John Granquist, M.D.
NPI 1699821892 · Cardiovascular Disease Physician · Hartford, CT
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Granquist, M.D. is a Cardiovascular Disease Physician provider in Hartford, CT (NPI 1699821892).
Provider details
- NPI number
- 1699821892
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 045097 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
7,810 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 4,511 | $8 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 771 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 596 | $138 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 492 | $213 |
| Heart Muscle Strain Imaging93356 | 360 | $41 |
| Evaluation of Single, Dual, Multiple Lead Or Leadless Pacemaker System Or Implantable Defibrillator System, Remote Up to 90 Days |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 53 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 1,007 | 279 |
| Apixabanbrand: Eliquis | 880 | 228 |
| Atorvastatin Calcium | 530 | 135 |
| Amlodipine Besylate | 414 | 121 |
| Losartan Potassium | 340 | 102 |
| Metoprolol Tartrate | 336 | 107 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-28
- Last updated
- 2017-04-25
Frequently asked questions
- What is John Granquist's NPI number?
- John Granquist's National Provider Identifier (NPI) is 1699821892, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Granquist's specialty?
- John Granquist is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is John Granquist located?
- John Granquist's practice location on file with NPPES is Consulting Cardiologists, P.C., Hartford, CT 06106.
- What is John Granquist's phone number?
- The practice phone number listed in the NPPES registry for John Granquist is (860) 522-1761.
- Does John Granquist accept Medicare?
- John Granquist is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Granquist's NPI active?
- Yes — John Granquist's NPI (1699821892) is active in the NPPES registry as of the last update on 2017-04-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.