ALAN H MALLACE MD
NPI 1659341667
Internal Medicine - Rheumatology in Phoenix, AZ
About Alan H Mallace Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALAN H MALLACE MD (NPI 1659341667) is an individual rheumatology provider in Phoenix, Arizona, licensed in Arizona (09569) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS and is a graduate of New York Medical College (1972).
NPPES Registry Identity
Specialties & Licenses 3
Other Identifiers 9
Accepted Insurance
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
Alan H Mallace Md 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
2Medicare enrollment records show Alan Mallace reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Phoenix, AZ 85027
- Reassigned Medicare billing, Arizona enrollment
- 822 clinicians in this Medicare group
Phoenix, AZ 85027
- Reassigned Medicare billing, Arizona enrollment
- 502 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 10
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 85023 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
PHOENIX, AZ 85023
PHOENIX, AZ 85023
PHOENIX, AZ 85023
PHOENIX, AZ 85023
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 Alan Mallace's NPI number?
The NPI number for Alan Mallace is 1659341667. It was assigned to this individual provider in the NPPES registry on January 23, 2006.
Where is Alan Mallace located?
Alan Mallace practices at 18444 N 25th Ave Ste 310, Phoenix, AZ 85023. The listed phone number is (866) 974-2673.
What is Alan Mallace's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
Is Alan Mallace enrolled in Medicare?
Yes. Alan Mallace 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 Alan Mallace's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alan Mallace reassigns Medicare benefits to 2 organizations: Honorhealth Ambulatory (Phoenix, AZ) and Honorhealth Medical Group, LLC (Phoenix, AZ). 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 Alan Mallace's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alan Mallace accept?
Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Blue Cross Blue Shield of Arizona, Cigna HealthCare of Arizona, Inc and Oscar Health Plan, Inc. list Alan Mallace as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Alan Mallace was last updated on October 6, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Alan H Mallace, MD · NPI 1659341667
Rheumatology physician in Phoenix, Arizona. Individual provider, active in the CMS NPPES registry since January 23, 2006.
## Identity
- **NPI:** 1659341667 (Entity type: Individual)
- **Enumerated:** January 23, 2006
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **State license:** 09569 (Arizona)
- **Sole proprietor:** No
## Practice location
- **Address:** 18444 N 25TH AVE, STE 310, Phoenix, AZ 85023-1266
- **Phone:** (866) 974-2673 · **Fax:** (866) 939-2673
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Honorhealth Ambulatory (NPI 1205450434, Phoenix, AZ); Honorhealth Medical Group, LLC (NPI 1073691093, Phoenix, AZ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York Medical College, class of 1972
## Record status
- **NPPES last updated:** October 6, 2014
- **Other identifiers:** Medicare UPIN C99925 (AZ); Medicare ID-Type Unspecified 24961 (AZ); Medicare ID-Type Unspecified 24962 (AZ); and 6 more
---
Source: [NPI Profile](https://npiprofile.com/npi/1659341667) · Data from the CMS NPPES public registry.