Tiffany Diament, M.D.
NPI 1487997128 · Psychiatry Physician · Valencia, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tiffany Diament, M.D. is a Psychiatry Physician provider in Valencia, CA (NPI 1487997128).
Provider details
- NPI number
- 1487997128
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A134062 (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
13 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
86 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 | 43 | $137 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 27 | $192 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 16 | $94 |
Typical Medicare-allowed amounts for these services range $94–$192 (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 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 74 | — |
| Sertraline Hcl | 61 | 12 |
| Lurasidone Hcl | 48 | — |
| Fluoxetine Hcl | 47 | — |
| Gabapentin | 44 | — |
| Buspirone Hcl | 43 | — |
| Risperidone | 43 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-04-01
- Last updated
- 2020-11-18
- Certified
- 2020-11-18
Frequently asked questions
- What is Tiffany Diament's NPI number?
- Tiffany Diament's National Provider Identifier (NPI) is 1487997128, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tiffany Diament's specialty?
- Tiffany Diament is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Tiffany Diament located?
- Tiffany Diament's practice location on file with NPPES is 23501 Cinema Dr Ste 200, Valencia, CA 91355-5430.
- What is Tiffany Diament's phone number?
- The practice phone number listed in the NPPES registry for Tiffany Diament is (661) 288-4800.
- Does Tiffany Diament accept Medicare?
- Tiffany Diament is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tiffany Diament's NPI active?
- Yes — Tiffany Diament's NPI (1487997128) is active in the NPPES registry as of the last update on 2020-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.