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Edit this profileWhere to find Chinenyenwa Onyemaechi, MD
- Hillsboro location main office
335 Se 8Th Ave, Hillsboro, OR 97123 - Lancaster location
555 N Duke St, Lancaster, PA 17602 - Portland location
1225 NE 2nd Ave, Portland, OR 97232
About Dr. Onyemaechi
Based in Hillsboro, OR, Chinenyenwa Onyemaechi, MD is listed in the NPI registry under psychiatry. According to Medicare claims data, the services billed most often include psychiatric diagnostic evaluation with medical services. NPI 1396087052 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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
- (503) 681-1919
- Email not available
Practice Locations
335 SE 8TH AVE
Hillsboro, OR 97123
555 N Duke St
Lancaster, PA 17602
1225 NE 2nd Ave
Portland, OR 97232
Conditions Commonly Evaluated or Treated
Within Psychiatry generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Anxiety, trauma, and obsessive-compulsive
Mood disorders
Psychotic disorders
Substance-related and addictive
Addiction & Substance Use
Cognitive and adjustment
Eating Disorders
Eating, sleep, and somatic
Mood & Depression
Neurodevelopmental and behavioral
Personality and dissociative
Sleep & Wakefulness
Procedures & services
Most searched procedures
- Anxiety and depression treatment
- Cognitive behavioral therapy
- Medication management
- Psychiatric evaluation
- Telepsychiatry
Assessment
Addiction care
Addiction Medicine
Assessments
Brain stimulation
Consultations
Diagnostics
Inpatient care
Interventional psychiatry
Psychotherapy
Sleep Medicine
Specialized care
Therapy
Therapy and care
Procedures Most Often Billed to Medicare
11 services · 11 patients · 1 distinct code
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Psychiatric diagnostic evaluation with medical services | Treatment | 90792 |
11 | Less often than most peers in Psychiatry |
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 psychiatrists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 31 related providers in 4 groups
Other psychiatrists in Hillsboro 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2013 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Psychiatric diagnostic evaluation with medical services 8
Providers in OR who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Onyemaechi?
Dr. Onyemaechi is a psychiatrist in Hillsboro, OR. That is the designation recorded for this NPI in the federal registry, where it is listed as “Psychiatry”.
NPI registry
What is Dr. Onyemaechi's address?
Dr. Onyemaechi is listed at 335 Se 8Th Ave, Hillsboro, OR 97123. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Onyemaechi?
The number on file is (503) 681-1919. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Onyemaechi's NPI number?
Dr. Onyemaechi's National Provider Identifier is 1396087052. 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
Where did Dr. Onyemaechi train?
Dr. Onyemaechi attended Other, graduating in 2013. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Onyemaechi been practicing?
Dr. Onyemaechi has 13 years experience. Calculated from a graduation year of 2013, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Onyemaechi perform?
According to Medicare billing data, Dr. Onyemaechi provides treatments such as psychiatric diagnostic evaluation with medical services. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Onyemaechi confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Onyemaechi. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.