Robert Grillo, M.D.
NPI 1770565566 · Psychiatry Physician · Groton, CT
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Grillo, M.D. is a Psychiatry Physician provider in Groton, CT (NPI 1770565566).
Provider details
- NPI number
- 1770565566
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 26488 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
191 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 178 | $99 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 13 | $173 |
Typical Medicare-allowed amounts for these services range $99–$173 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 45 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 187 | 25 |
| Gabapentin | 173 | 30 |
| Quetiapine Fumarate | 124 | 22 |
| Bupropion Hclbrand: Bupropion Xl | 88 | 18 |
| Escitalopram Oxalate | 76 | 16 |
| Aripiprazole | 74 | — |
| Buspirone Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$260 across 10 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 326 Washington StNorwich, CT 06360-2740Phone: (860) 889-8331
- 112 Mansfield AveWillimantic, CT 06226-2045Phone: (860) 456-9116
Registry dates
- Enumerated
- 2005-11-17
- Last updated
- 2023-06-20
- Certified
- 2023-06-20
Frequently asked questions
- What is Robert Grillo's NPI number?
- Robert Grillo's National Provider Identifier (NPI) is 1770565566, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Grillo's specialty?
- Robert Grillo is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Grillo located?
- Robert Grillo's practice location on file with NPPES is 1 Wahoo Ave, Groton, CT 06349-2324.
- What is Robert Grillo's phone number?
- The practice phone number listed in the NPPES registry for Robert Grillo is (860) 694-4966.
- Does Robert Grillo accept Medicare?
- Robert Grillo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Grillo's NPI active?
- Yes — Robert Grillo's NPI (1770565566) is active in the NPPES registry as of the last update on 2023-06-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.