DR. JONATHAN TAYLOR GRAMMER MD
NPI 1003375189
Emergency Medicine in Brunswick, ME
About Dr. Jonathan Taylor Grammer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JONATHAN TAYLOR GRAMMER MD (NPI 1003375189) is an individual emergency medicine provider in Brunswick, Maine, licensed in Maine (MD25342) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Central Maine Medical Center, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
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
Dr. Jonathan Taylor Grammer 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
6Medicare enrollment records show Jonathan Grammer reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Brunswick, ME 04011
- Reassigned Medicare billing, Maine enrollment
- 170 clinicians in this Medicare group
Southwest Harbor, ME 04679
- Reassigned Medicare billing, Maine enrollment
- 87 clinicians in this Medicare group
Bangor, ME 04401
- Reassigned Medicare billing, Maine enrollment
- 259 clinicians in this Medicare group
Ellsworth, ME 04605
- Reassigned Medicare billing, Maine enrollment
- 167 clinicians in this Medicare group
Houlton, ME 04730
- Reassigned Medicare billing, Maine enrollment
- 129 clinicians in this Medicare group
Caribou, ME 04736
- Reassigned Medicare billing, Maine enrollment
- 110 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 4
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Central Maine Medical Center
Acute Care Hospitals · Lewiston, MEMount Desert Island Hospital
Critical Access Hospitals · Bar Harbor, MERumford Hospital
Critical Access Hospitals · Rumford, MEHoulton Regional Hospital
Critical Access Hospitals · Houlton, MEBridgton Hospital
Critical Access Hospitals · Bridgton, MEPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 04011 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.
BRUNSWICK, ME 04011
BRUNSWICK, ME 04011
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 Jonathan Grammer's NPI number?
The NPI number for Jonathan Grammer is 1003375189. It was assigned to this individual provider in the NPPES registry on March 18, 2019.
Where is Jonathan Grammer located?
Jonathan Grammer practices at 123 Medical Center Dr, Brunswick, ME 04011. The listed phone number is (207) 373-6000.
What is Jonathan Grammer's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Jonathan Grammer enrolled in Medicare?
Yes. Jonathan Grammer 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 Jonathan Grammer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jonathan Grammer reassigns Medicare benefits to 6 organizations: Bluewater Emergency Partners Of Brunswick, LLC (Brunswick, ME), Mount Desert Island Hospital (Southwest Harbor, ME), St. Joseph Hospital (Bangor, ME), Emergency Medicine Services Of Maine, LLC (Ellsworth, ME), Houlton Regional Hospital (Houlton, ME) and 1 more organization, listed in the Medicare section above. 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 Jonathan Grammer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Jonathan Grammer affiliated with any hospitals?
According to CMS data, Jonathan Grammer is affiliated with Central Maine Medical Center, Mount Desert Island Hospital, Rumford Hospital, Houlton Regional Hospital and Bridgton Hospital.
When was this NPI record last updated?
The NPPES record for Jonathan Grammer was last updated on April 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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. Jonathan Taylor Grammer, MD · NPI 1003375189
Emergency Medicine physician in Brunswick, Maine. Individual provider, active in the CMS NPPES registry since March 18, 2019.
## Identity
- **NPI:** 1003375189 (Entity type: Individual)
- **Enumerated:** March 18, 2019
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** MD25342 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** 123 MEDICAL CENTER DR, Brunswick, ME 04011-2652
- **Phone:** (207) 373-6000 · **Fax:** (207) 373-6080
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Bluewater Emergency Partners Of Brunswick, LLC (NPI 1043640204, Brunswick, ME); Mount Desert Island Hospital (NPI 1235553413, Southwest Harbor, ME); St. Joseph Hospital (NPI 1154321545, Bangor, ME); Emergency Medicine Services Of Maine, LLC (NPI 1578032058, Ellsworth, ME); Houlton Regional Hospital (NPI 1508823741, Houlton, ME); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of South Alabama College Of Medicine, class of 2019
## Record status
- **NPPES last updated:** April 6, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1003375189) · Data from the CMS NPPES public registry.