HOSPITAL MEDICINE SERVICES OF MAINE LLC
NPI 1538638432
Hospitalist in Ellsworth, ME

Active since November 20, 2018
50 UNION ST, ELLSWORTH, ME 04605(865) 693-1000 Get Directions Write a Review

NPPES record last updated: September 16, 2019. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 16, 2019, Nov 21, 2018 (2 updates tracked since 2018).

About Hospital Medicine Services Of Maine Llc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

HOSPITAL MEDICINE SERVICES OF MAINE LLC (NPI 1538638432) is a healthcare organization registered as a hospitalist in Ellsworth, Maine and active in the NPI registry since November 2018. The organization maintains 3 additional practice locations and lists David J Istvan, President, as its authorized official.

NPPES Registry Identity

NPI1538638432
Entity TypeOrganization
Primary Taxonomy208M00000X
Legal Business NameHOSPITAL MEDICINE SERVICES OF MAINE LLC
Location Address50 UNION STEllsworth, ME 04605-1534
Mailing Address265 Brookview Centre Way Ste 400Knoxville, TN 37919-4052
Organization SubpartNo
Authorized OfficialDavid J IstvanPresident · (917) 679-1675
Enumeration DateNovember 20, 2018
Last NPPES UpdateSeptember 16, 20192 updates tracked since enumeration
✔ NPI 1538638432 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
50 UNION ST, Ellsworth, ME 04605

Secondary Practice Locations 3

Location 157 Water StBlue Hill, ME 04614-5231 · Phone (865) 693-1000
Location 2200 Kennedy Memorial DrWaterville, ME 04901-4526 · Phone (865) 693-1000
Location 3447 N Main StPittsfield, ME 04967-1199 · Phone (865) 693-1000

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Hospital Medicine Services Of Maine Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

99

Medicare enrollment records show 99 clinicians reassign Medicare billing to Hospital Medicine Services Of Maine LLC, which bills Medicare for the services they deliver. Of these, 7 practice at this address and 8 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 9

Internal Medicine54
Nurse Practitioner20
Family Practice9
Hospitalist9
Emergency Medicine3
General Practice1
Hospice/Palliative Care1
Osteopathic Manipulative Medicine1
1 other specialty1

Nearest to this location (20)

See all 99
General Practice
NPI 1033341813
50 UNION ST
Ellsworth, ME 04605
(207) 664-5311
✔ PECOS✔ Accepts MedicareSame address
Internal Medicine
NPI 1407060189
50 UNION ST
Ellsworth, ME 04605
(207) 664-5311
✔ PECOS✔ Accepts MedicareSame address
Nurse Practitioner
NPI 1548081953
50 UNION ST
Ellsworth, ME 04605
(207) 664-5311
✔ PECOS✔ Accepts MedicareSame address
Internal Medicine
NPI 1962906198
50 UNION ST
Ellsworth, ME 04605
(207) 664-5311
✔ PECOS✔ Accepts MedicareSame address
Nurse Practitioner
NPI 1386399830
50 UNION ST
Ellsworth, ME 04605
(207) 664-5311
✔ PECOS✔ Accepts MedicareSame address
Osteopathic Manipulative Medicine
NPI 1396240800
50 UNION ST
Ellsworth, ME 04605
(207) 664-5311
✔ PECOS✔ Accepts MedicareSame address
Hospitalist
NPI 1922028976
50 UNION ST MAINE COAST MEMORIAL HOSPITAL
Ellsworth, ME 04605
(207) 664-5304
✔ PECOS✔ Accepts MedicareSame address
Nurse Practitioner
NPI 1629539838
190 BANGOR RD
Ellsworth, ME 04605
(207) 888-2058
✔ PECOS2.4 mi
Internal Medicine
NPI 1780248054
57 WATER ST
Blue Hill, ME 04614
(207) 374-3400
✔ PECOS✔ Accepts Medicare13 mi
Internal Medicine
NPI 1659953933
57 WATER ST
Blue Hill, ME 04614
(207) 374-3400
✔ PECOS✔ Accepts Medicare13 mi
Nurse Practitioner
NPI 1194075135
992 UNION ST
Bangor, ME 04401
(207) 992-2601
✔ PECOS✔ Accepts Medicare27 mi
Nurse Practitioner
NPI 1851742472
1012 UNION ST
Bangor, ME 04401
(207) 404-8200
✔ PECOS✔ Accepts Medicare27 mi
Internal Medicine
NPI 1710392485
118 NORTHPORT AVE
Belfast, ME 04915
(207) 338-2500
✔ PECOS✔ Accepts Medicare30 mi
Internal Medicine
NPI 1235261827
118 NORTHPORT AVE
Belfast, ME 04915
(207) 338-2500
✔ PECOS✔ Accepts Medicare30 mi
Family Practice
NPI 1215968144
6 GLEN COVE DR
Rockport, ME 04856
(207) 302-8542
✔ PECOS✔ Accepts Medicare41 mi
Hospitalist
NPI 1417339854
447 N MAIN ST
Pittsfield, ME 04967
(419) 324-6733
✔ PECOS✔ Accepts Medicare51 mi
Emergency Medicine
NPI 1144228073
51 HIGH ST SUITE A
Dexter, ME 04930
(207) 924-7349
✔ PECOS✔ Accepts Medicare54 mi
Family Practice
NPI 1760912885
135 PARK ST
Milo, ME 04463
(207) 943-7752
✔ PECOS✔ Accepts Medicare57 mi
Hospitalist
NPI 1881006831
135 PARK ST
Milo, ME 04463
(207) 943-7752
✔ PECOS✔ Accepts Medicare57 mi
Hospice/Palliative Care
NPI 1598794505
35 MILES ST
Damariscotta, ME 04543
(207) 661-2018
✔ PECOS✔ Accepts Medicare66 mi
See all 99 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Hospital Medicine Services Of Maine LLC's NPI number?

The NPI number for Hospital Medicine Services Of Maine LLC is 1538638432. It was assigned to this organization in the NPPES registry on November 20, 2018.

Where is Hospital Medicine Services Of Maine LLC located?

Hospital Medicine Services Of Maine LLC is located at 50 Union St, Ellsworth, ME 04605. The listed phone number is (865) 693-1000.

What is Hospital Medicine Services Of Maine LLC's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Hospital Medicine Services Of Maine LLC enrolled in Medicare?

Yes. Hospital Medicine Services Of Maine LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Hospital Medicine Services Of Maine LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 99 clinicians in 9 Medicare specialties reassign their Medicare billing to Hospital Medicine Services Of Maine LLC. A 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 the clinician's services. The largest specialties are Internal Medicine (54), Nurse Practitioner (20) and Family Practice (9). Of these, 7 practice at this address and 8 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Hospital Medicine Services Of Maine LLC accept?

Health plans from Anthem Blue Cross and Blue Shield list Hospital Medicine Services Of Maine LLC 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 Hospital Medicine Services Of Maine LLC was last updated on September 16, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.