Kristin J. Karlyn, MD
Internal Medicine Physician · Pasadena, CA
Kristin J. Karlyn, MD is an internal medicine physician with a practice address in Pasadena, California, and NPI 1033182530, issued on Feb 7, 2006. Check the license (California A063407, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kristin J. Karlyn
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A063407 CA
Self-reported in NPPES; status is on the state search - Practice location
- 301 S Fair Oaks Ave Ste 208, Pasadena, CA 91105
- Phone
- (626) 734-7870
- Enumerated
- Feb 7, 2006
- Record last updated
- Jun 17, 2026
- Fax
- (626) 593-6550
- Medicare enrollment
- Enrolled (PECOS I20050427000643); accepts Medicare assignment
- Medical or professional school
- University Of California, Irvine, California College Of Medicine, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 301 S Fair Oaks Ave Ste 208
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Iman JomaaPhysician Assistant1538403597
- Amaliya Santiago, N.D.Naturopath1720433808
Verify Kristin J. Karlyn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A063407Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% more Medicare Part D claims than the average internal medicine physician in 2024
4,062 Medicare Part D claims for 184 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 68 claims were for opioids.
Most prescribed
- Amlodipine Besylate196 claims
- Atorvastatin Calcium165 claims
- Rosuvastatin Calcium151 claims
- Levothyroxine Sodium137 claims
- Lisinopril121 claims
- Gabapentin106 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: $341.66
10 payments; by number, the most common kind was food and beverage; the largest payer was Teleflex LLC. 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.
Kristin J. Karlyn among 17,696 internal medicine physician records in California
Kristin J. Karlyn, MD 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1996 · 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).
137 internal medicine physician records list a practice address in Pasadena
They are 137 of the 10,525 NPPES records with a practice address in Pasadena, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Pasadena → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Dolores Barba, MDPasadena, CA 911051992700603
- Barry Blum, MDPasadena, CA 911051639141716
- Betsy Felser, MDPasadena, CA 911051144292897
- Todd Hee, M.D.Pasadena, CA 911051689648693
- Wei Huang-Lee, MDPasadena, CA 911051972576841
- George Jung, MDPasadena, CA 911051720051881
- Malathi Narayan, MDPasadena, CA 911051588637466
- Ronald Olah, MDPasadena, CA 911051881668341
Common questions
What is Kristin J. Karlyn, MD's NPI number?
Kristin J. Karlyn, MD's National Provider Identifier (NPI) is 1033182530, issued on Feb 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kristin J. Karlyn, MD located?
The NPPES record lists a practice address at 301 S Fair Oaks Ave Ste 208, Pasadena, CA, 91105. Phone: (626) 734-7870. Providers update this record themselves, so call before visiting.
How can I verify Kristin J. Karlyn, MD's license?
NPPES lists California license number A063407, 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 Kristin J. Karlyn, MD prescribe under Medicare Part D?
In 2024, Kristin J. Karlyn, MD had 4,062 Medicare Part D claims for 184 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.