PETER SUNGJIN PAK M.D.
NPI 1588955694
Surgery - Trauma Surgery in Mission Viejo, CA
About Peter Sungjin Pak M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PETER SUNGJIN PAK M.D. (NPI 1588955694) is an individual trauma surgery provider in Mission Viejo, California, licensed in California (A139698) and active in the NPI registry since April 2011. He is enrolled in Medicare PECOS and is a graduate of Albert Einstein College Of Medicine Of Yeshiva University (2011).
NPPES Registry Identity
Specialties & Licenses 2
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
Peter Sungjin Pak M.d. 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
6Medicare enrollment records show Peter Pak reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Mission Viejo, CA 92691
- Reassigned Medicare billing, California enrollment
- 28 clinicians in this Medicare group
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 840 clinicians in this Medicare group
Pomona, CA 91767
- Reassigned Medicare billing, California enrollment
- 12 clinicians in this Medicare group
Lancaster, CA 93534
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: High Desert Medical Corporation
- 81 clinicians in this Medicare group
Bethesda, MD 20814
- Reassigned Medicare billing, Maryland enrollment
- 4,483 clinicians in this Medicare group
Baltimore, MD 21287
- Reassigned Medicare billing, Maryland enrollment
- 23 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 9
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.
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 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MISSION VIEJO, CA 92691
MISSION VIEJO, CA 92691
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 Peter Pak's NPI number?
The NPI number for Peter Pak is 1588955694. It was assigned to this individual provider in the NPPES registry on April 22, 2011.
Where is Peter Pak located?
Peter Pak practices at 27799 Medical Center Rd Ste 440, Mission Viejo, CA 92691. The listed phone number is (949) 364-1007.
What is Peter Pak's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Trauma Surgery, with taxonomy code 2086S0127X.
Is Peter Pak enrolled in Medicare?
Yes. Peter 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 Peter Pak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Peter Pak reassigns Medicare benefits to 6 organizations: Oc Trauma Inc (Mission Viejo, CA), Pih Health Physicians (Orange, CA), The Institute Of Trauma And Acute Care Inc (Pomona, CA), High Desert Medical Group (Lancaster, CA), Johns Hopkins University (Bethesda, MD) 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 Peter 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 Peter Pak was last updated on July 19, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Peter Sungjin Pak, M.D. · NPI 1588955694
Trauma Surgery physician in Mission Viejo, California. Individual provider, active in the CMS NPPES registry since April 22, 2011.
## Identity
- **NPI:** 1588955694 (Entity type: Individual)
- **Enumerated:** April 22, 2011
- **Primary specialty:** Surgery - Trauma Surgery · taxonomy 2086S0127X
- **State license:** A139698 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 27799 MEDICAL CENTER RD STE 440, Mission Viejo, CA 92691-6400
- **Phone:** (949) 364-1007 · **Fax:** (949) 264-0317
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Oc Trauma Inc (NPI 1720516628, Mission Viejo, CA); Pih Health Physicians (NPI 1083313589, Orange, CA); The Institute Of Trauma And Acute Care Inc (NPI 1740711324, Pomona, CA); High Desert Medical Group (NPI 1720196702, Lancaster, CA); Johns Hopkins University (NPI 1578569240, Bethesda, MD); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Albert Einstein College Of Medicine Of Yeshiva University, class of 2011
## Record status
- **NPPES last updated:** July 19, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1588955694) · Data from the CMS NPPES public registry.