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MARSHALL ROB CHAMBERLIN MD
NPI 1003044488
Internal Medicine in Scarborough, ME

Active since June 24, 2009PECOS EnrolledAccepts Medicare Assignment
300 PROFESSIONAL DR, SUITE 2B, SCARBOROUGH, ME 04074(207) 883-3491(207) 885-5587 Get Directions Write a Review

NPPES record last updated: March 30, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 30, 2020, Apr 26, 2017, May 11, 2016 and 1 more (4 updates tracked since 2015).

About Marshall Rob Chamberlin Md NPPES

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

MARSHALL ROB CHAMBERLIN MD (NPI 1003044488) is an individual internal medicine provider in Scarborough, Maine, licensed in Maine (MD20716) and active in the NPI registry since June 2009. He is enrolled in Medicare PECOS, is affiliated with Maine Medical Center, and is a graduate of Boston University School Of Medicine (2009).

NPPES Registry Identity

NPI1003044488
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameMARSHALL ROB CHAMBERLINCredential: MD
Location Address300 PROFESSIONAL DR, SUITE 2BScarborough, ME 04074-8897
Mailing Address190 Riverside St, Suite 6bPortland, ME 04103-1073 · (207) 661-2000
Phone(207) 883-3491
Fax(207) 885-5587
Sole ProprietorNo
Medical School CMSBoston University School Of MedicineGraduated 2009
Enumeration DateJune 24, 2009
Last NPPES UpdateMarch 30, 20204 updates tracked since enumeration
NPPES CertifiedMarch 30, 2020
✔ NPI 1003044488 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in ME · MD20716
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedHospitalistTaxonomy 208M00000X · License MD20716 (ME)
300 PROFESSIONAL DR, Scarborough, ME 04074
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from NH Healthy Families, Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care and more.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

Marshall Rob Chamberlin 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.

PECOS PAC ID8426206863
PECOS Enrollment IDI20151022001228
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.

Medicare Billing Reassignments

2

Medicare enrollment records show Marshall Chamberlin reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Maine Medical Partners
Same address
Family Medicine
300 PROFESSIONAL DR
Scarborough, ME 04074
  • Reassigned Medicare billing, Maine enrollment
  • Also billed through NPI 1073527388 (Maine), NPI 1710215751 (Maine)
  • 206 clinicians in this Medicare group
NPI 1467477349 (207) 883-3491
Mainehealth
Same address
Family Medicine
300 PROFESSIONAL DR
Scarborough, ME 04074
  • Reassigned Medicare billing, Maine enrollment
  • 3,140 clinicians in this Medicare group
NPI 1497068969 (207) 883-3491

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 2

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.
35 services22 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.
14 services14 patients

Hospital Affiliations CMS Care Compare

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

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 04074 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
$128.83 typical visit price
range $56.28 – $169.96
Typical copayment $32.20 (range $14.07 – $42.49)
Most-billed visit code 99204
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.

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. JULIE LERNIHAN WALDROUP PHARMD, BCACP
Pharmacist (Ambulatory Care)
300 PROFESSIONAL DR
SCARBOROUGH, ME 04074
Cumberland County (207) 883-3491
DOUGLAS F. COWAN MD
Radiology (Diagnostic Radiology)
300 PROFESSIONAL DR
SCARBOROUGH, ME 04074
Cumberland County (207) 883-5295
MAINE MEDICAL PARTNERS
Internal Medicine
300 PROFESSIONAL DR
SCARBOROUGH, ME 04074
Cumberland County (207) 883-3491
ANNA MARIE BREWER RN,MSN,APRN,FNP-C
Nurse Practitioner (Family)
300 PROFESSIONAL DR
SCARBOROUGH, ME 04074
Cumberland County (207) 883-7926
DYLAN ATCHLEY
Internal Medicine
300 PROFESSIONAL DR
SCARBOROUGH, ME 04074
Cumberland County (207) 883-3491
MAINE MEDICAL PARTNERS
Family Medicine
300 PROFESSIONAL DR
SCARBOROUGH, ME 04074
Cumberland County (207) 883-3491
MAINEHEALTH
Family Medicine
300 PROFESSIONAL DR
SCARBOROUGH, ME 04074
Cumberland County (207) 883-3491
JOSEPH T DEGRINNEY III M.D.
Internal Medicine
300 PROFESSIONAL DR
SCARBOROUGH, ME 04074
Cumberland County (207) 883-3491

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 Marshall Chamberlin's NPI number?

The NPI number for Marshall Chamberlin is 1003044488. It was assigned to this individual provider in the NPPES registry on June 24, 2009.

Where is Marshall Chamberlin located?

Marshall Chamberlin practices at 300 Professional Dr Suite 2B, Scarborough, ME 04074. The listed phone number is (207) 883-3491.

What is Marshall Chamberlin's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Marshall Chamberlin enrolled in Medicare?

Yes. Marshall Chamberlin 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 Marshall Chamberlin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marshall Chamberlin reassigns Medicare benefits to 2 organizations: Maine Medical Partners (Scarborough, ME) and Mainehealth (Scarborough, ME). 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 Marshall Chamberlin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marshall Chamberlin accept?

Health plans from Ambetter from NH Healthy Families, Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care and Taro Health list Marshall Chamberlin 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 Marshall Chamberlin affiliated with any hospitals?

According to CMS data, Marshall Chamberlin is affiliated with Maine Medical Center.

When was this NPI record last updated?

The NPPES record for Marshall Chamberlin was last updated on March 30, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.