DR. KOSTAS PAPAMARKAKIS M.D.
NPI 1699160234
Internal Medicine - Nephrology in Worcester, MA

Q: What is Kostas Papamarkakis's NPI number?

The NPI number for Kostas Papamarkakis is 1699160234. It was assigned to this individual provider in the NPPES registry on March 31, 2015.

Q: What is Kostas Papamarkakis's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Active since March 31, 2015PECOS EnrolledAccepts Medicare Assignment

123 SUMMER ST STE 685N, WORCESTER, MA 01608(508) 363-6008(508) 219-8081 Get Directions Write a Review

NPPES record last updated: May 27, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 27, 2026, Aug 3, 2020 (2 updates tracked since 2020).

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About Dr. Kostas Papamarkakis M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. KOSTAS PAPAMARKAKIS M.D. (NPI 1699160234) is an individual nephrology provider in Worcester, Massachusetts, licensed in Massachusetts (282248) and active in the NPI registry since March 2015. He is enrolled in Medicare PECOS, is affiliated with Umass Memorial Health - Harrington Hospital, and is a graduate of Tufts University School Of Medicine (2015).

NPPES Registry Identity

NPI1699160234

Entity TypeIndividualMale

Primary Taxonomy207RN0300X

Provider Legal NameDR. KOSTAS PAPAMARKAKISCredential: M.D.

Location Address123 SUMMER ST STE 685NWorcester, MA 01608-1216

Mailing Address123 Summer St Ste 685nWorcester, MA 01608-1216 · (508) 363-6008 · Fax (508) 219-8081

Phone(508) 363-6008

Fax(508) 219-8081

Sole ProprietorNo

Medical School CMSTufts University School Of MedicineGraduated 2015

Enumeration DateMarch 31, 2015

Last NPPES UpdateMay 27, 20262 updates tracked since enumeration

NPPES CertifiedMay 27, 2026

✔ NPI 1699160234 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians

Taxonomy Code207RN0300X

License✔ Licensed in MA · 282248

Definition

An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

123 SUMMER ST STE 685N, Worcester, MA 01608

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Kostas Papamarkakis M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4587977194

PECOS Enrollment IDI20201028001678, I20231227001726

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Kostas Papamarkakis reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Central Mass Nephrology

Same address

Nephrology

123 SUMMER ST STE 685
Worcester, MA 01608

Reassigned Medicare billing, Connecticut and Massachusetts enrollments
5 clinicians in this Medicare group

NPI 1588331250 (508) 363-6008

Prospect Ct Medical Foundation, Inc.

50 mi

Family Medicine

71 HAYNES ST, MILLER BLDG., FLOOR G
Manchester, CT 06040

Reassigned Medicare billing, Connecticut enrollment
422 clinicians in this Medicare group

NPI 1144677568 (860) 533-2981

Hartford Healthcare Medical Group Specialists, PLLC

58 mi

Surgery

85 SEYMOUR ST STE 415
Hartford, CT 06106

Reassigned Medicare billing, Connecticut enrollment
1,921 clinicians in this Medicare group

NPI 1023584216 (860) 246-2071

Starling Physicians, PLLC

59 mi

Internal Medicine

1210 SILAS DEANE HWY
Wethersfield, CT 06109

Reassigned Medicare billing, Connecticut enrollment
468 clinicians in this Medicare group

NPI 1306779905 (860) 832-4666

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 14

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

867 services309 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

419 services152 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

279 services244 patients

Dialysis services, 4 or more physician visits per month (20 years or older) 90960

Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.

143 services29 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

113 services44 patients

Hemodialysis procedure with physician evaluation 90935

Hemodialysis is a treatment that uses a machine to filter waste and excess fluid from your blood when your kidneys can't. A physician checks your health before, during, and after the procedure to ensure it's working effectively for you.

76 services65 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

52 services41 patients

Dialysis procedure including 1 evaluation 90945

Dialysis is a treatment that filters and purifies the blood when your kidneys can't do their job. The procedure involves circulating your blood through a machine that removes waste products. An evaluation is done beforehand to assess your health and determine the best approach for your treatment.

39 services33 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

36 services36 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

25 services16 patients

Dialysis services, 1 physician visit per month (20 years or older) 90962

Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys canâ€™t do their job. A physician visit once a month ensures your treatment is working effectively and adjusts it if necessary. This service is available for individuals aged 20 years and older.

14 services11 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

11 services11 patients

Urine microalbumin (protein) level 82043

The urine microalbumin level test measures the amount of a protein called albumin in your urine. This test helps to detect early signs of kidney damage. High levels of albumin may suggest your kidneys aren't functioning properly. It's a simple, non-invasive test that involves providing a urine sample.

11 services11 patients

Dialysis services, 2-3 physician visits per month (20 years or older) 90961

Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Umass Memorial Health - Harrington Hospital

Acute Care Hospitals · Southbridge, MA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220019

Location100 South StreetSouthbridge, MA 01550 · Worcester County

Emergency services

St Vincent Hospital

Acute Care Hospitals · Worcester, MA

2/5 CMS rating

OwnershipProprietary

CMS Certification Number220176

Location123 Summer StreetWorcester, MA 01608 · Worcester County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01608 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$134.47 typical visit price

range $58.86 – $177.36

Typical copayment $33.61 (range $14.71 – $44.34)

Most-billed visit code 99204

Established Patient

$103.48 typical visit price

range $19.11 – $144.84

Typical copayment $25.87 (range $4.77 – $36.21)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DEETU KADAMBI SIMH M.D.

Internal Medicine (Nephrology)

123 SUMMER ST STE 685N
WORCESTER, MA 01608

Worcester County (508) 363-6008

DR. ASHISH VERMA MD, MRCP

Internal Medicine (Nephrology)

123 SUMMER ST STE 685N
WORCESTER, MA 01608

Worcester County (508) 363-6008

DR. DEEP S PHACHU M.D.

Internal Medicine (Nephrology)

123 SUMMER ST STE 685N
WORCESTER, MA 01608

Worcester County (508) 363-6008

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Kostas Papamarkakis's NPI number?

The NPI number for Kostas Papamarkakis is 1699160234. It was assigned to this individual provider in the NPPES registry on March 31, 2015.

Where is Kostas Papamarkakis located?

Kostas Papamarkakis practices at 123 Summer St Ste 685N, Worcester, MA 01608. The listed phone number is (508) 363-6008.

What is Kostas Papamarkakis's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Kostas Papamarkakis enrolled in Medicare?

Yes. Kostas Papamarkakis is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Kostas Papamarkakis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kostas Papamarkakis reassigns Medicare benefits to 4 organizations: Central Mass Nephrology (Worcester, MA), Prospect Ct Medical Foundation, Inc. (Manchester, CT), Hartford Healthcare Medical Group Specialists, PLLC (Hartford, CT) and Starling Physicians, PLLC (Wethersfield, CT). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Kostas Papamarkakis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Kostas Papamarkakis accept?

Health plans from Anthem Blue Cross and Blue Shield list Kostas Papamarkakis as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Kostas Papamarkakis affiliated with any hospitals?

According to CMS data, Kostas Papamarkakis is affiliated with Umass Memorial Health - Harrington Hospital and St Vincent Hospital.

When was this NPI record last updated?

The NPPES record for Kostas Papamarkakis was last updated on May 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.