KARINE HAJYAN DO
NPI 1154644425
Obstetrics & Gynecology in Lafayette, CA
About Karine Hajyan Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KARINE HAJYAN DO (NPI 1154644425) is an individual obstetrics & gynecology provider in Lafayette, California, licensed in California (20A12220) and active in the NPI registry since March 2010. She is enrolled in Medicare PECOS and is a graduate of Lake Erie College Of Osteopathic Medicine, Erie (2007).
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 (PECOS)
Karine Hajyan Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
6Medicare enrollment records show Karine Hajyan reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Walnut Creek, CA 94597
- Reassigned Medicare billing, California enrollment
- 650 clinicians in this Medicare group
Walnut Creek, CA 94598
- Reassigned Medicare billing, California enrollment
- 810 clinicians in this Medicare group
Oakland, CA 94602
- Reassigned Medicare billing, California enrollment
- 900 clinicians in this Medicare group
Richmond, CA 94801
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Campbell, CA 95008
- Reassigned Medicare billing, California enrollment
- 59 clinicians in this Medicare group
Stockton, CA 95204
- Reassigned Medicare billing, California enrollment
- 83 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94549 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Karine Hajyan's NPI number?
The NPI number for Karine Hajyan is 1154644425. It was assigned to this individual provider in the NPPES registry on March 1, 2010.
Where is Karine Hajyan located?
Karine Hajyan practices at 970 Dewing Ave Ste 301, Lafayette, CA 94549. The listed phone number is (925) 385-7023.
What is Karine Hajyan's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Karine Hajyan enrolled in Medicare?
Yes. Karine Hajyan is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Karine Hajyan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karine Hajyan reassigns Medicare benefits to 6 organizations: John Muir Physician Network (Walnut Creek, CA), John Muir Trauma Physicians Billing Service (Walnut Creek, CA), Alameda Health System (Oakland, CA), Permanente Medical Group Inc (Richmond, CA), Obstetrix Medical Group Of California, A Professional Corporation (Campbell, CA) and 1 more organization, listed in the Medicare section above. 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 Karine Hajyan'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 Karine Hajyan was last updated on August 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Karine Hajyan, DO · NPI 1154644425
Obstetrics & Gynecology physician in Lafayette, California. Individual provider, active in the CMS NPPES registry since March 1, 2010.
## Identity
- **NPI:** 1154644425 (Entity type: Individual)
- **Enumerated:** March 1, 2010
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 20A12220 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 970 DEWING AVE STE 301, Lafayette, CA 94549-4284
- **Phone:** (925) 385-7023
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): John Muir Physician Network (NPI 1841407665, Walnut Creek, CA); John Muir Trauma Physicians Billing Service (NPI 1093864837, Walnut Creek, CA); Alameda Health System (NPI 1740332931, Oakland, CA); Permanente Medical Group Inc (NPI 1235226531, Richmond, CA); Obstetrix Medical Group Of California, A Professional Corporation (NPI 1629175336, Campbell, CA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Lake Erie College Of Osteopathic Medicine, Erie, class of 2007
## Record status
- **NPPES last updated:** August 2, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1154644425) · Data from the CMS NPPES public registry.