Silvia Giselle Los, M.D.
Family Medicine Physician · Katy, TX
Silvia Giselle Los, M.D. is a family medicine physician with a practice address in Katy, Texas, and NPI 1790896389, issued on Aug 31, 2006. Check the license (Texas S2828, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Silvia Giselle Los
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- S2828 TX
243604 MA
Self-reported in NPPES; status is on the state search - Practice location
- 24968 Katy Ranch RD Unit 300, Katy, TX 77494
- Phone
- (346) 998-5000
- Enumerated
- Aug 31, 2006
- Record last updated
- Jan 31, 2024
- Fax
- (281) 394-2057
- Medicaid IDs
- 403244302 TX
403244308 TX
403244301 TX
412329102 TX - Medicare enrollment
- Enrolled (PECOS I20191001003006); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 11,119 in Texas → Look up another NPI →
Also registered at 24968 Katy Ranch RD Unit 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jacqueline Sadowski, FNP-CFamily Nurse Practitioner1669962262
Verify Silvia Giselle Los in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license S2828Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average family medicine physician in 2024
979 Medicare Part D claims for 112 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium58 claims
- Metformin Hcl55 claims
- Levothyroxine Sodium45 claims
- Alendronate Sodium42 claims
- Lisinopril38 claims
- Losartan Potassium37 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
- Steadfast Primary Care, LLCKaty, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Silvia Giselle Los among 11,119 family medicine physician records in Texas
Silvia Giselle Los, M.D. is one of 11,119 family medicine physician records with a practice address in Texas. 82% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1997 · median 2004 among the 7,095 with a school on file
- Record last updated2024 · 51% 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 Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
109 family medicine physician records list a practice address in Katy
They are 109 of the 5,078 NPPES records with a practice address in Katy, and 11,119 family medicine physician records in Texas.
All 11,119 in Texas → Every provider in Katy → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Cynthia Anthis, MDKaty, TX 774941477613016
- Joshua Defriece, M.D.Katy, TX 774941649476482
- Sejal Desai, MDKaty, TX 774941932362829
- Ami Foster, M.D.Katy, TX 774941306874813
- Neetee Gadgil, DO, MPHKaty, TX 774941518162130
- Jennifer Garrison, D.O.Katy, TX 774941396901138
- Stella Immanuel, MDKaty, TX 774941902947120
- Cindy Jacob, MDKaty, TX 774941174747661
Common questions
What is Silvia Giselle Los, M.D.'s NPI number?
Silvia Giselle Los, M.D.'s National Provider Identifier (NPI) is 1790896389, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Silvia Giselle Los, M.D. located?
The NPPES record lists a practice address at 24968 Katy Ranch RD Unit 300, Katy, TX, 77494. Phone: (346) 998-5000. Providers update this record themselves, so call before visiting.
How can I verify Silvia Giselle Los, M.D.'s license?
NPPES lists Texas license number S2828, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Silvia Giselle Los, M.D. prescribe under Medicare Part D?
In 2024, Silvia Giselle Los, M.D. had 979 Medicare Part D claims for 112 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.