2026 NPPES data Hepatology Physician NPI 1104858638 M.D.;MPH
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DARYL LAU, M.D.;MPH

Hepatology Physician in BOSTON, Massachusetts. 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
378
Medicare Part D claims · 57 beneficiaries · Hepatology Physician avg: 803
Generic prescribing
40%
generic claims · 60% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$13.4K
24 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

DARYL LAU, M.D.;MPH filed 378 Medicare Part D claims in 2023 as a Hepatology Physician in BOSTON, Massachusetts, prescribing 40% generic.

378
Part D claims, 2023
40%
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.

DARYL LAU, M.D.;MPH's Medicare Part D volume vs every U.S. prescriber

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

378 Top 43% higher than 57% 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 certification likely (heuristic — not verified)

DARYL LAU, M.D.;MPH 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 DARYL LAU, M.D.;MPH?

Quality data not reported

NPI registry status

Active

Issued 07/07/2006

NPI 1104858638

Primary specialty

Hepatology Physician

Rare

281 US NPIs in this specialty

Medicare Part D claims

378 53% vs specialty avg

2023 prescription claims

Specialty avg: 803

Specialty distribution in Massachusetts

How Hepatology Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Hepatology Physician share within Massachusetts

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

Specialty board-certification context

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

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

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

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

DARYL LAU, M.D.;MPH appears in the CMS NPPES registry as a Hepatology Physician provider holding M.D.;MPH credentials at 110 FRANCIS ST, BOSTON, MA, 02215, with a listed phone of (617) 632-1098. NPI 1104858638 was issued on 07/07/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LAU 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 378 prescription claims written by this provider, covering 57 Medicare beneficiaries and totaling roughly $463K in drug spend, split 60% brand-name and 40% 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.

Hepatology Physician is a narrow specialty nationwide, with 281 enrolled providers across 36 states and an average of 803 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

110 FRANCIS ST
BOSTON, MA 02215

Provider Details

NPI 1104858638
Specialty Hepatology Physician
Credentials M.D.;MPH
Gender Female
NPI Issued 07/07/2006

Hospital and facility affiliations

Facilities where DARYL LAU, M.D.;MPH 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.

HARVARD MEDICAL FACULTY PHYS AT BETH ISRAEL DEACONESS MED CTR INC
BOSTON, MA

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 DARYL LAU, M.D.;MPH. Source: openpaymentsdata.cms.gov.

Total received

$13.4K

Largest payer

GlaxoSmithKline, LLC.

Most common payment type

Travel and Lodging

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.

License & disciplinary context — Massachusetts BORIM 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 — they are NOT specific to DARYL LAU, M.D.;MPH. To verify DARYL LAU, M.D.;MPH's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases

BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Brand-heavy

DARYL LAU, M.D.;MPH — brand share 60.0%
Specialty average (est.)

60% brand-name claims vs 40% generic, on 378 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.

378
Total Claims
$463K
Total Drug Cost
57
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
483
Total Day Supply
14,478
Brand vs Generic
60% brand / 40% generic
Brand Drug Cost
$397K
Generic Drug Cost
$67K

Patient Demographics

Average Patient Age
71.5 years
Avg HCC Risk Score
1.21
Gender Split
56% female / 44% male

Top Prescribed Drugs (Medicare Part D)

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

What DARYL LAU, M.D.;MPH 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
Vemlidy
Tenofovir Alafenamide
221
Entecavir
94
Omeprazole
17

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

Hepatology Physician Overview

How DARYL LAU, M.D.;MPH fits within the Hepatology Physician landscape nationally.

281
Hepatology Physician Providers in US
36
States with Hepatology Physician
803
Avg Claims per Provider

DARYL LAU, M.D.;MPH's 378 claims are below the specialty average of 803.

Nearby Hepatology Physician Providers in Massachusetts

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

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

Frequently Asked Questions

What is DARYL LAU, M.D.;MPH's specialty?
DARYL LAU, M.D.;MPH specializes in Hepatology Physician and practices in BOSTON, Massachusetts. Credentials: M.D.;MPH.
How much does DARYL LAU, M.D.;MPH prescribe under Medicare Part D?
In 2023, DARYL LAU, M.D.;MPH wrote 378 Medicare Part D claims totaling $463K in drug costs for 57 beneficiaries.
Where is DARYL LAU, M.D.;MPH located?
DARYL LAU, M.D.;MPH is located at 110 FRANCIS ST, BOSTON, MA, 02215. Phone: (617) 632-1098.
What is DARYL LAU, M.D.;MPH's NPI number?
DARYL LAU, M.D.;MPH's National Provider Identifier (NPI) is 1104858638, issued on 07/07/2006.
Does DARYL LAU, M.D.;MPH prescribe more brand-name or generic drugs?
DARYL LAU, M.D.;MPH's prescribing is 60% brand-name and 40% generic drugs by claim count, with $397K in brand drug costs.
How many Hepatology Physician providers are there in the US?
There are 281 Hepatology Physician providers across 36 states in the US. The average Hepatology Physician provider writes 803 Medicare Part D claims per year.
What drugs does DARYL LAU, M.D.;MPH prescribe most often?
Based on 2023 Medicare Part D data, DARYL LAU, M.D.;MPH's most frequently prescribed drugs include Vemlidy, Entecavir, Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does DARYL LAU, M.D.;MPH accept Medicare?
DARYL LAU, M.D.;MPH appears in CMS Medicare data with 378 Part D claims and 57 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify DARYL LAU, M.D.;MPH's credentials?
DARYL LAU, M.D.;MPH's NPI is 1104858638 with credentials M.D.;MPH. 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