Dr. Kristin J. Karlyn, MD
- Medicare services, 2024
- 647
- Medicare patients, 2024
- 142
- Part D claims, 2024
- 4,062
- Hospital affiliations
- 1
- Industry payments
- $1,089
- Practice address
- 4301 Lost Hills Rd, Agoura Hills, CA 91301
- Practice phone
- Call (858) 668-3700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Laboratory Corporation of America
Agoura Hills, California
Find Dr. Karlyn'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. Kristin J. Karlyn is an internist in Agoura Hills, California
Dr. Karlyn practices at Laboratory Corporation of America in Agoura Hills, California.
Dr. Karlyn's NPI, 1033182530, was assigned on February 7, 2006. Dr. Karlyn graduated from UC Irvine School of Medicine in 1996. Dr. Karlyn's California license number on file is A063407.
- NPI
- 1033182530NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3173562352
- NPI enumeration date
- February 7, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (858) 668-3700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kristin J. Karlyn practices at Laboratory Corporation of America in Agoura Hills, California
Dr. Karlyn's primary practice is Laboratory Corporation of America, at 4301 Lost Hills Rd, Agoura Hills, CA 91301 in Los Angeles County. The practice phone is (858) 668-3700.
- Laboratory Corporation of America4301 Lost Hills Rd, Agoura Hills, CA 91301 · Los Angeles CountyPhone(858) 668-3700
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Kristin J. Karlyn is affiliated with 6 sites of care and 2 medical groups
Dr. Karlyn's primary practice is Laboratory Corporation of America in Agoura Hills, California. Dr. Karlyn is also affiliated with Huntington Hospital. The medical group on file is Optum - Downtown Los Angeles. Dmand AI also links Dr. Karlyn to 2 more group practices and clinics, 1 physician office, 1 home health agency and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Kristin J. Karlyn's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Karlyn practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Laboratory Corporation of America | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Kristin J. Karlyn is one of 16,751 internists in California
Internal medicine is Dr. Karlyn's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Karlyn is board certified in internal medicine by the American Board of Internal Medicine. Dr. Karlyn has a license on file in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute sinusitis, acute skin infection, adjustment disease, alzheimer's disease, arthritis, asthma and atrial fibrillation and flutter among the conditions Dr. Karlyn treats.
Internists near Dr. Karlyn
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. Kristin J. Karlyn billed Medicare for 647 services in 2024
CMS data shows 647 Medicare services from Dr. Karlyn across 11 procedure codes in 2024, for 142 Medicare patients. Medicare paid $44,168 for them. Every service was in an office.
Dr. Karlyn's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3512024: 31311%
- Other services
- 2023: 1322024: 1292%
- Tests and treatments
- 2023: 852024: 11232%
- Drugs given in the office
- 2023: 312024: 62100%
- Surgery
- 2023: 242024: 3129%
Dr. Karlyn compared with the California median for internists, 2024
- Dr. Karlyn
- California median
- Medicare services
- 647vs 36179% above
- Medicare patients
- 142vs 1516% below
- Part D claims
- 3,319vs 4217.9 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Karlyn's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Karlyn?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Karlyn and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kristin J. Karlyn treated 142 Medicare patients in 2024, average age 78
CMS counts 142 Medicare patients who saw Dr. Karlyn in 2024. The largest group is 75 to 84, with 56 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.01, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Karlyn's median patient age at 70, with 64% women.
Dr. Karlyn's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Karlyn's Medicare patients by sex, 2024
- Women10272%
- Men4028%
Chronic conditions among Dr. Karlyn's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis61%
- Diabetes32%
- Mood disorders23%
- Ischemic heart disease22%
- Osteoporosis21%
- Atrial fibrillation18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Karlyn's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women64%
- Men34%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Kristin J. Karlyn wrote 4,062 Medicare Part D claims in 2024
In 2024, Dr. Karlyn wrote 4,062 Medicare Part D claims for 184 patients. 86% of them were for generic drugs. CMS names the drug for 3,319 of them, across 90 drugs with 11 or more claims each, at $282,707 in total drug cost. In 2023, CMS named 3,114 claims across 85 drugs.
Dr. Karlyn's Part D claims by kind of drug, 2024
- Generic3,491 claims86%
- Brand-name549 claims14%
- Other22 claims1%
Dr. Karlyn'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.
Drug classes CMS tracks in Dr. Karlyn's Part D claims, 2024
- Opioids2%68 of 4,062 claims
- Antibiotics6%232 of 4,062 claims
- Antipsychotics, patients 65 and over0%16 of 4,062 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,1142024: 3,3197%
Drugs named by CMS: 90 in 2024, 85 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
Dr. Kristin J. Karlyn offers telehealth to Medicare patients
Dr. Karlyn accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Karlyn as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Kristin J. Karlyn received $1,089 in industry payments from 2016 to 2025
CMS Open Payments shows 31 general payments to Dr. Karlyn from 16 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Eli Lilly and Company paid the most, $235.
General payments to Dr. Karlyn by program year, 2016 to 2025
Companies that paid Dr. Karlyn the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Kristin J. Karlyn graduated from UC Irvine School of Medicine
Dr. Karlyn graduated from UC Irvine School of Medicine in 1996.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Kristin J. Karlyn accepts plans from 16 insurance carriers
Dr. Karlyn is in network with 16 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Alliant Health Plans
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- +8 more carriersWith a free account
Plan types Dr. Karlyn accepts, by number of carriers
- PPO10
- Medicare8
- HMO6
- POS6
- EPO4
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Kristin J. Karlyn'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Kristin J. Karlyn
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. Kristin J. Karlyn's NPI number?
Dr. Kristin J. Karlyn's NPI number is 1033182530. It was assigned on February 7, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Kristin J. Karlyn?
Dr. Kristin J. Karlyn is an internist in Agoura Hills, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Kristin J. Karlyn practice?
Dr. Karlyn practices at 4301 Lost Hills Rd, Agoura Hills, CA 91301. Dr. Karlyn's primary practice is Laboratory Corporation of America in Agoura Hills, California. Dmand AI also links Dr. Karlyn to 2 group practices and clinics, 1 physician office, 1 home health agency and 1 medical group.
What is Dr. Kristin J. Karlyn's office phone number?
The practice phone on file for Dr. Karlyn is (858) 668-3700.
What is Dr. Kristin J. Karlyn's medical license number?
Dr. Karlyn's California license number on file is A063407.
Which hospitals is Dr. Kristin J. Karlyn affiliated with?
Dr. Karlyn is affiliated with Huntington Hospital.
What medical group is Dr. Kristin J. Karlyn part of?
Dr. Karlyn is linked to Optum - Downtown Los Angeles. Dmand AI links Dr. Karlyn to 1 more medical group.
Does Dr. Kristin J. Karlyn accept Medicare?
Yes. CMS data shows Dr. Karlyn billed Medicare for 647 services in 2024, and Dr. Karlyn accepts Medicare assignment.
Does Dr. Kristin J. Karlyn offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Karlyn as offering telehealth services.
How many Medicare patients does Dr. Kristin J. Karlyn see?
CMS counts 142 Medicare patients who saw Dr. Karlyn in 2024, with an average age of 78.
Show 7 more questionsShow fewer questions
Is Dr. Kristin J. Karlyn board certified?
Yes. Dr. Karlyn is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Kristin J. Karlyn bill to Medicare?
In 2024, Dr. Karlyn's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and medicare service (G0439).
Where did Dr. Kristin J. Karlyn go to medical school?
Dr. Karlyn graduated from UC Irvine School of Medicine in 1996.
What drugs does Dr. Kristin J. Karlyn prescribe most?
In 2024 Medicare Part D data, Dr. Karlyn's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Rosuvastatin Calcium.
Has Dr. Kristin J. Karlyn received payments from drug or device companies?
CMS Open Payments shows $1,089 in general payments to Dr. Karlyn from 16 companies from 2016 to 2025. The largest total came from Eli Lilly and Company.
How long has Dr. Kristin J. Karlyn been practicing?
Dr. Karlyn graduated from medical school in 1996, 30 years ago.
What insurance does Dr. Kristin J. Karlyn accept?
Dr. Karlyn is in network with 16 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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