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DR. ABBY A MARKHAM MD
NPI 1164718540
Pediatrics in Portland, ME

Active since June 23, 2011PECOS Enrolled
22 BRAMHALL STREET, MAINE MEDICAL CENTER DEPT OF PEDIATRICS, PORTLAND, ME 04103(207) 662-2541(207) 662-3172 Get Directions Write a Review

NPPES record last updated: December 22, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Abby A Markham Md NPPES

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

DR. ABBY A MARKHAM MD (NPI 1164718540) is an individual pediatrics provider in Portland, Maine, licensed in Maine (MD20135) and active in the NPI registry since June 2011. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1164718540
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameDR. ABBY A MARKHAMCredential: MD
Location Address22 BRAMHALL STREET, MAINE MEDICAL CENTER DEPT OF PEDIATRICSPortland, ME 04103
Mailing Address22 Bramhall Street, Maine Medical Center Dept Of PediatricsPortland, ME 04102 · (207) 662-2541 · Fax (207) 662-3172
Phone(207) 662-2541
Fax(207) 662-3172
Sole ProprietorNo
Enumeration DateJune 23, 2011
Last NPPES UpdateDecember 22, 2014
✔ NPI 1164718540 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in ME · MD20135
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
22 BRAMHALL STREET, Portland, ME 04103
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Other Names 1

Other Name (5)Abby Gross

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 (PECOS)

Dr. Abby A Markham Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Abby Markham reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mainehealth
1.4 mi
Otolaryngology
1250 FOREST AVE
Portland, ME 04103
  • Reassigned Medicare billing, Maine enrollment
  • 3,140 clinicians in this Medicare group
NPI 1649577768 (207) 797-5753
Maine Medical Partners
2.5 mi
Pediatric Surgery
887 CONGRESS ST, SUITE 300
Portland, ME 04102
  • Reassigned Medicare billing, Maine enrollment
  • 188 clinicians in this Medicare group
NPI 1134305386 (207) 662-5555

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 04103 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.

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 Abby Markham's NPI number?

The NPI number for Abby Markham is 1164718540. It was assigned to this individual provider in the NPPES registry on June 23, 2011. The provider is also known as Abby Gross.

Where is Abby Markham located?

Abby Markham practices at 22 Bramhall Street Maine Medical Center Dept Of Pediatrics, Portland, ME 04103. The listed phone number is (207) 662-2541.

What is Abby Markham's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Abby Markham enrolled in Medicare?

Yes. Abby Markham is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Abby Markham's services?

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

What insurance does Abby Markham accept?

Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Abby Markham 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 Abby Markham was last updated on December 22, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.