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KAY NEGISHI
NPI 1194103309
Internal Medicine in Park City, UT

Active since May 08, 2015PECOS EnrolledAccepts Medicare Assignment
1743 SIDEWINDER DRIVE, UNIT 114, PARK CITY, UT 84060(307) 840-9834(833) 450-0933 Get Directions Write a Review

NPPES record last updated: December 30, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 30, 2025, Feb 26, 2025, Oct 3, 2024 and 1 more (4 updates tracked since 2018).

About Kay Negishi NPPES

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

KAY NEGISHI (NPI 1194103309) is an individual internal medicine provider in Park City, Utah, licensed in Massachusetts (273937) and active in the NPI registry since May 2015. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1194103309
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameKAY NEGISHI
Location Address1743 SIDEWINDER DRIVE, UNIT 114Park City, UT 84060
Mailing Address55 Fruit StBoston, MA 02114-2621 · (617) 726-2000
Phone(307) 840-9834
Fax(833) 450-0933
Sole ProprietorNo
Medical School CMSPennsylvania State University College Of MedicineGraduated 2015
Enumeration DateMay 8, 2015
Last NPPES UpdateDecember 30, 20254 updates tracked since enumeration
NPPES CertifiedDecember 30, 2025
✔ NPI 1194103309 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MA · 273937
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedHospitalistTaxonomy 208M00000X · License 273937 (MA)
1743 SIDEWINDER DRIVE, Park City, UT 84060
Open in Google Maps ↗

Secondary Practice Locations 3

Location 11153 Centre StJamaica Plain, MA 02130-3446 · Phone (617) 983-7000
Location 275 Francis StBoston, MA 02115-6110 · Phone (617) 732-5500
Location 355 Fruit StBoston, MA 02114-2621 · Phone (617) 726-2000

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, BridgeSpan Health Company, Regence BlueCross BlueShield of Utah and more.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

Kay Negishi 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 ID4789987454
PECOS Enrollment IDI20180518000489
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 Kay Negishi reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Emerald Medical Practice PC
Same address
Specialist
1743 SIDEWINDER DR UNIT 114
Park City, UT 84060
  • Reassigned Medicare billing, Colorado and Utah enrollments
  • 17 clinicians in this Medicare group
NPI 1447011267 (307) 840-9834
Dhhs, Phs, Naihs, Shiprock Hospital
288 mi
General Acute Care Hospital
US HWY 160 & NAVAJO ROUTE 35 - RED MESA
Teecnospos, AZ 86514
  • Reassigned Medicare billing, Texas enrollment
  • 572 clinicians in this Medicare group
NPI 1477615789 (505) 368-6401
Rosebud Indian Health Service
576 mi
General Acute Care Hospital
400 SOLDIER CREEK ROAD
Rosebud, SD 57570
  • Reassigned Medicare billing, Texas enrollment
  • 386 clinicians in this Medicare group
NPI 1194757369 (605) 747-3245
Cambridge Public Health Commission
2,079 mi
General Acute Care Hospital
1493 CAMBRIDGE ST
Cambridge, MA 02139
  • Reassigned Medicare billing, Massachusetts enrollment
  • 719 clinicians in this Medicare group
NPI 1487603585 (617) 665-1000
Brigham & Womens Physicians Organization Inc
2,079 mi
Internal Medicine
75 FRANCIS ST
Boston, MA 02115
  • Reassigned Medicare billing, Massachusetts enrollment
  • 4,574 clinicians in this Medicare group
NPI 1033535497 (617) 732-5500
Massachusetts General Physicians Organization Inc
2,081 mi
Dermatology
55 FRUIT ST, BUL 2
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,360 clinicians in this Medicare group
NPI 1801874573 (617) 724-0287
The General Hospital Corporation
2,081 mi
General Acute Care Hospital
55 FRUIT ST, BULFINCH 360
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,234 clinicians in this Medicare group
NPI 1023049236 (617) 726-2000

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 6

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.

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.
82 services70 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.
43 services36 patients
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.
35 services22 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
20 services20 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.
13 services13 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.
11 services11 patients

Hospital Affiliations CMS Care Compare

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

Massachusetts General Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220071
Location55 Fruit StreetBoston, MA 02114 · Suffolk County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 84060 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
$125.70 typical visit price
range $54.34 – $166.03
Typical copayment $31.42 (range $13.58 – $41.50)
Most-billed visit code 99204
Established Patient
$96.35 typical visit price
range $17.23 – $135.20
Typical copayment $24.08 (range $4.30 – $33.80)
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 2

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

BABBLMR, INC.
In Home Supportive Care
1743 SIDEWINDER DRIVE, 1ST FLOOR
PARK CITY, UT 84060
Summit County (844) 674-7774
CARE PLANNING INSTITUTE, INC
In Home Supportive Care
1743 SIDEWINDER DRIVE
PARK CITY, UT 84060
Summit County (877) 467-8166

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 Kay Negishi's NPI number?

The NPI number for Kay Negishi is 1194103309. It was assigned to this individual provider in the NPPES registry on May 8, 2015.

Where is Kay Negishi located?

Kay Negishi practices at 1743 Sidewinder Drive Unit 114, Park City, UT 84060. The listed phone number is (307) 840-9834.

What is Kay Negishi's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Kay Negishi enrolled in Medicare?

Yes. Kay Negishi 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 Kay Negishi's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kay Negishi reassigns Medicare benefits to 7 organizations: Emerald Medical Practice PC (Park City, UT), Dhhs, Phs, Naihs, Shiprock Hospital (Teecnospos, AZ), Rosebud Indian Health Service (Rosebud, SD), Cambridge Public Health Commission (Cambridge, MA), Brigham & Womens Physicians Organization Inc (Boston, MA) 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 Kay Negishi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Kay Negishi accept?

Health plans from Blue Cross and Blue Shield of Texas, BridgeSpan Health Company, Regence BlueCross BlueShield of Utah and Taro Health list Kay Negishi 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 Kay Negishi affiliated with any hospitals?

According to CMS data, Kay Negishi is affiliated with Massachusetts General Hospital.

When was this NPI record last updated?

The NPPES record for Kay Negishi was last updated on December 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.