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DR. TIFFANY MELISSA DIAMENT M.D.
NPI 1487997128
Psychiatry & Neurology - Psychiatry in Valencia, CA

Active since April 01, 2013PECOS EnrolledAccepts Medicare Assignment
23501 CINEMA DR STE 200, VALENCIA, CA 91355(661) 288-4800 Get Directions Write a Review

NPPES record last updated: November 18, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 18, 2020, Aug 23, 2017 (2 updates tracked since 2017).

About Dr. Tiffany Melissa Diament M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. TIFFANY MELISSA DIAMENT M.D. (NPI 1487997128) is an individual psychiatry provider in Valencia, California, licensed in California (A134062) and active in the NPI registry since April 2013. She is enrolled in Medicare PECOS and is a graduate of University Of California, Irvine, California College Of Medicine (2013).

NPPES Registry Identity

NPI1487997128
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameDR. TIFFANY MELISSA DIAMENTCredential: M.D.
Location Address23501 CINEMA DR STE 200Valencia, CA 91355-5430
Mailing Address23501 Cinema Dr Ste 200Valencia, CA 91355-5430 · (661) 288-4800
Phone(661) 288-4800
Sole ProprietorNo
Medical School CMSUniversity Of California, Irvine, California College Of MedicineGraduated 2013
Enumeration DateApril 1, 2013
Last NPPES UpdateNovember 18, 20202 updates tracked since enumeration
NPPES CertifiedNovember 18, 2020
✔ NPI 1487997128 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in CA · A134062
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
23501 CINEMA DR STE 200, Valencia, CA 91355
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Other Names 1

Former Name (1)Miss Tiffany Melissa Dean

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Tiffany Melissa Diament M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8224348057
PECOS Enrollment IDI20151106002296
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Tiffany Diament reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Los Angeles County Department Of Mental Health
Same address
Mental Health (Including Community Mental Health Center)
23501 CINEMA DR STE 200
Valencia, CA 91355
  • Reassigned Medicare billing, California enrollment
  • 533 clinicians in this Medicare group
NPI 1790718112 (661) 288-4800
County Of Los Angeles Auditor Controller
8.7 mi
General Acute Care Hospital
14445 OLIVE VIEW DR
Sylmar, CA 91342
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: County Of Los Angeles
  • 1,939 clinicians in this Medicare group
NPI 1134159320 (818) 364-3031

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
43 services25 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
27 services19 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
16 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91355 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$187.60 typical visit price
range $62.96 – $187.60
Typical copayment $46.90 (range $15.74 – $46.90)
Most-billed visit code 99205
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

AMBER NOEMI CORDERO CASTILLO
Student in an Organized Health Care Education/Training Program
23501 CINEMA DR STE 200
SANTA CLARITA, CA 91355
Los Angeles County (661) 288-4800
WENDY MEJIA
Social Worker (Clinical)
23501 CINEMA DR STE 200
VALENCIA, CA 91355
Los Angeles County (661) 288-4800
LYDIA MADELEINE NELSON MD
Psychiatry & Neurology (Psychiatry)
23501 CINEMA DR STE 200
VALENCIA, CA 91355
Los Angeles County (661) 288-4800
MONICA ALEXANDRA ESCALANTE RN
Registered Nurse (Psychiatric/Mental Health)
23501 CINEMA DR STE 200
VALENCIA, CA 91355
Los Angeles County (661) 288-4800
NOEMY PEREZ
Case Manager/Care Coordinator
23501 CINEMA DR STE 200
VALENCIA, CA 91355
Los Angeles County (661) 288-4800
ALEXANDRA ADAME
Social Worker (Clinical)
23501 CINEMA DR STE 200
VALENCIA, CA 91355
Los Angeles County (661) 288-4800
MR. CHRIS ROBERT LONG
Day Training/Habilitation Specialist
23501 CINEMA DR STE 200
VALENCIA, CA 91355
Los Angeles County (661) 288-4800
NOAH KULALA
Social Worker (Clinical)
23501 CINEMA DR STE 200
VALENCIA, CA 91355
Los Angeles County (661) 288-4837

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Tiffany Diament's NPI number?

The NPI number for Tiffany Diament is 1487997128. It was assigned to this individual provider in the NPPES registry on April 1, 2013. The provider is also known as Miss Tiffany Melissa Dean.

Where is Tiffany Diament located?

Tiffany Diament practices at 23501 Cinema Dr Ste 200, Valencia, CA 91355. The listed phone number is (661) 288-4800.

What is Tiffany Diament's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Tiffany Diament enrolled in Medicare?

Yes. Tiffany Diament is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Tiffany Diament's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Tiffany Diament reassigns Medicare benefits to 2 organizations: Los Angeles County Department Of Mental Health (Valencia, CA) and County Of Los Angeles Auditor Controller (Sylmar, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Tiffany Diament's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Tiffany Diament was last updated on November 18, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.