Shilpa Diwan, M.D, M.P.H
NPI 1942457999 · Psychiatry Physician · Irvine, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Shilpa Diwan, M.D, M.P.H is a Psychiatry Physician provider in Irvine, CA (NPI 1942457999).
Provider details
- NPI number
- 1942457999
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D, M.P.H
- Sex
- Female
- Sole proprietor
- No
- License
- C134348 (CA)
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 tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,249 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 644 | $138 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 447 | $75 |
| Psychiatric Services Complicated By Communication Factor90785 | 63 | $15 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 42 | $234 |
| Psychotherapy With Evaluation and Management Visit, 45 Minutes90836 | 40 | $95 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 13 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sertraline Hcl | 185 | 43 |
| Mirtazapine | 145 | 27 |
| Trazodone Hcl | 111 | 36 |
| Duloxetine Hcl | 104 | 24 |
| Bupropion Hclbrand: Bupropion Xl | 100 | 27 |
| Escitalopram Oxalate | 86 | 24 |
| Clonazepam |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$443 across 21 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-08-21
- Last updated
- 2020-06-04
- Certified
- 2020-06-04
Frequently asked questions
- What is Shilpa Diwan's NPI number?
- Shilpa Diwan's National Provider Identifier (NPI) is 1942457999, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Shilpa Diwan's specialty?
- Shilpa Diwan is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Shilpa Diwan located?
- Shilpa Diwan's practice location on file with NPPES is 19772 Macarthur Blvd Ste 220, Irvine, CA 92612-2405.
- What is Shilpa Diwan's phone number?
- The practice phone number listed in the NPPES registry for Shilpa Diwan is (949) 304-6727.
- Does Shilpa Diwan accept Medicare?
- Shilpa Diwan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Shilpa Diwan's NPI active?
- Yes — Shilpa Diwan's NPI (1942457999) is active in the NPPES registry as of the last update on 2020-06-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.