2026 NPPES data Public Health & General Preventive Medicine Physician NPI 1558357996 MD
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ELIZABETH CLARK, MD

Public Health & General Preventive Medicine Physician in NEW BRUNSWICK, New Jersey. 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
1K
Medicare Part D claims · 155 beneficiaries · Public Health & General Preventive Medicine Physician avg: 968
Generic prescribing
85%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

ELIZABETH CLARK, MD filed 1,134 Medicare Part D claims in 2023 as a Public Health & General Preventive Medicine Physician in NEW BRUNSWICK, New Jersey, prescribing 85% generic.

1K
Part D claims, 2023
85%
generic prescribing

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.

ELIZABETH CLARK, MD's Medicare Part D volume vs every U.S. prescriber

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

1,134 Top 23% higher than 77% 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%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). This entry sits in this band. 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-eligible specialty (heuristic — not verified)

ELIZABETH CLARK, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about ELIZABETH CLARK, MD?

Quality data not reported

NPI registry status

Active

Issued 09/21/2005

NPI 1558357996

Primary specialty

Public Health & General Preventive Medicine Physician

Niche

1,764 US NPIs in this specialty

Medicare Part D claims

1,134 17% vs specialty avg

2023 prescription claims

Specialty avg: 968

Specialty distribution in New Jersey

How Public Health & General Preventive Medicine Physician compares to other specialties among New Jersey providers

New Jersey providers

Public Health & General Preventive Medicine Physician share within New Jersey

1. Public Health & General Preventive Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Public Health & General Preventive Medicine Physician share within New Jersey

Specialty board-certification context

Estimated specialty board-certified rate — Public Health & General Preventive Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Public Health & General Preventive Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Public Health & General Preventive Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Public Health & General Preventive Medicine 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).

ELIZABETH CLARK, MD appears in the CMS NPPES registry as a Public Health & General Preventive Medicine Physician provider holding MD credentials at 317 GEORGE ST, NEW BRUNSWICK, NJ, 08901, with a listed phone of (732) 235-8993. NPI 1558357996 was issued on 09/21/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CLARK 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 1,134 prescription claims written by this provider, covering 155 Medicare beneficiaries and totaling roughly $105K in drug spend, split 15% brand-name and 85% 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.

Public Health & General Preventive Medicine Physician is a narrow specialty nationwide, with 1,764 enrolled providers across 52 states and an average of 968 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

317 GEORGE ST
NEW BRUNSWICK, NJ 08901

Provider Details

NPI 1558357996
Specialty Public Health & General Preventive Medicine Physician
Credentials MD
Gender Female
NPI Issued 09/21/2005

Brand vs generic prescribing mix · Typical

ELIZABETH CLARK, MD — brand share 15.0%
Specialty average (est.)

15% brand-name claims vs 85% generic, on 1,134 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.

1,134
Total Claims
$105K
Total Drug Cost
155
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,199
Total Day Supply
63,787
Brand vs Generic
15% brand / 85% generic
Brand Drug Cost
$75K
Generic Drug Cost
$29K
Antibiotic Claims
13

Patient Demographics

Average Patient Age
69.0 years
Avg HCC Risk Score
1.24
Gender Split
68% female / 32% male
Age Distribution
<65: 36, 65-74: 76, 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 ELIZABETH CLARK, 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
Atorvastatin Calcium
119
Levothyroxine Sodium
67
Amlodipine Besylate
65
Lisinopril
34
Alendronate Sodium
31
Metformin Hcl
31
Fluticasone Propionate
24
Esomeprazole Magnesium
23
Famotidine
23
Hydrochlorothiazide
22

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

Public Health & General Preventive Medicine Physician Overview

How ELIZABETH CLARK, MD fits within the Public Health & General Preventive Medicine Physician landscape nationally.

1,764
Public Health & General Preventive Medicine Physician Providers in US
52
States with Public Health & General Preventive Medicine Physician
968
Avg Claims per Provider

ELIZABETH CLARK, MD's 1,134 claims are above the specialty average of 968.

Nearby Public Health & General Preventive Medicine Physician Providers in New Jersey

Other clinicians with the same primary specialty enrolled in New Jersey, drawn from the same CMS NPPES roster as CLARK.

Compare Public Health & General Preventive Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ELIZABETH CLARK, MD's specialty?
ELIZABETH CLARK, MD specializes in Public Health & General Preventive Medicine Physician and practices in NEW BRUNSWICK, New Jersey. Credentials: MD.
How much does ELIZABETH CLARK, MD prescribe under Medicare Part D?
In 2023, ELIZABETH CLARK, MD wrote 1,134 Medicare Part D claims totaling $105K in drug costs for 155 beneficiaries.
Where is ELIZABETH CLARK, MD located?
ELIZABETH CLARK, MD is located at 317 GEORGE ST, NEW BRUNSWICK, NJ, 08901. Phone: (732) 235-8993.
What is ELIZABETH CLARK, MD's NPI number?
ELIZABETH CLARK, MD's National Provider Identifier (NPI) is 1558357996, issued on 09/21/2005.
Does ELIZABETH CLARK, MD prescribe more brand-name or generic drugs?
ELIZABETH CLARK, MD's prescribing is 15% brand-name and 85% generic drugs by claim count, with $75K in brand drug costs.
How many Public Health & General Preventive Medicine Physician providers are there in the US?
There are 1,764 Public Health & General Preventive Medicine Physician providers across 52 states in the US. The average Public Health & General Preventive Medicine Physician provider writes 968 Medicare Part D claims per year.
What drugs does ELIZABETH CLARK, MD prescribe most often?
Based on 2023 Medicare Part D data, ELIZABETH CLARK, MD's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ELIZABETH CLARK, MD accept Medicare?
ELIZABETH CLARK, MD appears in CMS Medicare data with 1,134 Part D claims and 155 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ELIZABETH CLARK, MD's credentials?
ELIZABETH CLARK, MD's NPI is 1558357996 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