2026 NPPES data Hospitalist Physician NPI 1023570074 DO
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CATHERINE FREEMAN, DO

Hospitalist Physician in PORTLAND, Maine. 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
93
Medicare Part D claims · 39 beneficiaries · Hospitalist Physician avg: 888
MIPS score
98.0699/100
▲ 15 pts above national avg 83.1 · [object Object]
What the federal data reveals: CATHERINE FREEMAN, DO is a Hospitalist Physician ([object Object]) practicing in PORTLAND, Maine with a Medicare Part D prescribing footprint of 93 claims across 39 beneficiaries . Their CMS MIPS Final Score of 98.0699/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: CATHERINE FREEMAN, DO reported a CMS MIPS final score of 98.0699 out of 100, above the 83.1 national average, and filed 93 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

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

CATHERINE FREEMAN, DO at a glance

High performer (top quartile)

NPI registry status

Active

Issued 04/01/2019

NPI 1023570074

Primary specialty

Hospitalist Physician

Mid-sized

16,825 US NPIs in this specialty

Medicare Part D claims

93 90% vs specialty avg

2023 prescription claims

Specialty avg: 888

MIPS final score

98.0699/100 14.96990000000001% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Maine

How Hospitalist Physician compares to other specialties among Maine providers

Maine providers

Hospitalist Physician share within Maine

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

Medicare quality performance — MIPS

CATHERINE FREEMAN, DO's 2023 MIPS final score plotted against the Hospitalist Physician national average

High performer (top quartile)
MIPS Final Score
98.0699/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Hospitalist Physician) — 98.0699/100 vs national avg 83.1

0%100%National avg83%98.1%
MIPS final score (Hospitalist Physician) — 98.0699/100 vs national avg 83.1

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).

CATHERINE FREEMAN, DO is a Hospitalist Physician provider practicing in PORTLAND, Maine, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: DO. NPI: 1023570074. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

CATHERINE FREEMAN, DO appears in the CMS NPPES registry as a Hospitalist Physician provider holding DO credentials at 22 BRAMHALL ST, PORTLAND, ME, 04102, with a listed phone of (207) 662-4618. NPI 1023570074 was issued on 04/01/2019. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FREEMAN 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 93 prescription claims written by this provider, covering 39 Medicare beneficiaries and totaling roughly $5K in drug spend. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 98.0699/100 for the 2023 performance year (Quality 86.1398), compared with the national average of 83.1.

Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 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

22 BRAMHALL ST
PORTLAND, ME 04102

Provider Details

NPI 1023570074
Specialty Hospitalist Physician
Credentials DO
Gender Female
NPI Issued 04/01/2019

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

98.0699
Final Score
Avg: 83.1
86.1398
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where CATHERINE FREEMAN, DO 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.

MAINEHEALTH
PORTLAND, ME

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

Medicare Part D Prescribing Data

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

93
Total Claims
$5K
Total Drug Cost
39
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
106
Total Day Supply
2,221
Generic Drug Cost
$2K
Antibiotic Claims
23

Patient Demographics

Average Patient Age
73.9 years
Avg HCC Risk Score
2.47
Gender Split
49% female / 51% male

Hospitalist Physician Overview

How CATHERINE FREEMAN, DO fits within the Hospitalist Physician landscape nationally.

16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider

CATHERINE FREEMAN, DO's 93 claims are below the specialty average of 888.

Nearby Hospitalist Physician Providers in Maine

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

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

Frequently Asked Questions

What is CATHERINE FREEMAN, DO's specialty?
CATHERINE FREEMAN, DO specializes in Hospitalist Physician and practices in PORTLAND, Maine. Credentials: DO.
How much does CATHERINE FREEMAN, DO prescribe under Medicare Part D?
In 2023, CATHERINE FREEMAN, DO wrote 93 Medicare Part D claims totaling $5K in drug costs for 39 beneficiaries.
What is CATHERINE FREEMAN, DO's Medicare quality score?
CATHERINE FREEMAN, DO has a CMS MIPS Final Score of 98.0699/100 (Quality: 86.1398). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is CATHERINE FREEMAN, DO located?
CATHERINE FREEMAN, DO is located at 22 BRAMHALL ST, PORTLAND, ME, 04102. Phone: (207) 662-4618.
What is CATHERINE FREEMAN, DO's NPI number?
CATHERINE FREEMAN, DO's National Provider Identifier (NPI) is 1023570074, issued on 04/01/2019.
How many Hospitalist Physician providers are there in the US?
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
Does CATHERINE FREEMAN, DO accept Medicare?
CATHERINE FREEMAN, DO appears in CMS Medicare data with 93 Part D claims and 39 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CATHERINE FREEMAN, DO's credentials?
CATHERINE FREEMAN, DO's NPI is 1023570074 with credentials DO. 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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