2026 NPPES data Clinical Psychologist NPI 1255991998
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MARY MILLER

Clinical Psychologist in NEWARK, Delaware. 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.
MIPS score
97.0218/100
▲ 14 pts above national avg 83.1 · [object Object]
What the federal data reveals: MARY MILLER is a Clinical Psychologist ([object Object]) practicing in NEWARK, Delaware . Their CMS MIPS Final Score of 97.0218/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: MARY MILLER reported a CMS MIPS final score of 97.0218 out of 100, above the 83.1 national average. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

MARY MILLER at a glance

High performer (top quartile)

NPI registry status

Active

Issued 06/15/2019

NPI 1255991998

Primary specialty

Clinical Psychologist

High-volume

62,855 US NPIs in this specialty

MIPS final score

97.0218/100 13.921800000000005% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Delaware

How Clinical Psychologist compares to other specialties among Delaware providers

Delaware providers

Clinical Psychologist share within Delaware

1. Clinical Psychologist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Clinical Psychologist share within Delaware

Medicare quality performance — MIPS

MARY MILLER's 2023 MIPS final score plotted against the Clinical Psychologist national average

High performer (top quartile)
MIPS Final Score
97.0218/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Clinical Psychologist) — 97.0218/100 vs national avg 83.1

0%100%National avg83%97%
MIPS final score (Clinical Psychologist) — 97.0218/100 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).

MARY MILLER is a Clinical Psychologist provider practicing in NEWARK, Delaware, according to the CMS National Plan and Provider Enumeration System (NPPES). NPI: 1255991998. 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.

MARY MILLER appears in the CMS NPPES registry as a Clinical Psychologist provider at 4735 OGLETOWN STANTON RD STE 2223, NEWARK, DE, 19713, with a listed phone of (302) 623-2943. NPI 1255991998 was issued on 06/15/2019. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MILLER 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 prescribing data is not currently published for this NPI, which typically means the provider either wrote fewer than 11 Part D claims in the most recent reporting year, does not participate in Medicare, or practices in a specialty that rarely prescribes outpatient drugs. Absence of prescribing data is not a quality signal — many Clinical Psychologist providers operate outside Part D entirely. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 97.0218/100 for the 2023 performance year (Quality 78.0983), compared with the national average of 83.1.

Clinical Psychologist is a high-volume specialty nationwide, with 62,855 enrolled providers across 56 states and an average of 615 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

4735 OGLETOWN STANTON RD STE 2223
NEWARK, DE 19713

Provider Details

NPI 1255991998
Specialty Clinical Psychologist
Gender Female
NPI Issued 06/15/2019

CMS Quality Score (MIPS)

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

97.0218
Final Score
Avg: 83.1
78.0983
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where MARY MILLER 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.

CHRISTIANA CARE HEALTH SERVICES INC
SMYRNA, DE

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

Clinical Psychologist Overview

How MARY MILLER fits within the Clinical Psychologist landscape nationally.

62,855
Clinical Psychologist Providers in US
56
States with Clinical Psychologist
615
Avg Claims per Provider

Nearby Clinical Psychologist Providers in Delaware

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

Compare Clinical Psychologist nationally: see state-by-state distribution →

Frequently Asked Questions

What is MARY MILLER's specialty?
MARY MILLER specializes in Clinical Psychologist and practices in NEWARK, Delaware.
What is MARY MILLER's Medicare quality score?
MARY MILLER has a CMS MIPS Final Score of 97.0218/100 (Quality: 78.0983). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is MARY MILLER located?
MARY MILLER is located at 4735 OGLETOWN STANTON RD STE 2223, NEWARK, DE, 19713. Phone: (302) 623-2943.
What is MARY MILLER's NPI number?
MARY MILLER's National Provider Identifier (NPI) is 1255991998, issued on 06/15/2019.
How many Clinical Psychologist providers are there in the US?
There are 62,855 Clinical Psychologist providers across 56 states in the US. The average Clinical Psychologist provider writes 615 Medicare Part D claims per year.
Does MARY MILLER accept Medicare?
MARY MILLER appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARY MILLER's credentials?
MARY MILLER's NPI is 1255991998. 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.
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