GREGORY K. BULLER M.D.
NPI 1154321768
Internal Medicine - Nephrology in Middlebury, CT

Q: What is Gregory Buller's NPI number?

The NPI number for Gregory Buller is 1154321768. It was assigned to this individual provider in the NPPES registry on July 26, 2005.

Q: What is Gregory Buller's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Gregory Buller was last updated on September 3, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.

Active since July 26, 2005PECOS EnrolledAccepts Medicare Assignment

93.27/100

CMS Quality Rating

850 STRAITS TPKE, MIDDLEBURY, CT 06762(203) 758-1800(203) 758-1804 Get Directions Write a Review

NPPES record last updated: September 3, 2019. Verified against the NPPES registry weekly; last sync: August 16, 2026.

On this page

About Gregory K. Buller M.d. NPPES

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

GREGORY K. BULLER M.D. (NPI 1154321768) is an individual nephrology provider in Middlebury, Connecticut, licensed in Connecticut (027195) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS and is a graduate of Other (1980).

NPPES Registry Identity

NPI1154321768

Entity TypeIndividualMale

Primary Taxonomy207RN0300X

Provider Legal NameGREGORY K. BULLERCredential: M.D.

Location Address850 STRAITS TPKEMiddlebury, CT 06762-2843

Mailing Address267 Grant StreetBridgeport, CT 06610 · (203) 384-3470 · Fax (203) 384-4696

Phone(203) 758-1800

Fax(203) 758-1804

Sole ProprietorNo

Medical School CMSOtherGraduated 1980

Enumeration DateJuly 26, 2005

Last NPPES UpdateSeptember 3, 2019

✔ NPI 1154321768 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 CT · 027195

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.

850 STRAITS TPKE, Middlebury, CT 06762

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Other Identifiers 1

Medicaid001271957CT

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gregory K. Buller 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 ID4284736711

PECOS Enrollment IDI20080310000600

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06762 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

$138.84 typical visit price

range $60.82 – $183.10

Typical copayment $34.71 (range $15.20 – $45.77)

Most-billed visit code 99204

Established Patient

$106.68 typical visit price

range $19.76 – $149.26

Typical copayment $26.67 (range $4.94 – $37.31)

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.

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.

93.27/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

81.72

Promoting Interoperability

78.03

Improvement Activities

Other Providers at the Same Location NPPES 8

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

SINA RAISSI MD

Internal Medicine (Nephrology)

850 STRAITS TPKE
MIDDLEBURY, CT 06762

Naugatuck Valley Planning Region (203) 758-1800

DAVID A ROER MD

Internal Medicine (Nephrology)

850 STRAITS TPKE
MIDDLEBURY, CT 06762

Naugatuck Valley Planning Region (203) 758-1800

MIRA RHO MD

Internal Medicine (Nephrology)

850 STRAITS TPKE, SUITE 102
MIDDLEBURY, CT 06762

Naugatuck Valley Planning Region (203) 758-1800

MRS. GINA MARIE BURROWS APRN

Registered Nurse

850 STRAITS TPKE, SUITE 102
MIDDLEBURY, CT 06762

Naugatuck Valley Planning Region (203) 758-1800

MARILYN E OLSEN PA

Physician Assistant

850 STRAITS TPKE
MIDDLEBURY, CT 06762

Naugatuck Valley Planning Region (203) 758-1800

BEATRIZ R OLSON MD

Internal Medicine (Endocrinology, Diabetes & Metabolism)

850 STRAITS TPKE, STE 204
MIDDLEBURY, CT 06762

Naugatuck Valley Planning Region (203) 758-2594

DR. SETH ROBERT SEGALL PH.D.

Psychologist (Clinical)

850 STRAITS TPKE, STE 204
MIDDLEBURY, CT 06762

Naugatuck Valley Planning Region (203) 758-2867

NEPHROLOGY AND HYPERTENSION ASSOC PC

Internal Medicine (Nephrology)

850 STRAITS TPKE
MIDDLEBURY, CT 06762

Naugatuck Valley Planning Region (203) 758-1800

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 Gregory Buller's NPI number?

The NPI number for Gregory Buller is 1154321768. It was assigned to this individual provider in the NPPES registry on July 26, 2005.

Where is Gregory Buller located?

Gregory Buller practices at 850 Straits Tpke, Middlebury, CT 06762. The listed phone number is (203) 758-1800.

What is Gregory Buller's specialty?

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

Is Gregory Buller enrolled in Medicare?

Yes. Gregory Buller 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.

When was this NPI record last updated?

The NPPES record for Gregory Buller was last updated on September 3, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.