ALEXANDER RICHARD BOLTON D.O.
NPI 1639581127
Hospitalist in Caribou, ME
About Alexander Richard Bolton D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALEXANDER RICHARD BOLTON D.O. (NPI 1639581127) is an individual hospitalist provider in Caribou, Maine, licensed in Maine (DO-3750) and active in the NPI registry since June 2014. He is enrolled in Medicare PECOS, is affiliated with Cary Medical Center, and is a graduate of At Still University Of Health Sciences, College Of Osteo Med, Kirksville (2014).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 3
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
Alexander Richard Bolton D.o. 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 Alexander Bolton reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Caribou, ME 04736
- Reassigned Medicare billing, Maine enrollment
- 91 clinicians in this Medicare group
Caribou, ME 04736
- Reassigned Medicare billing, Maine enrollment
- 110 clinicians in this Medicare group
West Des Moines, IA 50266
- Reassigned Medicare billing, Illinois enrollment
- 178 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 7
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Cary Medical Center
Acute Care Hospitals · Caribou, MENorthern Light Eastern Maine Medical Center
Acute Care Hospitals · Bangor, MEPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 04736 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 18
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CARIBOU, ME 04736
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 Alexander Bolton's NPI number?
The NPI number for Alexander Bolton is 1639581127. It was assigned to this individual provider in the NPPES registry on June 2, 2014.
Where is Alexander Bolton located?
Alexander Bolton practices at 163 Van Buren Rd Ste 1, Caribou, ME 04736. The listed phone number is (207) 498-3111.
What is Alexander Bolton's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Alexander Bolton enrolled in Medicare?
Yes. Alexander Bolton 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 Alexander Bolton's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Bolton reassigns Medicare benefits to 3 organizations: Pines Health Services (Caribou, ME), City Of Caribou (Caribou, ME) and Iowa Physicians Clinic Medical Foundation (West Des Moines, IA). 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 Alexander Bolton's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alexander Bolton accept?
Health plans from Anthem Blue Cross and Blue Shield and Wellmark Health Plan of Iowa, Inc. list Alexander Bolton 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 Alexander Bolton affiliated with any hospitals?
According to CMS data, Alexander Bolton is affiliated with Cary Medical Center and Northern Light Eastern Maine Medical Center.
When was this NPI record last updated?
The NPPES record for Alexander Bolton was last updated on September 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 days 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.
# Alexander Richard Bolton, D.O. · NPI 1639581127
Hospitalist physician in Caribou, Maine. Individual provider, active in the CMS NPPES registry since June 2, 2014.
## Identity
- **NPI:** 1639581127 (Entity type: Individual)
- **Enumerated:** June 2, 2014
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** DO-3750 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** 163 VAN BUREN RD STE 1, Caribou, ME 04736-3588
- **Phone:** (207) 498-3111
## 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): Pines Health Services (NPI 1528383262, Caribou, ME); City Of Caribou (NPI 1780615492, Caribou, ME); Iowa Physicians Clinic Medical Foundation (NPI 1366425274, West Des Moines, IA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** At Still University Of Health Sciences, College Of Osteo Med, Kirksville, class of 2014
## Record status
- **NPPES last updated:** September 14, 2026
- **Other identifiers:** Other DO-05182 (IA); Other DO-3750 (ME); Other 036.163598 (IL)
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Source: [NPI Profile](https://npiprofile.com/npi/1639581127) · Data from the CMS NPPES public registry.