DR. SASHA BORIS GREK MD
NPI 1558438085
Anesthesiology in Lakeland, FL


Quality Rating: 75 out of 100 score

NPI Status: Active since November 29, 2006

Contact Information

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805
Phone: (863) 680-7000
Fax: (866) 264-8519

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  • Individual
  • Male
  • Years of Experience 22
  • Anesthesiology
  • Accepts Insurance
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About SASHA GREK

This page provides the complete NPI Profile along with additional information for Sasha Grek, an anesthesiologist established in Lakeland, Florida with a medical specialization in Anesthesiology and more than 22 years of experience. He graduated from University Of Florida College Of Medicine in 2004. The healthcare provider is registered in the NPI registry with number 1558438085 assigned on November 2006. The practitioner's primary taxonomy code is 207L00000X with license number ME103697 (FL). The provider is registered as an individual and his NPI record was last updated June 2025.

NPI
1558438085
Provider Name
DR. SASHA BORIS GREK MD
Gender
Male
Entity Type
Individual
Location Address
1600 LAKELAND HILLS BLVD LAKELAND, FL 33805
Location Phone
(863) 680-7000
Location Fax
(866) 264-8519
Mailing Address
2724 COCO PALM CIR WESLEY CHAPEL, FL 33543
Mailing Phone
(352) 519-8686
Medical School Name
UNIVERSITY OF FLORIDA COLLEGE OF MEDICINE
Graduation Year
2004
Is Sole Proprietor?
No
Enumeration Date
11-29-2006
Last Update Date
06-03-2025
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An anesthesiologist like Sasha Grek manages the care of surgical patients and pain relief through drug administration that reduces or eliminates pain during an operation, medical procedure or during labor and delivery of babies. During surgical procedures anesthesiologists are responsible for adjusting the amount of anesthetic, monitoring the patient's heart rate, body temperature, blood pressure and breathing.

Location Map

Secondary Locations

  • 1324 Lakeland Hills Blvd
    Lakeland, FL 33805
    (863) 687-1100

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Anesthesiology

Taxonomy Code
207L00000X
Type
Allopathic & Osteopathic Physicians
License No.
ME103697
License State
FL
Taxonomy Description
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1207L00000XAllopathic & Osteopathic Physicians

Anesthesiology

TRN7911 (FL)
2207LC0200XAllopathic & Osteopathic Physicians

Anesthesiology
Critical Care Medicine

ME103697 (FL)
3207RC0200XAllopathic & Osteopathic Physicians

Internal Medicine
Critical Care Medicine

ME103697 (FL)

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

  • Bronze Classic 4700 - EPO
  • Bronze Classic Standard - EPO
  • Bronze Elite + PCP Saver Plus - EPO
  • Gold Classic Standard - EPO
  • Gold Elite - EPO
  • Gold Elite Saver Plus - EPO
  • Secure - EPO
  • Silver Classic Standard - EPO
  • Silver Elite - EPO
  • Silver Simple Chronic Care CKM - EPO
  • Silver Simple Diabetes - EPO
  • Silver Simple PCP Saver - EPO

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Medicare Participation & PECOS Enrollment Status

Sasha Grek is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Sasha Grek is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 4183753346

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20100526000405

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Pacemaker insertion or repair

Pacemaker insertion or repair is a procedure to help regulate your heartbeat. A small device, called a pacemaker, is implanted under the skin near your heart. This device sends electrical signals to prompt your heart to beat at a normal rate. In a repair procedure, the pacemaker may be adjusted, replaced, or the wires connecting it to your heart may be fixed.

This service was performed for 1-10 patients

Overall MIPS Quality Performance

The provider participated in CMS Quality Payment Program under the Merit-based Incentive Payment System (MIPS) and has an overall final score of 75, based on four performance areas: quality, improvement activities, promoting interoperability, and cost. The purpose of this information is to help people with Medicare make informed decisions and incentivize doctors and clinicians to maximize performance.

The Merit-based Incentive Payment System (MIPS) is a way providers could use to participate in CMS Quality Payment Program (QPP). The MIPS program affects clinician reimbursement for Part B covered professional services and also rewards them for improving the quality of patient care and outcomes.

  • Final Score: 75 out of 100

    The MIPS program evaluates providers across multiple categories with a specific weight for each category resulting a in a MIPS final score that ranges from 0 to 100 points. The MIPS Final Score determines whether providers receive a negative, neutral or positive MIPS payment adjustment.

  • Quality Score: N/A

    The Quality category assesses providers performance on clinical practices and patient outcomes under the traditional MIPS program. The quality measures help identify the quality of healthcare processes, outcomes, and patient experiences. The Quality measure category compromises 40% providers final MPIS scores.

    There are six collection types for MIPS quality measures: Electronic Clinical Quality Measures (eCQMs), MIPS Clinical Quality Measures (CQMs), Qualified Clinical Data Registry (QCDR) Measures, Medicare Part B claims measures, CMS Web Interface measures and The Consumer Assessment of Healthcare Providers and Systems (CAHPS) for MIPS Survey.

  • Promoting Interoperability Score: N/A

    The Interoperability category measures the providers ability to use technology to exchange and make use of healthcare information in a way that is less burdensome and improves outcomes. The Interoperability measure category compromises 25% providers final MPIS scores.

    The MIPS Interoperability measure focuses on the use of certified electronic health record technology (CEHRT) to improve patient access health information, the exchange of information between clinicians and pharmacies and the systematic collection, analysis, and interpretation of healthcare data.

  • Improvement Activities Score: N/A

    The Improvement Activities performance category evaluates the providers participation in clinical activities that support the improvement of clinical practice, care delivery, and outcomes. Providers have the option to choose 2 to 4 activities from an inventory of over 100 improvement activities. Providers typically choose the activities that best fit their needs. The improvement activities measure category compromises 15% providers final MPIS scores.

    The Improvement measures aim to better patient engagement, patient safety and other areas of patient care. The Improvement Activities category compromises 15% of providers final MPIS scores.

  • Cost Score: N/A

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

  • Cost Score: N/A

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

Find Provider Hospital Affiliations - Privileges

Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.

Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Sasha Grek is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
LAKELAND REGIONAL MEDICAL CENTER1324 LAKELAND HILLS BLVD
LAKELAND, FL 33805
(863) 687-1100Acute Care Hospitals

Reviews for DR. SASHA BORIS GREK MD

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NPI Validation Check Digit Calculation


The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1558438085
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
251088316016
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 5 + 1 + 0 + 8 + 8 + 3 + 1 + 6 + 0 + 1 + 6 + 24 = 65
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
70 - 65 = 55

The NPI number 1558438085 is valid because the calculated check digit 5 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


The following 20 providers are registered at the same or nearby location.

MICHAEL A ADDONIZIO M.D.

Radiology

(Vascular & Interventional Radiology)

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

CLARK HARRIS GALBRAITH MD

Anesthesiology

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

ELISA ALVARADO-ZAYAS CRNA

Nurse Anesthetist, Certified Registered

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

FRANCES MARIE HARRIS MD

Anesthesiology

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

ANNA MARIA V ASUNCION MD

Internal Medicine

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

MICHAEL STANLEY ARBOUR CRNA

Nurse Anesthetist, Certified Registered

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

THELMA LOUISE CHISHOLM MD

Radiology

(Therapeutic Radiology)

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

EVAN CHAMBERS MD

Radiology

(Vascular & Interventional Radiology)

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

JOHN R BRADSHAW MD

Radiology

(Vascular & Interventional Radiology)

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

MARCELINA RIVERA AQUILO CRNA

Nurse Anesthetist, Certified Registered

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

JEFFREY WAYNE SHOOKS MD

Anesthesiology

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

LOUIS STEPHEN SACO MD

Internal Medicine

(Gastroenterology)

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

BETTY BERLY-MALDONADO CRNA

Nurse Anesthetist, Certified Registered

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

JOHN M LAFFERTY MD

Anesthesiology

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

JAMES ALLEN SMITH MD

Anesthesiology

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

RAYMOND MICHAEL VICTOR MD

Anesthesiology

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

MARIANN LOFFREDI MD

Anesthesiology

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

JOHN A BAZLEY MD

Internal Medicine

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

WILLIAM ROBERT BOSLEY MD

Otolaryngology

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

ALAN RICH MD

Ophthalmology

1600 LAKELAND HILLS BLVD
LAKELAND, FL
ZIP 33805

(863) 680-7000

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1558438085, enumerated in the NPI registry as an "individual" on November 29, 2006

The provider is located at 1600 Lakeland Hills Blvd Lakeland, Fl 33805 and the phone number is (863) 680-7000

The provider's speciality is Anesthesiology with taxonomy code 207L00000X

The provider has more than 22 years of experience. He graduated from University Of Florida College Of Medicine in 2004.

The provider might be accepting Accepts: Oscar Insurance Company of Florida. Please consult your insurance carrier or call the provider to make sure your health plan is currently accepted.

Yes, as of July 06, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

The most common procedures or services performed by this practitioner are: Pacemaker insertion or repair.

The practitioner is affiliated to the following hospital(s): LAKELAND REGIONAL MEDICAL CENTER. Hospital affiliations are identified through self-reporting data and service claims based on the place of service.

This NPI record was last updated on November 29, 2006. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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