Dr. Karisa Thayer, MD
- Part D claims, 2024
- 516
- Industry payments
- $110
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 4004 Beyer Blvd, San Diego, CA 92173
- Practice phone
- Call (619) 428-4463
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
San Ysidro Health Center
FQHC - Main Site · San Diego, California
Find Dr. Thayer's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Karisa Thayer is an internist in San Ysidro, California
Dr. Thayer practices at San Ysidro Health Center in San Diego, California.
Dr. Thayer's NPI, 1558765941, was assigned on October 14, 2014. Dr. Thayer graduated from Loma Linda University School of Medicine in 2014. Dr. Thayer holds California license A140754.
- NPI
- 1558765941NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961821004
- NPI enumeration date
- October 14, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (619) 428-4463
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Karisa Thayer practices at San Ysidro Health Center in San Diego, California
Dr. Thayer's primary practice is San Ysidro Health Center, at 4004 Beyer Blvd, San Diego, CA 92173 in San Diego County. The practice phone is (619) 428-4463.
- San Ysidro Health Center4004 Beyer Blvd, San Diego, CA 92173 · San Diego CountyPhone(619) 428-4463
Source: Dmand AI Affiliation Data
Dr. Karisa Thayer is affiliated with 1 site of care and 1 medical group
Dr. Thayer's primary practice is San Ysidro Health Center in San Diego, California. The medical group on file is San Ysidro Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Karisa Thayer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Thayer practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| San Ysidro Health Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Karisa Thayer is one of 16,751 internists in California
Internal medicine is Dr. Thayer's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Thayer is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Thayer
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Karisa Thayer's patients have a median age of 43
Across all payers, Dmand AI patient panel data puts Dr. Thayer's median patient age at 43, with 65% women.
Dr. Thayer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 43
Patient panel by sex, all payers
- Women65%
- Men34%
Source: Dmand AI Patient Panel Data
Dr. Karisa Thayer wrote 516 Medicare Part D claims in 2024
In 2024, Dr. Thayer wrote 516 Medicare Part D claims for 91 patients. 77% of them were for generic drugs. CMS names the drug for 236 of them, across 10 drugs with 11 or more claims each, at $20,891 in total drug cost. In 2023, CMS named 626 claims across 26 drugs.
Dr. Thayer's Part D claims by kind of drug, 2024
- Generic397 claims77%
- Brand-name and other119 claims23%
Dr. Thayer's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 6262024: 23662%
Drugs named by CMS: 10 in 2024, 26 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Karisa Thayer takes part in Medicare
Dr. Thayer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Karisa Thayer received $110 in industry payments from 2022 to 2023
CMS Open Payments shows 5 general payments to Dr. Thayer from 3 drug and device companies from 2022 to 2023. Food and beverage make up the largest share, 100% of the total. Dynavax Technologies Corporation paid the most, $50.
General payments to Dr. Thayer by program year, 2022 to 2023
Companies that paid Dr. Thayer the most, 2022 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Karisa Thayer graduated from Loma Linda University School of Medicine
Dr. Thayer graduated from Loma Linda University School of Medicine in 2014.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Karisa Thayer's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Karisa Thayer
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Karisa Thayer's NPI number?
Dr. Karisa Thayer's NPI number is 1558765941. It was assigned on October 14, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Karisa Thayer?
Dr. Karisa Thayer is an internist in San Ysidro, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Karisa Thayer practice?
Dr. Thayer practices at 4004 Beyer Blvd, San Diego, CA 92173. Dr. Thayer's primary practice is San Ysidro Health Center in San Diego, California.
What is Dr. Karisa Thayer's office phone number?
The practice phone on file for Dr. Thayer is (619) 428-4463.
What is Dr. Karisa Thayer's medical license number?
Dr. Thayer holds California license A140754.
What medical group is Dr. Karisa Thayer part of?
Dr. Thayer is linked to San Ysidro Health.
Does Dr. Karisa Thayer accept Medicare?
Yes. CMS lists Dr. Thayer as accepting Medicare assignment.
Where did Dr. Karisa Thayer go to medical school?
Dr. Thayer graduated from Loma Linda University School of Medicine in 2014.
What drugs does Dr. Karisa Thayer prescribe most?
In 2024 Medicare Part D data, Dr. Thayer's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Metformin HCl.
Has Dr. Karisa Thayer received payments from drug or device companies?
CMS Open Payments shows $110 in general payments to Dr. Thayer from 3 companies from 2022 to 2023. The largest total came from Dynavax Technologies Corporation.
How long has Dr. Karisa Thayer been practicing?
Dr. Thayer graduated from medical school in 2014, 12 years ago.
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