Maria Ongsiako, M.D.
NPI 1639262975 · Psychiatry Physician · Manalapan, NJ
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Ongsiako, M.D. is a Psychiatry Physician provider in Manalapan, NJ (NPI 1639262975).
Provider details
- NPI number
- 1639262975
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 25MA05392400 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1,083 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 584 | $83 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 316 | $72 |
| Psychotherapy With Evaluation and Management Visit, 45 Minutes90836 | 84 | $94 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 75 | $113 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 24 | $199 |
Typical Medicare-allowed amounts for these services range $72–$199 (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 · 30 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Alprazolam | 269 | 45 |
| Escitalopram Oxalate | 221 | 48 |
| Clonazepam | 197 | 28 |
| Fluoxetine Hcl | 169 | 32 |
| Lorazepam | 167 | 42 |
| Trazodone Hcl | 167 | 43 |
| Duloxetine Hcl | 142 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-01
- Last updated
- 2011-11-20
Frequently asked questions
- What is Maria Ongsiako's NPI number?
- Maria Ongsiako's National Provider Identifier (NPI) is 1639262975, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Ongsiako's specialty?
- Maria Ongsiako is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Maria Ongsiako located?
- Maria Ongsiako's practice location on file with NPPES is 420 Bridge Plaza Dr # a, Manalapan, NJ 07726-1735.
- What is Maria Ongsiako's phone number?
- The practice phone number listed in the NPPES registry for Maria Ongsiako is (732) 617-2222.
- Does Maria Ongsiako accept Medicare?
- Maria Ongsiako is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Ongsiako's NPI active?
- Yes — Maria Ongsiako's NPI (1639262975) is active in the NPPES registry as of the last update on 2011-11-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.