DR. JOSEPH MOSS ALTER MD
NPI 1629365267
Emergency Medicine in Palmer, AK
About Dr. Joseph Moss Alter Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOSEPH MOSS ALTER MD (NPI 1629365267) is an individual emergency medicine provider in Palmer, Alaska, licensed in Alaska (MED T 8202) and active in the NPI registry since July 2011. He is enrolled in Medicare PECOS and maintains a secondary practice location in Brooklyn.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Joseph Moss Alter Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Joseph Alter reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Palmer, AK 99645
- Reassigned Medicare billing, Alaska enrollment
- Medicare enrollment name: Matsu Emergency Medicine Physicians Corp
- 35 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 99645 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PALMER, AK 99645
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 Joseph Alter's NPI number?
The NPI number for Joseph Alter is 1629365267. It was assigned to this individual provider in the NPPES registry on July 4, 2011. The provider is also known as Dr. Dubenion Joseph Moss MD.
Where is Joseph Alter located?
Joseph Alter practices at 2500 S Woodworth Loop, Palmer, AK 99645. The listed phone number is (907) 861-6000.
What is Joseph Alter's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Joseph Alter enrolled in Medicare?
Yes. Joseph Alter is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Joseph Alter's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Joseph Alter reassigns Medicare benefits to Mat-Su Emergency Medicine Physicians Corp (Palmer, AK). The 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 Joseph Alter'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 Joseph Alter was last updated on May 19, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Dr. Joseph Moss Alter, MD · NPI 1629365267
Emergency Medicine physician in Palmer, Alaska. Individual provider, active in the CMS NPPES registry since July 4, 2011.
## Identity
- **NPI:** 1629365267 (Entity type: Individual)
- **Enumerated:** July 4, 2011
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** MED T 8202 (Alaska)
- **Sole proprietor:** No
## Practice location
- **Address:** 2500 S WOODWORTH LOOP, Palmer, AK 99645
- **Phone:** (907) 861-6000
## 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:** Mat-Su Emergency Medicine Physicians Corp (NPI 1073548129, Palmer, AK), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 19, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1629365267) · Data from the CMS NPPES public registry.