Kathryn Davis Germeraad, DO
Internal Medicine Physician · San Marcos, CA
Kathryn Davis Germeraad, DO is an internal medicine physician with a practice address in San Marcos, California, and NPI 1649830498, issued on Jun 14, 2019. Check the license (California 23504, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kathryn Davis Germeraad
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 23504 CA
331481 LA
0116032621 VA
Self-reported in NPPES; status is on the state search - Practice location
- 314 S Twin Oaks Valley RD Ste 114, San Marcos, CA 92078
- Phone
- (858) 554-1212
- Enumerated
- Jun 14, 2019
- Record last updated
- Mar 12, 2026
- Fax
- (858) 795-1195
- Medicare enrollment
- Enrolled (PECOS I20260226002718); accepts Medicare assignment
- Medical or professional school
- Lincoln Mem Univ, Debusk Col Of Osteopathic Med, 2019
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 314 S Twin Oaks Valley RD Ste 114
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Justin Charles, MDInternal Medicine Physician1811552771
- Sarah Mott, MMS, PA-CMedical Physician Assistant1346491958
Verify Kathryn Davis Germeraad in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 23504Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
54 Medicare Part D claims for 17 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Methocarbamol19 claims
- Meloxicam13 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.
Industry payments in 2024: $42.25
2 payments; by number, the most common kind was food and beverage; the largest payer was Breas Medical, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Monica Perlman MD IncSan Marcos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kathryn Davis Germeraad among 17,696 internal medicine physician records in California
Kathryn Davis Germeraad, DO 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 2019, is newer than 86% of them.
- NPI issued2019 · 86% of these records are older, 11% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2019 · median 2004 among the 11,065 with a school on file
- Record last updated2026 · 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
- Lauren Clarine, D.O.San Marcos, CA 920781669738928
- Joseph Czvik, MDSan Marcos, CA 920781528084340
- Sze Hoay Ding, M.D.San Marcos, CA 920781023239035
- 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 Kathryn Davis Germeraad, DO's NPI number?
Kathryn Davis Germeraad, DO's National Provider Identifier (NPI) is 1649830498, issued on Jun 14, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Kathryn Davis Germeraad, DO located?
The NPPES record lists a practice address at 314 S Twin Oaks Valley RD Ste 114, San Marcos, CA, 92078. Phone: (858) 554-1212. Providers update this record themselves, so call before visiting.
How can I verify Kathryn Davis Germeraad, DO's license?
NPPES lists California license number 23504, 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 Kathryn Davis Germeraad, DO prescribe under Medicare Part D?
In 2024, Kathryn Davis Germeraad, DO had 54 Medicare Part D claims for 17 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.