Gertrude Chancellor, FNP-BC
Family Medicine Physician · Lake Forest, CA
Gertrude Chancellor, FNP-BC is a family medicine physician with a practice address in Lake Forest, California, and NPI 1467944900, issued on May 31, 2018. Check the license (California 95007950, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gertrude Chancellor
- Credential
- FNP-BC
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 95007950 CA
Self-reported in NPPES; status is on the state search - Practice location
- 22481 Aspan St Ste A, Lake Forest, CA 92630
- Phone
- (949) 240-2272
- Enumerated
- May 31, 2018
- Record last updated
- Jun 24, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (949) 240-5869
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 22481 Aspan St Ste A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Selenia Corado, MPA, PA-CMedical Physician Assistant1295545622
- Carrie Diramio, MDFamily Medicine Physician1790782993
- Shelby Hart, PA-CPhysician Assistant1417755323
- Rachel SoltaniFamily Nurse Practitioner1164081006
Verify Gertrude Chancellor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 95007950Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average family medicine physician in 2024
680 Medicare Part D claims for 89 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Losartan Potassium55 claims
- Metformin Hcl52 claims
- Atorvastatin Calcium51 claims
- Lisinopril42 claims
- Levothyroxine Sodium33 claims
- Amlodipine Besylate27 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.
Gertrude Chancellor among 17,133 family medicine physician records in California
Gertrude Chancellor, FNP-BC 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 2018, is newer than 82% of them.
- NPI issued2018 · 82% of these records are older, 15% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2021 · 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).
14 family medicine physician records list a practice address in Lake Forest
They are 14 of the 1,008 NPPES records with a practice address in Lake Forest, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Lake Forest → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Mohammed Ali, M.D.Lake Forest, CA 926301053405506
- Carol Barnes-Blanks, MDLake Forest, CA 926301720009152
- Chyle Beaird, M.D.Lake Forest, CA 926301043374473
- Adel Boutros, MDLake Forest, CA 926301700952827
- James Decock, M.DLake Forest, CA 926301720019904
- Carrie Diramio, MDLake Forest, CA 926301790782993
- Michael Grossman, M.D.Lake Forest, CA 926301942367008
- Mary Koumas, D.O.Lake Forest, CA 926301306838909
Common questions
What is Gertrude Chancellor, FNP-BC's NPI number?
Gertrude Chancellor, FNP-BC's National Provider Identifier (NPI) is 1467944900, issued on May 31, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Gertrude Chancellor, FNP-BC located?
The NPPES record lists a practice address at 22481 Aspan St Ste A, Lake Forest, CA, 92630. Phone: (949) 240-2272. Providers update this record themselves, so call before visiting.
How can I verify Gertrude Chancellor, FNP-BC's license?
NPPES lists California license number 95007950, 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 Gertrude Chancellor, FNP-BC prescribe under Medicare Part D?
In 2024, Gertrude Chancellor, FNP-BC had 680 Medicare Part D claims for 89 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.