Medicare Part D claims than the average family medicine physician in 2024

633 Medicare Part D claims for 76 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 14 claims were for opioids.

  1. Hannah Farquharson633
  2. Specialty average3,544

Most prescribed

  1. Gabapentin47 claims
  2. Atorvastatin Calcium36 claims
  3. Jardiance28 claims
  4. Metoprolol Tartrate23 claims
  5. Diltiazem 24hr Er (La)21 claims
  6. Pradaxa19 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 IncWatsonville, CA

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

114 family medicine physician records list a practice address in Santa Cruz

They are 114 of the 5,138 NPPES records with a practice address in Santa Cruz, and 17,133 family medicine physician records in California.

All 114 in Santa Cruz → All 17,133 in California → Every provider in Santa Cruz →

Other family medicine physician records in California

  1. Omer Aba-Omer, MDSanta Monica, CA1649702093
  2. Michelle Ababa, MDWilmington, CA1710922513
  3. Anna Tzeitel Abalos, MDRoseville, CA1720200017
  4. Adan Abarca, MDAnaheim, CA1760553689
  5. Vanessa Abarca, DOVentura, CA1952040859
  6. Lorraine Abate, M.D.Sacramento, CA1104840008
  7. Robert Abatecola, MDCastro Valley, CA1669551719
  8. Romeo Abaya, M.D.Cottonwood, CA1598053506
  9. Effiem Abbah, MD, MPHSan Francisco, CA1821185133
  10. Khuzeman Abbasi, MDSanta Rosa, CA1841979952

Common questions

What is Hannah Farquharson, M.D.'s NPI number?

Hannah Farquharson, M.D.'s National Provider Identifier (NPI) is 1659437838, issued on Dec 29, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Hannah Farquharson, M.D. located?

The NPPES record lists a practice address at 550 Water St Ste A, Santa Cruz, CA, 95060. Phone: (831) 425-0420. Providers update this record themselves, so call before visiting.

How can I verify Hannah Farquharson, M.D.'s license?

NPPES lists California license number A91901, 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 Hannah Farquharson, M.D. prescribe under Medicare Part D?

In 2024, Hannah Farquharson, M.D. had 633 Medicare Part D claims for 76 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.

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.