NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1699160234 M.D.
Verify on CMS → Kostas Papamarkakis, M.D.
Nephrology Physician in Springfield, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,569 in Nephrology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
2K
Medicare Part D claims · 409 beneficiaries · Nephrology Physician avg: 1K
Industry payments
$248.06
2 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Kostas Papamarkakis, M.D. filed 2,244 Medicare Part D claims in 2023 as a Nephrology Physician in Springfield, Massachusetts.
- 2K
- Part D claims, 2023
- 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.
Kostas Papamarkakis, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,244 Top 15% higher than 85% of 1,370,886 prescribers
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)
Kostas Papamarkakis, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Kostas Papamarkakis, M.D.?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
2,244 54% vs specialty avg
Specialty distribution in Massachusetts
How Nephrology Physician compares to other specialties among Massachusetts providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Nephrology Physician. Verify directly:
How MIPS and board certification work
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).
Kostas Papamarkakis, M.D. appears in the CMS NPPES registry as a Nephrology Physician provider holding M.D. credentials at 759 CHESTNUT ST, Springfield, MA, 01199, with a listed phone of (413) 794-0000. NPI 1699160234 was issued on 03/31/2015.
Medicare Part D records for calendar year 2023 show 2,244 prescription claims written by this provider, covering 409 Medicare beneficiaries and totaling roughly $450K in drug spend, with an opioid prescribing rate of 0.5%.
Nephrology Physician is a mid-sized specialty nationwide, with 10,569 enrolled providers across 55 states and an average of 1,454 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
Provider Details
| NPI | 1699160234 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 03/31/2015 |
Hospital and facility affiliations
Facilities where Kostas Papamarkakis, 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.
Prospect CT Medical Foundation Inc
Tolland, CT
Starling Physicians, PLLC
Avon, 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).
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 Kostas Papamarkakis, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$248
Largest payer
Medtronic, Inc.
Most common payment type
Education
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 Kostas Papamarkakis, M.D.. To verify Kostas Papamarkakis, 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
2,244
Total Claims
$450K
Total Drug Cost
409
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,454
- Total Day Supply
- 131,495
- Generic Drug Cost
- $65K
- Opioid Claims
- 12 (0.5% rate)
- Antibiotic Claims
- 25
Patient Demographics
- Average Patient Age
- 71.7 years
- Avg HCC Risk Score
- 2.94
- Gender Split
- 51% female / 49% male
- Age Distribution
- <65: 82, 65-74: 151, 75-84: 133, 85+: 43
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Kostas Papamarkakis, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amlodipine Besylate
Amlodipine Besylate
225 claims
- Farxiga
Farxiga
148 claims
- Losartan Potassium
Losartan Potassium
121 claims
- Carvedilol
Carvedilol
115 claims
- Torsemide
Torsemide
101 claims
- Furosemide 89
Furosemide
89 claims
- Lisinopril 86
Lisinopril
86 claims
- Jardiance 83
Jardiance
83 claims
| Drug | Claims |
|---|---|
| Amlodipine Besylate | 225 |
| Farxiga Dapagliflozin Propanediol | 148 |
| Losartan Potassium | 121 |
| Carvedilol | 115 |
| Torsemide | 101 |
| Furosemide | 89 |
| Lisinopril | 86 |
| Jardiance Empagliflozin | 83 |
| Tamsulosin Hcl | 79 |
| Nifedipine Er Nifedipine | 73 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Kostas Papamarkakis, M.D. fits within the Nephrology Physician landscape nationally.
10,569
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider
Kostas Papamarkakis, M.D.'s 2,244 claims are above the specialty average of 1,454.
Nearby Nephrology Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Papamarkakis.
Dr. Amtul Aala
MD
Boston, MA
Dr. Reza Abdi
MD
Boston, MA
Vivian Abernethy
Boston, MA
Dr. Rekha Abichandani
M.D.
Cambridge, MA
Dr. Konstantin Abramov
M.D.
Worcester, MA
Compare Nephrology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Massachusetts medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Nephrology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Kostas Papamarkakis, M.D.'s specialty? ▼
Kostas Papamarkakis, M.D. specializes in Nephrology Physician and practices in Springfield, Massachusetts. Credentials: M.D..
How much does Kostas Papamarkakis, M.D. prescribe under Medicare Part D? ▼
In 2023, Kostas Papamarkakis, M.D. wrote 2,244 Medicare Part D claims totaling $450K in drug costs for 409 beneficiaries.
Where is Kostas Papamarkakis, M.D. located? ▼
Kostas Papamarkakis, M.D. is located at 759 CHESTNUT ST, Springfield, MA, 01199. Phone: (413) 794-0000.
What is Kostas Papamarkakis, M.D.'s NPI number? ▼
Kostas Papamarkakis, M.D.'s National Provider Identifier (NPI) is 1699160234, issued on 03/31/2015.
Does Kostas Papamarkakis, M.D. prescribe opioids? ▼
Yes, Kostas Papamarkakis, M.D. had 12 opioid claims in 2023 with an opioid prescribing rate of 0.5%.
How many Nephrology Physician providers are there in the US? ▼
There are 10,569 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does Kostas Papamarkakis, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Kostas Papamarkakis, M.D.'s most frequently prescribed drugs include Amlodipine Besylate, Farxiga, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Kostas Papamarkakis, M.D. accept Medicare? ▼
Kostas Papamarkakis, M.D. appears in CMS Medicare data with 2,244 Part D claims and 409 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Kostas Papamarkakis, M.D.'s credentials? ▼
Kostas Papamarkakis, M.D.'s NPI is 1699160234 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
View source datasets and methodology notes
- 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
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.