MARK PORTMAN M.D.
NPI 1023545340
Emergency Medicine in Sacramento, CA
About Mark Portman M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK PORTMAN M.D. (NPI 1023545340) is an individual emergency medicine provider in Sacramento, California, licensed in California (A158525) and active in the NPI registry since May 2017. He is enrolled in Medicare PECOS and is a graduate of Other (2017).
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
Mark Portman 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
3Medicare enrollment records show Mark Portman reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Sacramento, CA 95819
- Reassigned Medicare billing, California enrollment
- 2,323 clinicians in this Medicare group
Sacramento, CA 95816
- Reassigned Medicare billing, California enrollment
- 73 clinicians in this Medicare group
Roseville, CA 95661
- Reassigned Medicare billing, California enrollment
- 40 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 5
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 95817 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 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SACRAMENTO, CA 95817
SACRAMENTO, CA 95817
SACRAMENTO, CA 95817
SACRAMENTO, CA 95817
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 Mark Portman's NPI number?
The NPI number for Mark Portman is 1023545340. It was assigned to this individual provider in the NPPES registry on May 17, 2017.
Where is Mark Portman located?
Mark Portman practices at 2315 Stockton Blvd., Sacramento, CA 95817. The listed phone number is (916) 734-8570.
What is Mark Portman's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Mark Portman enrolled in Medicare?
Yes. Mark Portman 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 Mark Portman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Portman reassigns Medicare benefits to 3 organizations: Cep America - California (Sacramento, CA), Vituity-California Observation Services PC (Sacramento, CA) and Vitalen Inpatient Care PC (Roseville, 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 Mark Portman'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 Mark Portman was last updated on July 9, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Mark Portman, M.D. · NPI 1023545340
Emergency Medicine physician in Sacramento, California. Individual provider, active in the CMS NPPES registry since May 17, 2017.
## Identity
- **NPI:** 1023545340 (Entity type: Individual)
- **Enumerated:** May 17, 2017
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A158525 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2315 STOCKTON BLVD., Sacramento, CA 95817
- **Phone:** (916) 734-8570 · **Fax:** (916) 734-7950
## 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): Cep America - California (NPI 1356695092, Sacramento, CA); Vituity-California Observation Services PC (NPI 1447148705, Sacramento, CA); Vitalen Inpatient Care PC (NPI 1134069198, Roseville, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** July 9, 2020
---
Source: [NPI Profile](https://npiprofile.com/npi/1023545340) · Data from the CMS NPPES public registry.