Ann Phillips Seide, MD
Hospitalist Physician · Thousand Oaks, CA
Ann Phillips Seide, MD is a hospitalist physician with a practice address in Thousand Oaks, California, and NPI 1649203084, issued on Jul 9, 2006. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ann Phillips Seide
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- MD00040843 WA
Self-reported in NPPES; status is on the state search - Practice location
- 215 W Janss RD, Thousand Oaks, CA 91360
- Phone
- (805) 497-2727
- Enumerated
- Jul 9, 2006
- Record last updated
- Jun 16, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicaid ID
- 1649203084 WA
- Medicare enrollment
- Enrolled (PECOS I20150527003011); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 215 W Janss RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sandra Abadir, MDStudent in an Organized Health Care Education/Training Program1609578152
- Danny Abdalnour, MDStudent in an Organized Health Care Education/Training Program1598613705
- Sara Abdel AzimStudent in an Organized Health Care Education/Training Program1760284384
- Ziad Abdullatif, D.O.Student in an Organized Health Care Education/Training Program1710689419
- Bianca Abramian, MDStudent in an Organized Health Care Education/Training Program1649118332
- Rehman Afraz, MDStudent in an Organized Health Care Education/Training Program1265370407
Verify Ann Phillips Seide in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% more Medicare Part D claims than the average hospitalist physician in 2024
614 Medicare Part D claims for 72 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 35 claims were for opioids.
Most prescribed
- Gabapentin39 claims
- Levothyroxine Sodium33 claims
- Cephalexin19 claims
- Metoprolol Tartrate18 claims
- Furosemide16 claims
- Trazodone Hcl13 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
- Alliance For Wellness IncPanorama City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ann Phillips Seide among 3,099 hospitalist physician records in California
Ann Phillips Seide, MD 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 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 73% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated1995 · median 2010 among the 2,505 with a school on file
- Record last updated2018 · 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
- Geoffrey Graham, M.D.Thousand Oaks, CA 913601356343073
- Mahvand SadeghiThousand Oaks, CA 913601982019014
- 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 Ann Phillips Seide, MD's NPI number?
Ann Phillips Seide, MD's National Provider Identifier (NPI) is 1649203084, issued on Jul 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ann Phillips Seide, MD located?
The NPPES record lists a practice address at 215 W Janss RD, Thousand Oaks, CA, 91360. Phone: (805) 497-2727. Providers update this record themselves, so call before visiting.
How can I verify Ann Phillips Seide, MD's license?
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 Ann Phillips Seide, MD prescribe under Medicare Part D?
In 2024, Ann Phillips Seide, MD had 614 Medicare Part D claims for 72 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.