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STEPHEN ROSS BARTER M.D.
NPI 1689779092
Family Medicine in Naples, ME

Active since September 13, 2006PECOS EnrolledAccepts Medicare AssignmentCLIA 20D0088002 · Waiver
79.37/100
CMS Quality Rating
4 MESERVE STREET, NAPLES PROFESSIONAL CENTER, NAPLES, ME 04055(207) 693-3912(207) 693-3453 Get Directions Write a Review

NPPES record last updated: June 2, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jun 2, 2025, Oct 1, 2024, Jun 17, 2024 and 1 more (4 updates tracked since 2024).

About Stephen Ross Barter M.d. NPPES

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

STEPHEN ROSS BARTER M.D. (NPI 1689779092) is an individual family medicine provider in Naples, Maine, licensed in Maine (11337) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through August 30, 2026, and is affiliated with Northern Light Health.

NPPES Registry Identity

NPI1689779092
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameSTEPHEN ROSS BARTERCredential: M.D.
Location Address4 MESERVE STREET, NAPLES PROFESSIONAL CENTERNaples, ME 04055-5349
Mailing AddressPo Box 1515, 4 Meserve StNaples, ME 04055 · (207) 693-3912 · Fax (207) 693-3453
Phone(207) 693-3912
Fax(207) 693-3453
Sole ProprietorYes
Medical School CMSTufts University School Of MedicineGraduated 1981
Enumeration DateSeptember 13, 2006
Last NPPES UpdateJune 2, 20254 updates tracked since enumeration
NPPES CertifiedMay 19, 2025
✔ NPI 1689779092 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in ME · 11337
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
4 MESERVE STREET, Naples, ME 04055
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Other Identifiers 2

Medicaid203770000ME
Other000173ME · Anthem Star Id

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Stephen Ross Barter 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.

PECOS PAC ID547208936
PECOS Enrollment IDI20050418000372
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 20D0088002

Stephen R Barter MD · Naples, ME
Active · expires Aug 30, 2026
CLIA Number20D0088002
Laboratory TypePhysician Office
Certificate Effective DateAugust 31, 2024
Certificate Expiration DateAugust 30, 2026
Laboratory DirectorStephen R. Barter
Laboratory Phone(207) 693-3912
Laboratory LocationStephen R Barter MDNaples Professional Center 4 Meserve Street PO Box 1515, Naples, ME 04055
CLIA data matches this NPI record on: Phone
This certificate is issued to a laboratory to perform only waived tests.

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
161 services103 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
159 services98 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
89 services89 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
74 services55 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
53 services52 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
49 services48 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northern Light Health

Acute Care Hospitals · Portland, ME
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number200008
Location144 State StreetPortland, ME 04101 · Cumberland County
Emergency services Birthing friendly

Maine Medical Center

Acute Care Hospitals · Portland, ME
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number200009
Location22 Bramhall StPortland, ME 04102 · Cumberland County
Emergency services Birthing friendly

Bridgton Hospital

Critical Access Hospitals · Bridgton, ME
OwnershipVoluntary non-profit - Private
CMS Certification Number201310
Location10 Hospital DriveBridgton, ME 04009 · Cumberland County
Emergency services

Stephens Memorial Hospital

Critical Access Hospitals · Norway, ME
OwnershipVoluntary non-profit - Private
CMS Certification Number201315
Location181 Main StreetNorway, ME 04268 · Oxford County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 04055 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$86.72 typical visit price
range $56.28 – $169.96
Typical copayment $21.68 (range $14.07 – $42.49)
Most-billed visit code 99203
Established Patient
$99.18 typical visit price
range $18.22 – $138.92
Typical copayment $24.79 (range $4.55 – $34.73)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

79.37/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality57.66
Promoting Interoperability99
Improvement Activities40

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
6 suppliers20 claims53 services$4.37 avg. paid by Medicare
Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
1 supplier23 claims23 services$14.49 avg. paid by Medicare
Nebulizer, with compressor E0570
DME-Other DME · category DE000N
1 supplier11 claims11 services$6.22 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
1 supplier23 claims23 services$79.60 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Stephen Barter's NPI number?

The NPI number for Stephen Barter is 1689779092. It was assigned to this individual provider in the NPPES registry on September 13, 2006.

Where is Stephen Barter located?

Stephen Barter practices at 4 Meserve Street Naples Professional Center, Naples, ME 04055. The listed phone number is (207) 693-3912.

What is Stephen Barter's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Stephen Barter enrolled in Medicare?

Yes. Stephen Barter 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.

Does Stephen Barter hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 20D0088002) is associated with this NPI, valid through August 30, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Stephen Barter accept?

Health plans from Anthem Blue Cross and Blue Shield list Stephen Barter 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 Stephen Barter affiliated with any hospitals?

According to CMS data, Stephen Barter is affiliated with Northern Light Health, Maine Medical Center, Bridgton Hospital and Stephens Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Stephen Barter was last updated on June 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.