Marcus Tjia, MD
NPI 1376605089 · Psychiatry Physician · Wellesley, MA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marcus Tjia, MD is a Psychiatry Physician provider in Wellesley, MA (NPI 1376605089).
Provider details
- NPI number
- 1376605089
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 230945 (MA)
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
1,156 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 537 | $138 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 319 | $76 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 155 | $17 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 58 | $99 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 31 | $9 |
| Psychotherapy, 30 Minutes90832 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-16
- Last updated
- 2021-03-08
- Certified
- 2021-03-08
Frequently asked questions
- What is Marcus Tjia's NPI number?
- Marcus Tjia's National Provider Identifier (NPI) is 1376605089, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcus Tjia's specialty?
- Marcus Tjia is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Marcus Tjia located?
- Marcus Tjia's practice location on file with NPPES is 230 Worcester St, Wellesley, MA 02481-5420.
- What is Marcus Tjia's phone number?
- The practice phone number listed in the NPPES registry for Marcus Tjia is (781) 431-5270.
- Does Marcus Tjia accept Medicare?
- Marcus Tjia is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marcus Tjia's NPI active?
- Yes — Marcus Tjia's NPI (1376605089) is active in the NPPES registry as of the last update on 2021-03-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.