Ellen Machikawa, M.D.
NPI 1902007552 · Psychiatry Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ellen Machikawa, M.D. is a Psychiatry Physician provider in Los Angeles, CA (NPI 1902007552).
Provider details
- NPI number
- 1902007552
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A60726 (CA)
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
132 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) |
|---|---|---|
| Residence Visit for Established Patient With Low Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99348 | 62 | $80 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 30 | $114 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 23 | $114 |
| Residence Visit for Established Patient With Straightforward Medical Decision Making, Per Day, If Using Time, at Least 15 Minutes99347 | 17 | $47 |
Typical Medicare-allowed amounts for these services range $47–$114 (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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Escitalopram Oxalate | 127 | 16 |
| Quetiapine Fumarate | 90 | 15 |
| Lorazepam | 50 | 12 |
| Mirtazapine | 49 | — |
| Duloxetine Hcl | 41 | — |
| Buspirone Hcl | 31 | — |
| Trazodone Hcl | 27 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-30
- Last updated
- 2012-01-28
Frequently asked questions
- What is Ellen Machikawa's NPI number?
- Ellen Machikawa's National Provider Identifier (NPI) is 1902007552, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ellen Machikawa's specialty?
- Ellen Machikawa is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Ellen Machikawa located?
- Ellen Machikawa's practice location on file with NPPES is 573 S Boyle Ave, Los Angeles, CA 90033-3816.
- What is Ellen Machikawa's phone number?
- The practice phone number listed in the NPPES registry for Ellen Machikawa is (323) 268-3655.
- Does Ellen Machikawa accept Medicare?
- Ellen Machikawa is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ellen Machikawa's NPI active?
- Yes — Ellen Machikawa's NPI (1902007552) is active in the NPPES registry as of the last update on 2012-01-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.