Chasen Greig, M.D.
NPI 1649513466 · Surgery Physician · Hartford, CT
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chasen Greig, M.D. is a Surgery Physician provider in Hartford, CT (NPI 1649513466).
Provider details
- NPI number
- 1649513466
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
248 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 105 | $80 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 64 | $176 |
| Critical Care, First 30-74 Minutes99291 | 53 | $217 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 14 | $178 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 12 | $134 |
Typical Medicare-allowed amounts for these services range $80–$217 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$102 across 2 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)
- 333 City Blvd West Ste 1600Orange, CA 92868Phone: (714) 456-7890
- 759 Chestnut StSpringfield, MA 01199-1001Phone: (413) 794-0000
Registry dates
- Enumerated
- 2013-03-29
- Last updated
- 2021-07-16
- Certified
- 2021-07-16
Frequently asked questions
- What is Chasen Greig's NPI number?
- Chasen Greig's National Provider Identifier (NPI) is 1649513466, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chasen Greig's specialty?
- Chasen Greig is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Chasen Greig located?
- Chasen Greig's practice location on file with NPPES is 114 Woodland St, Hartford, CT 06105-1208.
- What is Chasen Greig's phone number?
- The practice phone number listed in the NPPES registry for Chasen Greig is (860) 714-5237.
- Does Chasen Greig accept Medicare?
- Chasen Greig is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chasen Greig's NPI active?
- Yes — Chasen Greig's NPI (1649513466) is active in the NPPES registry as of the last update on 2021-07-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.