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DR. THOMAS MELLOW M.D.
NPI 1003846361
Pediatrics - Pediatric Pulmonology in South Portland, ME

Active since July 03, 2006PECOS EnrolledAccepts Medicare Assignment
98.06/100
CMS Quality Rating
100 FODEN RD STE 103, SOUTH PORTLAND, ME 04106(207) 828-1122(207) 828-0188 Get Directions Write a Review

NPPES record last updated: March 24, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 24, 2026, Sep 30, 2024, Sep 4, 2024 (3 updates tracked since 2024).

About Dr. Thomas Mellow M.d. NPPES

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

DR. THOMAS MELLOW M.D. (NPI 1003846361) is an individual pediatric pulmonology provider in South Portland, Maine, licensed in Maine (016021) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Maine Medical Center, and is a graduate of University Of Virginia School Of Medicine (1992).

NPPES Registry Identity

NPI1003846361
Entity TypeIndividualMale
Primary Taxonomy2080P0214X
Provider Legal NameDR. THOMAS MELLOWCredential: M.D.
Location Address100 FODEN RD STE 103South Portland, ME 04106-2327
Mailing Address301 Us Route 1Scarborough, ME 04074-7609 · (207) 396-8600 · Fax (207) 396-8632
Phone(207) 828-1122
Fax(207) 828-0188
Sole ProprietorNo
Medical School CMSUniversity Of Virginia School Of MedicineGraduated 1992
Enumeration DateJuly 3, 2006
Last NPPES UpdateMarch 24, 20263 updates tracked since enumeration
NPPES CertifiedMarch 24, 2026
✔ NPI 1003846361 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric PulmonologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0214X
License✔ Licensed in ME · 016021
Definition
A pediatrician dedicated to the prevention and treatment of all respiratory diseases affecting infants, children and young adults. This specialist is knowledgeable about the growth and development of the lung, assessment of respiratory function in infants and children, and experienced in a variety of invasive and noninvasive diagnostic techniques.
Also ListedPediatricsTaxonomy 208000000X · License 016021 (ME)
100 FODEN RD STE 103, South Portland, ME 04106
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Other Identifiers 2

Medicaid30203388NH
Medicaid331790099ME

Accepted Insurance

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

Dr. Thomas Mellow 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 ID2163465535
PECOS Enrollment IDI20050607000256
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

6

Medicare enrollment records show Thomas Mellow reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Chest Medicine Associates, PA
Same address
Pulmonary Disease
100 FODEN ROAD, WEST BUILDING SUITE 103
South Portland, ME 04106
  • Reassigned Medicare billing, Maine enrollment
  • 40 clinicians in this Medicare group
NPI 1437255247 (207) 828-1122
Mainehealth
1.0 mi
Gynecology
100 BRICKHILL AVE
South Portland, ME 04106
  • Reassigned Medicare billing, Maine enrollment
  • 3,140 clinicians in this Medicare group
NPI 1679887400 (207) 775-1255
Maine Medical Partners
2.4 mi
Neurological Surgery
92 CAMPUS DRIVE, 1ST FLOOR
Scarborough, ME 04074
  • Reassigned Medicare billing, Maine enrollment
  • 188 clinicians in this Medicare group
NPI 1659351393 (207) 885-0011
Mainegeneral Medical Center
57 mi
General Acute Care Hospital
35 MEDICAL CENTER PARKWAY
Augusta, ME 04330
  • Reassigned Medicare billing, Maine enrollment
  • 978 clinicians in this Medicare group
NPI 1083949184 (207) 872-4454
Down East Community Hospital
159 mi
General Acute Care Hospital
RR 1 BOX 11
Machias, ME 04654
  • Reassigned Medicare billing, Maine enrollment
  • Also billed through NPI 1528087004 (Maine)
  • 120 clinicians in this Medicare group
NPI 1689670242 (207) 255-3356
Calais Community Hospital
185 mi
Medicare Defined Swing Bed Unit
24 HOSPITAL LN
Calais, ME 04619
  • Reassigned Medicare billing, Maine enrollment
  • 94 clinicians in this Medicare group
NPI 1376546143 (207) 454-7521

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

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

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.

98.06/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality86.13
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 16

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

DR. MEAGAN W MOORE MD, PHD
Internal Medicine (Pulmonary Disease)
100 FODEN RD STE 103
SOUTH PORTLAND, ME 04106
Cumberland County (207) 828-1122
CHEST MEDICINE ASSOCIATES, PA
Internal Medicine (Pulmonary Disease)
100 FODEN RD STE 103
SOUTH PORTLAND, ME 04106
Cumberland County (207) 828-1122
COLMAN JAMES HATTON MD
Internal Medicine (Critical Care Medicine)
100 FODEN RD STE 103
SOUTH PORTLAND, ME 04106
Cumberland County (207) 828-1122
MICHAEL JAEGER
Internal Medicine (Pulmonary Disease)
100 FODEN RD STE 103
SOUTH PORTLAND, ME 04106
Cumberland County (207) 828-1122
ADAM A ALTER MD
Internal Medicine (Pulmonary Disease)
100 FODEN RD STE 103
SOUTH PORTLAND, ME 04106
Cumberland County (207) 828-1122
MARIAN K PAULL APN
Nurse Practitioner (Adult Health)
100 FODEN RD STE 103
SOUTH PORTLAND, ME 04106
Cumberland County (207) 828-1122
DANIEL JOHN BULANOWSKI M.D.
Internal Medicine (Pulmonary Disease)
100 FODEN RD STE 103
SOUTH PORTLAND, ME 04106
Cumberland County (207) 828-1122
HEIDI A ROCHE MD
Internal Medicine (Critical Care Medicine)
100 FODEN RD STE 103
SOUTH PORTLAND, ME 04106
Cumberland County (207) 828-1122

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 Thomas Mellow's NPI number?

The NPI number for Thomas Mellow is 1003846361. It was assigned to this individual provider in the NPPES registry on July 3, 2006.

Where is Thomas Mellow located?

Thomas Mellow practices at 100 Foden Rd Ste 103, South Portland, ME 04106. The listed phone number is (207) 828-1122.

What is Thomas Mellow's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Pulmonology, with taxonomy code 2080P0214X.

Is Thomas Mellow enrolled in Medicare?

Yes. Thomas Mellow 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 Thomas Mellow's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Mellow reassigns Medicare benefits to 6 organizations: Chest Medicine Associates, PA (South Portland, ME), Mainehealth (South Portland, ME), Maine Medical Partners (Scarborough, ME), Mainegeneral Medical Center (Augusta, ME), Down East Community Hospital (Machias, 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 Thomas Mellow's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Thomas Mellow accept?

Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Thomas Mellow 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 Thomas Mellow affiliated with any hospitals?

According to CMS data, Thomas Mellow is affiliated with Maine Medical Center.

When was this NPI record last updated?

The NPPES record for Thomas Mellow was last updated on March 24, 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.