MARIAN PAK D.O.
NPI 1790128841
Obstetrics & Gynecology in Los Angeles, CA
About Marian Pak D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARIAN PAK D.O. (NPI 1790128841) is an individual obstetrics & gynecology provider in Los Angeles, California, licensed in California (20A13783) and active in the NPI registry since April 2013. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2013).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 1
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
Marian Pak D.o. 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
3Medicare enrollment records show Marian Pak reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90020
- Reassigned Medicare billing, California enrollment
- 840 clinicians in this Medicare group
Sun Valley, CA 91352
- Reassigned Medicare billing, California enrollment
- 3 clinicians in this Medicare group
Greenville, SC 29607
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Obhg California PC
- 711 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 90027 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
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 Marian Pak's NPI number?
The NPI number for Marian Pak is 1790128841. It was assigned to this individual provider in the NPPES registry on April 9, 2013.
Where is Marian Pak located?
Marian Pak practices at 1300 N Vermont Ave Ste 1001, Los Angeles, CA 90027. The listed phone number is (323) 473-5499.
What is Marian Pak's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Marian Pak enrolled in Medicare?
Yes. Marian Pak 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 Marian Pak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marian Pak reassigns Medicare benefits to 3 organizations: Pih Health Physicians (Los Angeles, CA), Joon Choi MD A Professional Corporation (Sun Valley, CA) and Obhg California, P.C. (Greenville, SC). 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 Marian Pak'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 Marian Pak was last updated on June 4, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years 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.
# Marian Pak, D.O. · NPI 1790128841
Obstetrics & Gynecology physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since April 9, 2013.
## Identity
- **NPI:** 1790128841 (Entity type: Individual)
- **Enumerated:** April 9, 2013
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 20A13783 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1300 N VERMONT AVE STE 1001, Los Angeles, CA 90027
- **Phone:** (323) 473-5499
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Pih Health Physicians (NPI 1518625367, Los Angeles, CA); Joon Choi MD A Professional Corporation (NPI 1316597693, Sun Valley, CA); Obhg California, P.C. (NPI 1215258892, Greenville, SC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2013
## Record status
- **NPPES last updated:** June 4, 2019
- **Other identifiers:** Other 20A13783 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1790128841) · Data from the CMS NPPES public registry.