2026 NPPES data Pediatrics Physician NPI 1255590345 MD
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MARGEE LOUISIAS, MD

Pediatrics Physician in BOSTON, Massachusetts. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
472
Medicare Part D claims · 34 beneficiaries · Pediatrics Physician avg: 762
Generic prescribing
32%
generic claims · 68% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

MARGEE LOUISIAS, MD filed 472 Medicare Part D claims in 2023 as a Pediatrics Physician in BOSTON, Massachusetts, prescribing 32% generic.

472
Part D claims, 2023
32%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

MARGEE LOUISIAS, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

472 Top 38% higher than 62% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

MARGEE LOUISIAS, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about MARGEE LOUISIAS, MD?

Quality data not reported

NPI registry status

Active

Issued 06/04/2008

NPI 1255590345

Primary specialty

Pediatrics Physician

High-volume

80,574 US NPIs in this specialty

Medicare Part D claims

472 38% vs specialty avg

2023 prescription claims

Specialty avg: 762

Specialty distribution in Massachusetts

How Pediatrics Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Pediatrics Physician share within Massachusetts

1. Pediatrics Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Pediatrics Physician share within Massachusetts

Specialty board-certification context

Estimated specialty board-certified rate — Pediatrics Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Pediatrics Physician ABMS/AOA estimate

Est. board-certified rate (Pediatrics Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Pediatrics Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

MARGEE LOUISIAS, MD appears in the CMS NPPES registry as a Pediatrics Physician provider holding MD credentials at 1153 CENTRE ST, BOSTON, MA, 02130, with a listed phone of (617) 732-9850. NPI 1255590345 was issued on 06/04/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LOUISIAS most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 472 prescription claims written by this provider, covering 34 Medicare beneficiaries and totaling roughly $723K in drug spend, split 68% brand-name and 32% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Pediatrics Physician is a high-volume specialty nationwide, with 80,574 enrolled providers across 56 states and an average of 762 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

1153 CENTRE ST
BOSTON, MA 02130

Provider Details

NPI 1255590345
Specialty Pediatrics Physician
Credentials MD
Gender Female
NPI Issued 06/04/2008

Hospital and facility affiliations

Facilities where MARGEE LOUISIAS, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

BRIGHAM AND WOMENS PHYSICIANS ORGANIZATION INC
JAMAICA PLAIN, MA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

License & disciplinary context — Massachusetts BORIM 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 — they are NOT specific to MARGEE LOUISIAS, MD. To verify MARGEE LOUISIAS, MD's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases

BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Brand-heavy

MARGEE LOUISIAS, MD — brand share 68.0%
Specialty average (est.)

68% brand-name claims vs 32% generic, on 472 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

472
Total Claims
$723K
Total Drug Cost
34
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
723
Total Day Supply
20,651
Brand vs Generic
68% brand / 32% generic
Brand Drug Cost
$712K
Generic Drug Cost
$12K

Patient Demographics

Average Patient Age
67.5 years
Avg HCC Risk Score
1.27
Age Distribution
<65: 13, 65-74: 11, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What MARGEE LOUISIAS, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Symbicort
Budesonide/Formoterol Fumarate
62
Xolair
Omalizumab
43
Azelastine Hcl
34
Flovent Hfa
Fluticasone Propionate
34
Montelukast Sodium
32
Dupixent Pen
Dupilumab
28
Nucala
Mepolizumab
23
Fasenra Pen
Benralizumab
21
Fluticasone Propionate
21
Spiriva Respimat
Tiotropium Bromide
21

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Pediatrics Physician Overview

How MARGEE LOUISIAS, MD fits within the Pediatrics Physician landscape nationally.

80,574
Pediatrics Physician Providers in US
56
States with Pediatrics Physician
762
Avg Claims per Provider

MARGEE LOUISIAS, MD's 472 claims are below the specialty average of 762.

Nearby Pediatrics Physician Providers in Massachusetts

Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as LOUISIAS.

Compare Pediatrics Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is MARGEE LOUISIAS, MD's specialty?
MARGEE LOUISIAS, MD specializes in Pediatrics Physician and practices in BOSTON, Massachusetts. Credentials: MD.
How much does MARGEE LOUISIAS, MD prescribe under Medicare Part D?
In 2023, MARGEE LOUISIAS, MD wrote 472 Medicare Part D claims totaling $723K in drug costs for 34 beneficiaries.
Where is MARGEE LOUISIAS, MD located?
MARGEE LOUISIAS, MD is located at 1153 CENTRE ST, BOSTON, MA, 02130. Phone: (617) 732-9850.
What is MARGEE LOUISIAS, MD's NPI number?
MARGEE LOUISIAS, MD's National Provider Identifier (NPI) is 1255590345, issued on 06/04/2008.
Does MARGEE LOUISIAS, MD prescribe more brand-name or generic drugs?
MARGEE LOUISIAS, MD's prescribing is 68% brand-name and 32% generic drugs by claim count, with $712K in brand drug costs.
How many Pediatrics Physician providers are there in the US?
There are 80,574 Pediatrics Physician providers across 56 states in the US. The average Pediatrics Physician provider writes 762 Medicare Part D claims per year.
What drugs does MARGEE LOUISIAS, MD prescribe most often?
Based on 2023 Medicare Part D data, MARGEE LOUISIAS, MD's most frequently prescribed drugs include Symbicort, Xolair, Azelastine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARGEE LOUISIAS, MD accept Medicare?
MARGEE LOUISIAS, MD appears in CMS Medicare data with 472 Part D claims and 34 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARGEE LOUISIAS, MD's credentials?
MARGEE LOUISIAS, MD's NPI is 1255590345 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology