Clair Savellano Segui, M.D.
Family Medicine Physician · Union City, CA
Clair Savellano Segui, M.D. is a family medicine physician with a practice address in Union City, California, and NPI 1811939598, issued on Jun 10, 2006. Check the license (California A84991, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Clair Savellano Segui
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A84991 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3553 Whipple RD, Union City, CA 94587
- Phone
- (510) 454-1000
- Enumerated
- Jun 10, 2006
- Record last updated
- Dec 14, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (510) 797-0236
- Medicare enrollment
- Enrolled (PECOS I20040602001339); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 3553 Whipple RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Clair Savellano Segui in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A84991Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% more Medicare Part D claims than the average family medicine physician in 2024
6,587 Medicare Part D claims for 981 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 264 claims were for opioids.
Most prescribed
- Atorvastatin Calcium518 claims
- Losartan Potassium336 claims
- Amlodipine Besylate334 claims
- Atenolol226 claims
- Metformin Hcl Er221 claims
- Lisinopril158 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
- Permanente Medical Group IncRichmond, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Clair Savellano Segui among 17,133 family medicine physician records in California
Clair Savellano Segui, M.D. 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1996 · median 2005 among the 10,652 with a school on file
- 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).
19 family medicine physician records list a practice address in Union City
They are 19 of the 1,006 NPPES records with a practice address in Union City, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Union City → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Antonina Bondyasheva, M.D.Union City, CA 945871194982462
- Rudolph Chang, D.O.Union City, CA 945871376835595
- Matthew Eisley, M.D.Union City, CA 945871689810483
- Lynda Kay, M.D.Union City, CA 945871740320183
- Kawalpreet Manku, M.D.Union City, CA 945871851406466
- Abraham Mohmand, M.D.Union City, CA 945871982995494
- Diana Mokaya, M.D.Union City, CA 945871023458528
- Son Lam Nguyen, D.O.Union City, CA 945871093851768
Common questions
What is Clair Savellano Segui, M.D.'s NPI number?
Clair Savellano Segui, M.D.'s National Provider Identifier (NPI) is 1811939598, issued on Jun 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Clair Savellano Segui, M.D. located?
The NPPES record lists a practice address at 3553 Whipple RD, Union City, CA, 94587. Phone: (510) 454-1000. Providers update this record themselves, so call before visiting.
How can I verify Clair Savellano Segui, M.D.'s license?
NPPES lists California license number A84991, 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 Clair Savellano Segui, M.D. prescribe under Medicare Part D?
In 2024, Clair Savellano Segui, M.D. had 6,587 Medicare Part D claims for 981 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.