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

Active since November 29, 2006PECOS Enrolled
80.11/100
CMS Quality Rating
1600 LAKELAND HILLS BLVD, LAKELAND, FL 33805(863) 680-7000(866) 264-8519 Get Directions Write a Review

NPPES record last updated: June 3, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 3, 2025, Jan 6, 2025, Feb 23, 2023 and 3 more (6 updates tracked since 2017).

About Dr. Sasha Boris Grek Md NPPES

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

DR. SASHA BORIS GREK MD (NPI 1558438085) is an individual anesthesiology provider in Lakeland, Florida, licensed in Florida (ME103697) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Lakeland.

NPPES Registry Identity

NPI1558438085
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. SASHA BORIS GREKCredential: MD
Location Address1600 LAKELAND HILLS BLVDLakeland, FL 33805-3019
Mailing Address2724 Coco Palm CirWesley Chapel, FL 33543-4003 · (352) 519-8686
Phone(863) 680-7000
Fax(866) 264-8519
Sole ProprietorNo
Enumeration DateNovember 29, 2006
Last NPPES UpdateJune 3, 20256 updates tracked since enumeration
NPPES CertifiedJune 3, 2025
✔ NPI 1558438085 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Licenses✔ Licensed in FL · ME103697✔ Licensed in FL · TRN7911
Definition
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.
Also ListedAnesthesiology · Critical Care MedicineTaxonomy 207LC0200X · License ME103697 (FL)
Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License ME103697 (FL)
1600 LAKELAND HILLS BLVD, Lakeland, FL 33805
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Secondary Practice Location 1

Location 11324 Lakeland Hills BlvdLakeland, FL 33805-4543 · Phone (863) 687-1100

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health Maintenance Organization of Florida.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Sasha Boris Grek Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

7

Medicare enrollment records show Sasha Grek reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Lakeland Regional Health Systems, Inc.
0.4 mi
Multi-Specialty
1324 LAKELAND HILLS BLVD, FINANCE DEPARTMENT
Lakeland, FL 33805
  • Reassigned Medicare billing, Florida enrollment
  • 740 clinicians in this Medicare group
NPI 1497748743 (863) 687-7251
Greater Florida Anesthesiologists, LLC
22 mi
Anesthesiology
119 OAKFIELD DR
Brandon, FL 33511
  • Reassigned Medicare billing, Florida enrollment
  • 749 clinicians in this Medicare group
NPI 1831761014 (954) 939-5000
Sound Physicians Of Florida IV, LLC
29 mi
Internal Medicine
3100 E FLETCHER AVE
Tampa, FL 33613
  • Reassigned Medicare billing, Florida enrollment
  • 300 clinicians in this Medicare group
NPI 1235712415 (813) 971-6000
Cogent Healthcare Of Jacksonville, LLC
44 mi
Internal Medicine
10501 ROOSEVELT BLVD N
St Petersburg, FL 33716
  • Reassigned Medicare billing, Florida enrollment
  • 440 clinicians in this Medicare group
NPI 1386215275 (727) 577-3800
Villages Regional Hospital Physician Services LLC
51 mi
Surgery
600 E DIXIE AVE
Leesburg, FL 34748
  • Reassigned Medicare billing, Florida enrollment
  • 354 clinicians in this Medicare group
NPI 1700669926 (352) 323-5001
Apollo Medical Group Of Ocala LLC
76 mi
Anesthesiology
3241 SW 34TH ST
Ocala, FL 34474
  • Reassigned Medicare billing, Florida enrollment
  • 77 clinicians in this Medicare group
NPI 1477326908 (352) 237-5906
Select Specialty Hospital Gainesville LLC
111 mi
Hospitalist
1600 SW ARCHER RD FL 5
Gainesville, FL 32610
  • Reassigned Medicare billing, Florida enrollment
  • 13 clinicians in this Medicare group
NPI 1396055604 (717) 972-1100

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

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.

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.
27 services14 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

80.11/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality63.29
Promoting Interoperability97
Improvement Activities40
Cost64.85

Other Providers at the Same Location NPPES 20

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

DAWN M PALASZEWSKI M.D.
Obstetrics & Gynecology
1600 LAKELAND HILLS BLVD
LAKELAND, FL 33805
Polk County (863) 680-7000
DR. JULIA MCNEICE DO
Internal Medicine
1600 LAKELAND HILLS BLVD
LAKELAND, FL 33805
Polk County (863) 680-7190
CHEZA MARIE WILKINSON APRN
Nurse Practitioner
1600 LAKELAND HILLS BLVD
LAKELAND, FL 33805
Polk County (863) 680-7490
FRANCES MARIE HARRIS MD
Anesthesiology
1600 LAKELAND HILLS BLVD
LAKELAND, FL 33805
Polk County (863) 680-7000
ROBERT H BEVIS MD
Internal Medicine
1600 LAKELAND HILLS BLVD
LAKELAND, FL 33805
Polk County (863) 680-7190
DANTON MANABAT SUN MD
Family Medicine
1600 LAKELAND HILLS BLVD
LAKELAND, FL 33805
Polk County (863) 680-7190
DR. LILLIAM S. CHIQUES-COLON MD
Internal Medicine
1600 LAKELAND HILLS BLVD
LAKELAND, FL 33805
Polk County (863) 680-7190
ANNA M DE LA TORRE CRNA
Nurse Anesthetist, Certified Registered
1600 LAKELAND HILLS BLVD
LAKELAND, FL 33805
Polk County (863) 680-7000

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 Sasha Grek's NPI number?

The NPI number for Sasha Grek is 1558438085. It was assigned to this individual provider in the NPPES registry on November 29, 2006.

Where is Sasha Grek located?

Sasha Grek practices at 1600 Lakeland Hills Blvd, Lakeland, FL 33805. The listed phone number is (863) 680-7000.

What is Sasha Grek's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Sasha Grek enrolled in Medicare?

Yes. Sasha Grek is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Sasha Grek's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sasha Grek reassigns Medicare benefits to 7 organizations: Lakeland Regional Health Systems, Inc. (Lakeland, FL), Greater Florida Anesthesiologists, LLC (Brandon, FL), Sound Physicians Of Florida IV, LLC (Tampa, FL), Cogent Healthcare Of Jacksonville, LLC (St Petersburg, FL), Villages Regional Hospital Physician Services LLC (Leesburg, FL) and 2 more organizations, listed in the Medicare section above. 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 Sasha Grek's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sasha Grek accept?

Health plans from Oscar Health Maintenance Organization of Florida list Sasha Grek 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.

When was this NPI record last updated?

The NPPES record for Sasha Grek was last updated on June 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.