KRISTIN J KARLYN MD
NPI 1033182530
Internal Medicine in Pasadena, CA
About Kristin J Karlyn Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KRISTIN J KARLYN MD (NPI 1033182530) is an individual internal medicine provider in Pasadena, California, licensed in California (A063407) and active in the NPI registry since February 2006. She is enrolled in Medicare PECOS and is a graduate of University Of California, Irvine, California College Of Medicine (1996).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Kristin J Karlyn Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Kristin Karlyn reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Pasadena, CA 91105
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Pasadena Hospital Association, Ltd.
- 8 clinicians in this Medicare group
Pasadena, CA 91105
- Reassigned Medicare billing, California enrollment
- 204 clinicians in this Medicare group
Pasadena, CA 91105
- Reassigned Medicare billing, California enrollment
Los Angeles, CA 90015
- Reassigned Medicare billing, California enrollment
- 2,052 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 10
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91105 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PASADENA, CA 91105
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Kristin Karlyn's NPI number?
The NPI number for Kristin Karlyn is 1033182530. It was assigned to this individual provider in the NPPES registry on February 7, 2006.
Where is Kristin Karlyn located?
Kristin Karlyn practices at 301 S Fair Oaks Ave Ste 208, Pasadena, CA 91105. The listed phone number is (626) 734-7870.
What is Kristin Karlyn's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Kristin Karlyn enrolled in Medicare?
Yes. Kristin Karlyn is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Kristin Karlyn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kristin Karlyn reassigns Medicare benefits to 4 organizations: Pasadena Hosptial Association, Ltd. (Pasadena, CA), The Huntington Medical Foundation (Pasadena, CA), Kristin Karlyn MD PC (Pasadena, CA) and Healthcare Partners Affiliates Medical Group (Los Angeles, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Kristin Karlyn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Kristin Karlyn was last updated on June 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Kristin J Karlyn, MD · NPI 1033182530
Internal Medicine physician in Pasadena, California. Individual provider, active in the CMS NPPES registry since February 7, 2006.
## Identity
- **NPI:** 1033182530 (Entity type: Individual)
- **Enumerated:** February 7, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A063407 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 301 S FAIR OAKS AVE STE 208, Pasadena, CA 91105-2562
- **Phone:** (626) 734-7870 · **Fax:** (626) 593-6550
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Pasadena Hosptial Association, Ltd. (NPI 1396900650, Pasadena, CA); The Huntington Medical Foundation (NPI 1154467181, Pasadena, CA); Kristin Karlyn MD PC (NPI 1528714771, Pasadena, CA); Healthcare Partners Affiliates Medical Group (NPI 1659312593, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Irvine, California College Of Medicine, class of 1996
## Record status
- **NPPES last updated:** June 17, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1033182530) · Data from the CMS NPPES public registry.