FRANK G. GUARNIERI M.D.
NPI 1609803238
Hospitalist in Damariscotta, ME
About Frank G. Guarnieri M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
FRANK G. GUARNIERI M.D. (NPI 1609803238) is an individual hospitalist provider in Damariscotta, Maine, licensed in Maine (016588) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Penobscot Bay Medical Center, and is a graduate of Johns Hopkins University School Of Medicine (1999).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 10
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
Frank G. Guarnieri 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 Reassignment
Medicare enrollment records show Frank Guarnieri reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Damariscotta, ME 04543
- Reassigned Medicare billing, Maine enrollment
- Also billed through NPI 1912094806 (Maine)
- 3,140 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 6
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.
Penobscot Bay Medical Center
Acute Care Hospitals · Rockport, MELincolnhealth
Critical Access Hospitals · Damariscotta, MEPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 04543 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 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DAMARISCOTTA, ME 04543
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 Frank Guarnieri's NPI number?
The NPI number for Frank Guarnieri is 1609803238. It was assigned to this individual provider in the NPPES registry on June 27, 2006.
Where is Frank Guarnieri located?
Frank Guarnieri practices at 35 Miles Street, Damariscotta, ME 04543. The listed phone number is (207) 563-4268.
What is Frank Guarnieri's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Frank Guarnieri enrolled in Medicare?
Yes. Frank Guarnieri 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 organization bills Medicare for Frank Guarnieri's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Frank Guarnieri reassigns Medicare benefits to Mainehealth (Damariscotta, ME). 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 Frank Guarnieri's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Frank Guarnieri accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Frank Guarnieri 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 Frank Guarnieri affiliated with any hospitals?
According to CMS data, Frank Guarnieri is affiliated with Penobscot Bay Medical Center and Lincolnhealth.
When was this NPI record last updated?
The NPPES record for Frank Guarnieri was last updated on April 30, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Frank G. Guarnieri, M.D. · NPI 1609803238
Hospitalist physician in Damariscotta, Maine. Individual provider, active in the CMS NPPES registry since June 27, 2006.
## Identity
- **NPI:** 1609803238 (Entity type: Individual)
- **Enumerated:** June 27, 2006
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 016588 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** 35 MILES STREET, Damariscotta, ME 04543-4047
- **Phone:** (207) 563-4268 · **Fax:** (207) 563-4103
## 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:** Mainehealth (NPI 1629558432, Damariscotta, ME), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Johns Hopkins University School Of Medicine, class of 1999
## Record status
- **NPPES last updated:** April 30, 2012
- **Other identifiers:** Other 01-0443255; Other 098415 (ME); Other AA71440; and 7 more
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Source: [NPI Profile](https://npiprofile.com/npi/1609803238) · Data from the CMS NPPES public registry.