2026 NPPES data Internal Medicine Physician NPI 1649297110 MD, PH.D
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THOMAS SCHWARTZER, MD, PH.D

Internal Medicine Physician in SOMERSET, 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
7K
Medicare Part D claims · 638 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$601.46
35 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

THOMAS SCHWARTZER, MD, PH.D filed 7,347 Medicare Part D claims in 2023 as a Internal Medicine Physician in SOMERSET, New Jersey, prescribing 86% generic.

7K
Part D claims, 2023
86%
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.

THOMAS SCHWARTZER, MD, PH.D's Medicare Part D volume vs every U.S. prescriber

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

7,347 Top 3% higher than 97% 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%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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)

THOMAS SCHWARTZER, MD, PH.D 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 THOMAS SCHWARTZER, MD, PH.D?

Quality data not reported

NPI registry status

Active

Issued 07/17/2006

NPI 1649297110

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

7,347 171% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in New Jersey

How Internal Medicine Physician compares to other specialties among New Jersey providers

New Jersey providers

Internal Medicine Physician share within New Jersey

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Internal 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).

THOMAS SCHWARTZER, MD, PH.D appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD, PH.D credentials at 75 VERONICA AVE, SOMERSET, NJ, 08873, with a listed phone of (732) 828-0002. NPI 1649297110 was issued on 07/17/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SCHWARTZER 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 7,347 prescription claims written by this provider, covering 638 Medicare beneficiaries and totaling roughly $942K in drug spend, split 14% brand-name and 86% generic by claim count, with an opioid prescribing rate of 2.6%. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

75 VERONICA AVE
SOMERSET, NJ 08873

Provider Details

NPI 1649297110
Specialty Internal Medicine Physician
Credentials MD, PH.D
Gender Male
NPI Issued 07/17/2006

Hospital and facility affiliations

Facilities where THOMAS SCHWARTZER, MD, PH.D 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.

CENTRAL JERSEY INTERNAL MEDICINE ASSOCIATES,PA
MONROE TOWNSHIP, NJ

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

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for THOMAS SCHWARTZER, MD, PH.D. Source: openpaymentsdata.cms.gov.

Total received

$601

Largest payer

Exact Sciences Corporation

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Typical

THOMAS SCHWARTZER, MD, PH.D — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 7,347 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.

7,347
Total Claims
$942K
Total Drug Cost
638
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
17,687
Total Day Supply
522,011
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$784K
Generic Drug Cost
$156K
Opioid Claims
189 (2.6% rate)
Antibiotic Claims
121

Patient Demographics

Average Patient Age
77.4 years
Avg HCC Risk Score
1.26
Gender Split
57% female / 43% male
Age Distribution
<65: 13, 65-74: 236, 75-84: 264, 85+: 125

Top Prescribed Drugs (Medicare Part D)

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

What THOMAS SCHWARTZER, MD, PH.D 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
Rosuvastatin Calcium
459
Atorvastatin Calcium
348
Amlodipine Besylate
333
Levothyroxine Sodium
287
Metformin Hcl
203
Sertraline Hcl
181
Metoprolol Succinate
155
Losartan Potassium
141
Alprazolam
129
Escitalopram Oxalate
128

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

Internal Medicine Physician Overview

How THOMAS SCHWARTZER, MD, PH.D fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

THOMAS SCHWARTZER, MD, PH.D's 7,347 claims are above the specialty average of 2,716.

Nearby Internal 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 SCHWARTZER.

Compare Internal Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is THOMAS SCHWARTZER, MD, PH.D's specialty?
THOMAS SCHWARTZER, MD, PH.D specializes in Internal Medicine Physician and practices in SOMERSET, New Jersey. Credentials: MD, PH.D.
How much does THOMAS SCHWARTZER, MD, PH.D prescribe under Medicare Part D?
In 2023, THOMAS SCHWARTZER, MD, PH.D wrote 7,347 Medicare Part D claims totaling $942K in drug costs for 638 beneficiaries.
Where is THOMAS SCHWARTZER, MD, PH.D located?
THOMAS SCHWARTZER, MD, PH.D is located at 75 VERONICA AVE, SOMERSET, NJ, 08873. Phone: (732) 828-0002.
What is THOMAS SCHWARTZER, MD, PH.D's NPI number?
THOMAS SCHWARTZER, MD, PH.D's National Provider Identifier (NPI) is 1649297110, issued on 07/17/2006.
Does THOMAS SCHWARTZER, MD, PH.D prescribe more brand-name or generic drugs?
THOMAS SCHWARTZER, MD, PH.D's prescribing is 14% brand-name and 86% generic drugs by claim count, with $784K in brand drug costs.
Does THOMAS SCHWARTZER, MD, PH.D prescribe opioids?
Yes, THOMAS SCHWARTZER, MD, PH.D had 189 opioid claims in 2023 with an opioid prescribing rate of 2.6%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does THOMAS SCHWARTZER, MD, PH.D prescribe most often?
Based on 2023 Medicare Part D data, THOMAS SCHWARTZER, MD, PH.D's most frequently prescribed drugs include Rosuvastatin Calcium, Atorvastatin Calcium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS SCHWARTZER, MD, PH.D accept Medicare?
THOMAS SCHWARTZER, MD, PH.D appears in CMS Medicare data with 7,347 Part D claims and 638 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS SCHWARTZER, MD, PH.D's credentials?
THOMAS SCHWARTZER, MD, PH.D's NPI is 1649297110 with credentials MD, PH.D. 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