2026 NPPES data Gastroenterology Physician NPI 1821053000 M.D.
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THOMAS LI, M.D.

Gastroenterology Physician in FORT LEE, 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
287
Medicare Part D claims · 99 beneficiaries · Gastroenterology Physician avg: 833
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

THOMAS LI, M.D. filed 287 Medicare Part D claims in 2023 as a Gastroenterology Physician in FORT LEE, New Jersey, prescribing 91% generic.

287
Part D claims, 2023
91%
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.

THOMAS LI, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

287 49th percentile higher than 49% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 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-eligible specialty (heuristic — not verified)

THOMAS LI, M.D. 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 THOMAS LI, M.D.?

Quality data not reported

NPI registry status

Active

Issued 04/19/2006

NPI 1821053000

Primary specialty

Gastroenterology Physician

Mid-sized

16,567 US NPIs in this specialty

Medicare Part D claims

287 66% vs specialty avg

2023 prescription claims

Specialty avg: 833

Specialty distribution in New Jersey

How Gastroenterology Physician compares to other specialties among New Jersey providers

New Jersey providers

Gastroenterology Physician share within New Jersey

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Gastroenterology 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 LI, M.D. appears in the CMS NPPES registry as a Gastroenterology Physician provider holding M.D. credentials at 2231 LEMOINE AVE, FORT LEE, NJ, 07024, with a listed phone of (201) 944-1008. NPI 1821053000 was issued on 04/19/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LI 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 287 prescription claims written by this provider, covering 99 Medicare beneficiaries and totaling roughly $8K in drug spend, split 9% brand-name and 91% 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.

Gastroenterology Physician is a mid-sized specialty nationwide, with 16,567 enrolled providers across 54 states and an average of 833 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

2231 LEMOINE AVE
FORT LEE, NJ 07024

Provider Details

NPI 1821053000
Specialty Gastroenterology Physician
Credentials M.D.
Gender Male
NPI Issued 04/19/2006

Brand vs generic prescribing mix · Generic-heavy

THOMAS LI, M.D. — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 287 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.

287
Total Claims
$8K
Total Drug Cost
99
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
712
Total Day Supply
19,438
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$1K
Generic Drug Cost
$7K

Patient Demographics

Average Patient Age
72.2 years
Avg HCC Risk Score
0.71
Gender Split
54% female / 46% male

Top Prescribed Drugs (Medicare Part D)

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

What THOMAS LI, M.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
Atorvastatin Calcium
57
Amlodipine Besylate
38
Peg 3350-Electrolyte
Sodium Chloride/Nahco3/Kcl/Peg
27
Losartan Potassium
25
Metformin Hcl
17
Enalapril Maleate
16
Gavilyte-G
"Peg3350/Sod Sulf
N/A
Sod Sulf-Potass Sulf-Mag Sulf
"Sodium
N/A

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

Gastroenterology Physician Overview

How THOMAS LI, M.D. fits within the Gastroenterology Physician landscape nationally.

16,567
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider

THOMAS LI, M.D.'s 287 claims are below the specialty average of 833.

Nearby Gastroenterology Physician Providers in New Jersey

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

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

Frequently Asked Questions

What is THOMAS LI, M.D.'s specialty?
THOMAS LI, M.D. specializes in Gastroenterology Physician and practices in FORT LEE, New Jersey. Credentials: M.D..
How much does THOMAS LI, M.D. prescribe under Medicare Part D?
In 2023, THOMAS LI, M.D. wrote 287 Medicare Part D claims totaling $8K in drug costs for 99 beneficiaries.
Where is THOMAS LI, M.D. located?
THOMAS LI, M.D. is located at 2231 LEMOINE AVE, FORT LEE, NJ, 07024. Phone: (201) 944-1008.
What is THOMAS LI, M.D.'s NPI number?
THOMAS LI, M.D.'s National Provider Identifier (NPI) is 1821053000, issued on 04/19/2006.
Does THOMAS LI, M.D. prescribe more brand-name or generic drugs?
THOMAS LI, M.D.'s prescribing is 9% brand-name and 91% generic drugs by claim count, with $1K in brand drug costs.
How many Gastroenterology Physician providers are there in the US?
There are 16,567 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 833 Medicare Part D claims per year.
What drugs does THOMAS LI, M.D. prescribe most often?
Based on 2023 Medicare Part D data, THOMAS LI, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Peg 3350-Electrolyte. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does THOMAS LI, M.D. accept Medicare?
THOMAS LI, M.D. appears in CMS Medicare data with 287 Part D claims and 99 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify THOMAS LI, M.D.'s credentials?
THOMAS LI, M.D.'s NPI is 1821053000 with credentials M.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