Physician Profile
Marissa Defreese, MD
Unclaimed ProfileAbout Dr. Defreese
Marissa Defreese, MD is a healthcare provider in Stamford, CT specializing in surgical critical care. Marissa is also listed as specializing in surgery. According to Medicare claims data, Marissa cared for 469 Medicare patients across 558 services. The services billed most often include critical care, first 30-74 minutes, subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, and initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (203) 276-5959
- Email not available
Practice Locations
29 HOSPITAL PLAZA 6TH FLOOR
Stamford, CT 06902
Procedures Most Often Billed to Medicare
558 services · 469 patients · 9 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Emergent insertion of breathing tube into windpipe using an endoscope | Procedure | 31500 |
12 | Too few peers to compare |
| Critical care, first 30-74 minutes | Office visit | 99291 |
218 | More than most peers in Surgical Critical Care |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
109 | More often than most peers in Surgical Critical Care |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
87 | More than most peers in Surgical Critical Care |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
59 | More often than most peers in Surgical Critical Care |
| Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | Office visit | 99231 |
32 | As often as other peers in Surgical Critical Care |
| Emergency department visit with low level of medical decision making | Office visit | 99283 |
18 | As often as other peers in Surgical Critical Care |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
12 | Less often than most peers in Surgical Critical Care |
| Emergency department visit with moderate level of medical decision making | Office visit | 99284 |
11 | Less often than most peers in Surgical Critical Care |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other surgical critical cares at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other surgical critical cares in Stamford 2
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2003 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Emergent insertion of breathing tube into windpipe using an endoscope 8
Providers in CT who bill this service to Medicare most often.
Common questions
What is Dr. Defreese's specialty?
Dr. Defreese is a surgical critical care in Stamford, CT. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Dr. Defreese?
Dr. Defreese is listed at 29 Hospital Plaza 6Th Floor, Stamford, CT 06902. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Defreese?
The number on file is (203) 276-5959. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Defreese's NPI number?
Dr. Defreese's National Provider Identifier is 1194963462. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Defreese's medical education?
Dr. Defreese attended Other, graduating in 2003. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Defreese been practicing?
Dr. Defreese has 23 years experience. Calculated from a graduation year of 2003, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Defreese known for?
According to Medicare billing data, Dr. Defreese performs procedures including emergent insertion of breathing tube into windpipe using an endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Defreese confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Defreese. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.