Mason Chacko, M.D.
NPI 1932417706 · Psychiatry Physician · Stony Brook, NY
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mason Chacko, M.D. is a Psychiatry Physician provider in Stony Brook, NY (NPI 1932417706).
Provider details
- NPI number
- 1932417706
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 258527 (NY)
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
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
768 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 492 | $91 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 247 | $191 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 15 | $72 |
| Psychiatric Services Complicated By Communication Factor90785 | 14 | $15 |
Typical Medicare-allowed amounts for these services range $15–$191 (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.
Practice location
Mailing address
Additional practice locations (1)
- 301 E Main StBay Shore, NY 11706-8408Phone: (631) 968-3000
Registry dates
- Enumerated
- 2010-09-15
- Last updated
- 2020-02-05
- Certified
- 2020-02-05
Frequently asked questions
- What is Mason Chacko's NPI number?
- Mason Chacko's National Provider Identifier (NPI) is 1932417706, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mason Chacko's specialty?
- Mason Chacko is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Mason Chacko located?
- Mason Chacko's practice location on file with NPPES is 101 Nicolls Rd, Stony Brook, NY 11794-8408.
- What is Mason Chacko's phone number?
- The practice phone number listed in the NPPES registry for Mason Chacko is (631) 444-3604.
- Does Mason Chacko accept Medicare?
- Mason Chacko is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mason Chacko's NPI active?
- Yes — Mason Chacko's NPI (1932417706) is active in the NPPES registry as of the last update on 2020-02-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.