DR. JOHN GRANQUIST M.D.
NPI 1699821892
Internal Medicine - Cardiovascular Disease in Hartford, CT
About Dr. John Granquist M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN GRANQUIST M.D. (NPI 1699821892) is an individual cardiovascular disease provider in Hartford, Connecticut, licensed in Connecticut (045097) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of Tufts University School Of Medicine (2000).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted 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. John Granquist 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.
Medicare Billing Reassignments
4Medicare enrollment records show John Granquist reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hartford, CT 06106
- Reassigned Medicare billing, Connecticut enrollment
- Medicare enrollment name: Consulting Cardiologists PC
- 21 clinicians in this Medicare group
Hartford, CT 06102
- Reassigned Medicare billing, Connecticut enrollment
- 1,333 clinicians in this Medicare group
Windsor, CT 06095
- Reassigned Medicare billing, Connecticut enrollment
- 34 clinicians in this Medicare group
Meriden, CT 06451
- Reassigned Medicare billing, Connecticut enrollment
- 505 clinicians in this Medicare group
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 24
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06106 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 John Granquist's NPI number?
The NPI number for John Granquist is 1699821892. It was assigned to this individual provider in the NPPES registry on January 28, 2007.
Where is John Granquist located?
John Granquist practices at Consulting Cardiologists, P.C. 85 Seymour Street Suite 719, Hartford, CT 06106. The listed phone number is (860) 522-1761.
What is John Granquist's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is John Granquist enrolled in Medicare?
Yes. John Granquist 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 John Granquist's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Granquist reassigns Medicare benefits to 4 organizations: Consulting Cardiologists, P.C. (Hartford, CT), Hartford Hospital (Hartford, CT), Connecticut Heart Physicians, Inc. (Windsor, CT) and Midstate Medical Center (Meriden, 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 John Granquist's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Granquist accept?
Health plans from Anthem Blue Cross and Blue Shield list John Granquist 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 John Granquist was last updated on April 25, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Dr. John Granquist, M.D. · NPI 1699821892
Cardiovascular Disease physician in Hartford, Connecticut. Individual provider, active in the CMS NPPES registry since January 28, 2007.
## Identity
- **NPI:** 1699821892 (Entity type: Individual)
- **Enumerated:** January 28, 2007
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** 045097 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** CONSULTING CARDIOLOGISTS, P.C., 85 SEYMOUR STREET SUITE 719, Hartford, CT 06106
- **Phone:** (860) 522-1761
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Consulting Cardiologists, P.C. (NPI 1053353656, Hartford, CT); Hartford Hospital (NPI 1770696643, Hartford, CT); Connecticut Heart Physicians, Inc. (NPI 1477588002, Windsor, CT); Midstate Medical Center (NPI 1154425288, Meriden, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Tufts University School Of Medicine, class of 2000
## Record status
- **NPPES last updated:** April 25, 2017
- **Other identifiers:** Medicare PIN 060001810 (CT)
---
Source: [NPI Profile](https://npiprofile.com/npi/1699821892) · Data from the CMS NPPES public registry.