Lauren Hayley Stieger Clarine, D.O.
Internal Medicine Physician · San Marcos, CA
Lauren Hayley Stieger Clarine, D.O. is an internal medicine physician with a practice address in San Marcos, California, and NPI 1669738928, issued on Apr 11, 2012. Check the license (California 20A13059, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lauren Hayley Stieger Clarine
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A13059 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Craven RD, San Marcos, CA 92078
- Phone
- (877) 236-0333
- Enumerated
- Apr 11, 2012
- Record last updated
- Dec 15, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20171024002211); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 400 Craven RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tracy Abrams, R.N.Registered Nurse1073991261
- Eric Adiarte, M.D.Obstetrics & Gynecology Physician1902038284
- Shreya Aiyar, MDPediatrics Physician1922685981
- Najlaa Al-Jibouri, PHARM DPharmacist1447438965
- Jennifer Alexander, RCP, RRTPulmonary Function Technologist Certified Respiratory Therapist1023596442
- Marisa Alunni, M.D.Obstetrics & Gynecology Physician1710298476
Verify Lauren Hayley Stieger Clarine in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A13059Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average internal medicine physician in 2024
385 Medicare Part D claims for 130 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims.
Most prescribed
- Levothyroxine Sodium101 claims
- Methimazole55 claims
- Forteo30 claims
- Alendronate Sodium17 claims
- Humalog16 claims
- Ultra-Fine Mini Pen Needle11 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
- Southern California Permanente Medical GroupBonita, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lauren Hayley Stieger Clarine among 17,696 internal medicine physician records in California
Lauren Hayley Stieger Clarine, D.O. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 68% of them.
- NPI issued2012 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2012 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Marcos → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Meenu Bawa, M.DSan Marcos, CA 920781154598571
- Justin Charles, MDSan Marcos, CA 920781811552771
- Joseph Czvik, MDSan Marcos, CA 920781528084340
- Sze Hoay Ding, M.D.San Marcos, CA 920781023239035
- Kathryn Germeraad, DOSan Marcos, CA 920781649830498
- Francisco Marquez, M.D.San Marcos, CA 920781316190747
- Minh Nguyen, M.D.San Marcos, CA 920781154403640
- Tyler Sprague, D.O.San Marcos, CA 920781881077428
Common questions
What is Lauren Hayley Stieger Clarine, D.O.'s NPI number?
Lauren Hayley Stieger Clarine, D.O.'s National Provider Identifier (NPI) is 1669738928, issued on Apr 11, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Lauren Hayley Stieger Clarine, D.O. located?
The NPPES record lists a practice address at 400 Craven RD, San Marcos, CA, 92078. Phone: (877) 236-0333. Providers update this record themselves, so call before visiting.
How can I verify Lauren Hayley Stieger Clarine, D.O.'s license?
NPPES lists California license number 20A13059, 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 Lauren Hayley Stieger Clarine, D.O. prescribe under Medicare Part D?
In 2024, Lauren Hayley Stieger Clarine, D.O. had 385 Medicare Part D claims for 130 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.