2026 NPPES data Urology Physician NPI 1578524674 M.D.
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STEPHEN LAZAROU, M.D.

Urology Physician in WELLESLEY, 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
130
Medicare Part D claims · 51 beneficiaries · Urology Physician avg: 1K
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$187.69
3 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: STEPHEN LAZAROU, M.D. is a Urology Physician ([object Object]) practicing in WELLESLEY, Massachusetts with a Medicare Part D prescribing footprint of 130 claims across 51 beneficiaries — 11% brand-name prescribing . Industry payments of $187.69 across 3 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: STEPHEN LAZAROU, M.D. filed 130 Medicare Part D claims in 2023 across WELLESLEY, Massachusetts. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

STEPHEN LAZAROU, 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).

STEPHEN LAZAROU, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 03/29/2006

NPI 1578524674

Primary specialty

Urology Physician

Mid-sized

13,350 US NPIs in this specialty

Medicare Part D claims

130 90% vs specialty avg

2023 prescription claims

Specialty avg: 1,280

Specialty distribution in Massachusetts

How Urology Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Urology Physician share within Massachusetts

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

Specialty board-certification context

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

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

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

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

STEPHEN LAZAROU, M.D. is a Urology Physician provider practicing in WELLESLEY, Massachusetts, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1578524674. 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.

STEPHEN LAZAROU, M.D. appears in the CMS NPPES registry as a Urology Physician provider holding M.D. credentials at 65 WALNUT ST, WELLESLEY, MA, 02481, with a listed phone of (781) 237-9000. NPI 1578524674 was issued on 03/29/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LAZAROU 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 130 prescription claims written by this provider, covering 51 Medicare beneficiaries and totaling roughly $14K in drug spend, split 11% brand-name and 89% 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.

Urology Physician is a mid-sized specialty nationwide, with 13,350 enrolled providers across 54 states and an average of 1,280 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

65 WALNUT ST
WELLESLEY, MA 02481

Provider Details

NPI 1578524674
Specialty Urology Physician
Credentials M.D.
Gender Male
NPI Issued 03/29/2006

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 STEPHEN LAZAROU, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$188

Largest payer

EMD Serono, Inc.

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.

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 STEPHEN LAZAROU, M.D.. To verify STEPHEN LAZAROU, M.D.'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 · Typical

STEPHEN LAZAROU, M.D. — brand share 11.0%
Specialty average (est.)

11% brand-name claims vs 89% generic, on 130 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.

130
Total Claims
$14K
Total Drug Cost
51
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
284
Total Day Supply
7,968
Brand vs Generic
11% brand / 89% generic
Brand Drug Cost
$10K
Generic Drug Cost
$4K
Antibiotic Claims
17

Patient Demographics

Average Patient Age
74.4 years
Avg HCC Risk Score
0.88
Gender Split
0% female / 100% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Finasteride
51
Tamsulosin Hcl
19

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

Urology Physician Overview

How STEPHEN LAZAROU, M.D. fits within the Urology Physician landscape nationally.

13,350
Urology Physician Providers in US
54
States with Urology Physician
1,280
Avg Claims per Provider

STEPHEN LAZAROU, M.D.'s 130 claims are below the specialty average of 1,280.

Nearby Urology Physician Providers in Massachusetts

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

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

Frequently Asked Questions

What is STEPHEN LAZAROU, M.D.'s specialty?
STEPHEN LAZAROU, M.D. specializes in Urology Physician and practices in WELLESLEY, Massachusetts. Credentials: M.D..
How much does STEPHEN LAZAROU, M.D. prescribe under Medicare Part D?
In 2023, STEPHEN LAZAROU, M.D. wrote 130 Medicare Part D claims totaling $14K in drug costs for 51 beneficiaries.
Where is STEPHEN LAZAROU, M.D. located?
STEPHEN LAZAROU, M.D. is located at 65 WALNUT ST, WELLESLEY, MA, 02481. Phone: (781) 237-9000.
What is STEPHEN LAZAROU, M.D.'s NPI number?
STEPHEN LAZAROU, M.D.'s National Provider Identifier (NPI) is 1578524674, issued on 03/29/2006.
Does STEPHEN LAZAROU, M.D. prescribe more brand-name or generic drugs?
STEPHEN LAZAROU, M.D.'s prescribing is 11% brand-name and 89% generic drugs by claim count, with $10K in brand drug costs.
How many Urology Physician providers are there in the US?
There are 13,350 Urology Physician providers across 54 states in the US. The average Urology Physician provider writes 1,280 Medicare Part D claims per year.
What drugs does STEPHEN LAZAROU, M.D. prescribe most often?
Based on 2023 Medicare Part D data, STEPHEN LAZAROU, M.D.'s most frequently prescribed drugs include Finasteride, Tamsulosin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does STEPHEN LAZAROU, M.D. accept Medicare?
STEPHEN LAZAROU, M.D. appears in CMS Medicare data with 130 Part D claims and 51 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify STEPHEN LAZAROU, M.D.'s credentials?
STEPHEN LAZAROU, M.D.'s NPI is 1578524674 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