DOUGLAS F MCMAHON M.D.
NPI 1356533293
Allergy & Immunology in Maplewood, MN
About Douglas F Mcmahon M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DOUGLAS F MCMAHON M.D. (NPI 1356533293) is an individual allergy & immunology provider in Maplewood, Minnesota, licensed in Minnesota (55710) and active in the NPI registry since August 2007. He is enrolled in Medicare PECOS, is affiliated with Ladd Memorial Hospital, and is a graduate of Georgetown University School Of Medicine (2007).
NPPES Registry Identity
Specialties & Licenses 2
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
Douglas F Mcmahon 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 Douglas Mcmahon reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Maplewood, MN 55109
- Reassigned Medicare billing, Minnesota enrollment
- 4 clinicians in this Medicare group
Osceola, WI 54020
- Reassigned Medicare billing, Wisconsin enrollment
- 170 clinicians in this Medicare group
Baldwin, WI 54002
- Reassigned Medicare billing, Wisconsin enrollment
- 211 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 8
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ladd Memorial Hospital
Critical Access Hospitals · Osceola, WIOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Douglas Mcmahon's NPI number?
The NPI number for Douglas Mcmahon is 1356533293. It was assigned to this individual provider in the NPPES registry on August 14, 2007.
Where is Douglas Mcmahon located?
Douglas Mcmahon practices at 1655 Beam Ave Suite 108, Maplewood, MN 55109. The listed phone number is (612) 444-3247.
What is Douglas Mcmahon's specialty?
The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.
Is Douglas Mcmahon enrolled in Medicare?
Yes. Douglas Mcmahon 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 Douglas Mcmahon's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Douglas Mcmahon reassigns Medicare benefits to 3 organizations: Allergy And Asthma Center Of Minnesota PLLC (Maplewood, MN), Ladd Memorial Hospital (Osceola, WI) and Baldwin Area Medical Center, Inc. (Baldwin, WI). 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 Douglas Mcmahon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Douglas Mcmahon accept?
Health plans from Anthem Blue Cross and Blue Shield, HealthPartners and Security Health Plan list Douglas Mcmahon 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.
Is Douglas Mcmahon affiliated with any hospitals?
According to CMS data, Douglas Mcmahon is affiliated with Ladd Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Douglas Mcmahon was last updated on February 25, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Douglas F Mcmahon, M.D. · NPI 1356533293
Allergy & Immunology physician in Maplewood, Minnesota. Individual provider, active in the CMS NPPES registry since August 14, 2007.
## Identity
- **NPI:** 1356533293 (Entity type: Individual)
- **Enumerated:** August 14, 2007
- **Primary specialty:** Allergy & Immunology · taxonomy 207K00000X
- **State license:** 55710 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 1655 BEAM AVE, SUITE 108, Maplewood, MN 55109-1163
- **Phone:** (612) 444-3247 · **Fax:** (612) 888-9247
## 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): Allergy And Asthma Center Of Minnesota PLLC (NPI 1770900797, Maplewood, MN); Ladd Memorial Hospital (NPI 1467560227, Osceola, WI); Baldwin Area Medical Center, Inc. (NPI 1467496133, Baldwin, WI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Georgetown University School Of Medicine, class of 2007
## Record status
- **NPPES last updated:** February 25, 2015
---
Source: [NPI Profile](https://npiprofile.com/npi/1356533293) · Data from the CMS NPPES public registry.