Geoffrey Lee Graham, M.D.
Hospitalist Physician · Thousand Oaks, CA
Geoffrey Lee Graham, M.D. is a hospitalist physician with a practice address in Thousand Oaks, California, and NPI 1356343073, issued on Aug 12, 2005. Check the license (California G39820, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Geoffrey Lee Graham
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- G39820 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1534 N Moorpark RD, Thousand Oaks, CA 91360
- Phone
- (805) 497-1800
- Enumerated
- Aug 12, 2005
- Record last updated
- Jan 24, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (805) 523-7339
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 1534 N Moorpark RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jonathan Nasseri, M.D.Hospice and Palliative Medicine (Internal Medicine) Physician1184669160
Verify Geoffrey Lee Graham in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G39820Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average hospitalist physician in 2024
35 Medicare Part D claims for 12 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
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.
Geoffrey Lee Graham among 3,099 hospitalist physician records in California
Geoffrey Lee Graham, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 98% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileNo · 81% of these records are
- Record last updated2013 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Thousand Oaks → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Gholamreza Badiee, M.D.Thousand Oaks, CA 913601841561784
- Yann DacquayThousand Oaks, CA 913601639819634
- Asra Farooqui, MDThousand Oaks, CA 913601437286796
- Mahvand SadeghiThousand Oaks, CA 913601982019014
- Ann Seide, MDThousand Oaks, CA 913601649203084
- Jasprit Takher, M.D.Thousand Oaks, CA 913601235489709
- Aamir Iqbal, M.D.Thousand Oaks, CA 913611174054019
- Anitha Srinivasa, M.D.Westlake Village, CA 913611306876149
Common questions
What is Geoffrey Lee Graham, M.D.'s NPI number?
Geoffrey Lee Graham, M.D.'s National Provider Identifier (NPI) is 1356343073, issued on Aug 12, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Geoffrey Lee Graham, M.D. located?
The NPPES record lists a practice address at 1534 N Moorpark RD, Thousand Oaks, CA, 91360. Phone: (805) 497-1800. Providers update this record themselves, so call before visiting.
How can I verify Geoffrey Lee Graham, M.D.'s license?
NPPES lists California license number G39820, 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 Geoffrey Lee Graham, M.D. prescribe under Medicare Part D?
In 2024, Geoffrey Lee Graham, M.D. had 35 Medicare Part D claims for 12 beneficiaries; the average among hospitalist physician prescribers was 521. 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.