2026 NPPES data Urology Physician NPI 1871597641 M.D.
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NICHOLAS STROUMBAKIS, M.D.

Urology Physician in GREENWICH, Connecticut. 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
3K
Medicare Part D claims · 802 beneficiaries · Urology Physician avg: 1K
MIPS score
73.5637/100
▼ 10 pts below national avg 83.1 · [object Object]
What the federal data reveals: NICHOLAS STROUMBAKIS, M.D. is a Urology Physician ([object Object]) practicing in GREENWICH, Connecticut with a Medicare Part D prescribing footprint of 3K claims across 802 beneficiaries . Their CMS MIPS Final Score of 73.5637/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: NICHOLAS STROUMBAKIS, M.D. reported a CMS MIPS final score of 73.5637 out of 100, below the 83.1 national average, and filed 3,332 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

NICHOLAS STROUMBAKIS, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

NICHOLAS STROUMBAKIS, M.D. at a glance

Below national average

NPI registry status

Active

Issued 06/09/2005

NPI 1871597641

Primary specialty

Urology Physician

Mid-sized

13,350 US NPIs in this specialty

Medicare Part D claims

3,332 160% vs specialty avg

2023 prescription claims

Specialty avg: 1,280

MIPS final score

73.5637/100 9.536299999999997% pts

Mid-tier band

vs 83.1 national avg

Specialty distribution in Connecticut

How Urology Physician compares to other specialties among Connecticut providers

Connecticut providers

Urology Physician share within Connecticut

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

Medicare quality performance — MIPS

NICHOLAS STROUMBAKIS, M.D.'s 2023 MIPS final score plotted against the Urology Physician national average

Below national average
MIPS Final Score
73.5637/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Urology Physician) — 73.5637/100 vs national avg 83.1

0%100%National avg83%73.6%
MIPS final score (Urology Physician) — 73.5637/100 vs national avg 83.1

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).

NICHOLAS STROUMBAKIS, M.D. is a Urology Physician provider practicing in GREENWICH, Connecticut, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1871597641. 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.

NICHOLAS STROUMBAKIS, M.D. appears in the CMS NPPES registry as a Urology Physician provider holding M.D. credentials at 49 LAKE AVE, GREENWICH, CT, 06830, with a listed phone of (203) 869-1285. NPI 1871597641 was issued on 06/09/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what STROUMBAKIS 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 3,332 prescription claims written by this provider, covering 802 Medicare beneficiaries and totaling roughly $500K in drug spend, with an opioid prescribing rate of 0.7%. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 73.5637/100 for the 2023 performance year (Quality 75.8435, Cost 51.4318), compared with the national average of 83.1.

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

49 LAKE AVE
GREENWICH, CT 06830

Provider Details

NPI 1871597641
Specialty Urology Physician
Credentials M.D.
Gender Male
NPI Issued 06/09/2005

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

73.5637
Final Score
Avg: 83.1
75.8435
Quality
51.4318
Cost
74
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where NICHOLAS STROUMBAKIS, M.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.

YALE UNIVERSITY
NEW HAVEN, CT

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

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

3,332
Total Claims
$500K
Total Drug Cost
802
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
8,186
Total Day Supply
238,032
Generic Drug Cost
$115K
Opioid Claims
22 (0.7% rate)
Antibiotic Claims
259

Patient Demographics

Average Patient Age
78.1 years
Avg HCC Risk Score
1.24
Gender Split
20% female / 80% male
Age Distribution
<65: 17, 65-74: 258, 75-84: 357, 85+: 170

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Tamsulosin Hcl
758
Finasteride
734
Myrbetriq
Mirabegron
245
Dutasteride
211
Potassium Citrate Er
Potassium Citrate
192
Alfuzosin Hcl Er
Alfuzosin Hcl
147
Levofloxacin
95
Silodosin
86
Oxybutynin Chloride Er
Oxybutynin Chloride
84
Estradiol
79

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

Urology Physician Overview

How NICHOLAS STROUMBAKIS, 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

NICHOLAS STROUMBAKIS, M.D.'s 3,332 claims are above the specialty average of 1,280.

Nearby Urology Physician Providers in Connecticut

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

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

Frequently Asked Questions

What is NICHOLAS STROUMBAKIS, M.D.'s specialty?
NICHOLAS STROUMBAKIS, M.D. specializes in Urology Physician and practices in GREENWICH, Connecticut. Credentials: M.D..
How much does NICHOLAS STROUMBAKIS, M.D. prescribe under Medicare Part D?
In 2023, NICHOLAS STROUMBAKIS, M.D. wrote 3,332 Medicare Part D claims totaling $500K in drug costs for 802 beneficiaries.
What is NICHOLAS STROUMBAKIS, M.D.'s Medicare quality score?
NICHOLAS STROUMBAKIS, M.D. has a CMS MIPS Final Score of 73.5637/100 (Quality: 75.8435, Cost: 51.4318). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is NICHOLAS STROUMBAKIS, M.D. located?
NICHOLAS STROUMBAKIS, M.D. is located at 49 LAKE AVE, GREENWICH, CT, 06830. Phone: (203) 869-1285.
What is NICHOLAS STROUMBAKIS, M.D.'s NPI number?
NICHOLAS STROUMBAKIS, M.D.'s National Provider Identifier (NPI) is 1871597641, issued on 06/09/2005.
Does NICHOLAS STROUMBAKIS, M.D. prescribe opioids?
Yes, NICHOLAS STROUMBAKIS, M.D. had 22 opioid claims in 2023 with an opioid prescribing rate of 0.7%.
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 NICHOLAS STROUMBAKIS, M.D. prescribe most often?
Based on 2023 Medicare Part D data, NICHOLAS STROUMBAKIS, M.D.'s most frequently prescribed drugs include Tamsulosin Hcl, Finasteride, Myrbetriq. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does NICHOLAS STROUMBAKIS, M.D. accept Medicare?
NICHOLAS STROUMBAKIS, M.D. appears in CMS Medicare data with 3,332 Part D claims and 802 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify NICHOLAS STROUMBAKIS, M.D.'s credentials?
NICHOLAS STROUMBAKIS, M.D.'s NPI is 1871597641 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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