Marieliz Alonso Calderon, M.D.
NPI 1295990018 · Geriatric Psychiatry Physician · Fairfax, VA
Enrolled with Medicare as Practitioner - Geriatric Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marieliz Alonso Calderon, M.D. is a Geriatric Psychiatry Physician provider in Fairfax, VA (NPI 1295990018).
Provider details
- NPI number
- 1295990018
- Entity type
- Individual
- Primary specialty
- Geriatric Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 268925 (NY)
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 tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
671 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 | 629 | $140 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 42 | $208 |
Typical Medicare-allowed amounts for these services range $140–$208 (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 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 141 | 39 |
| Quetiapine Fumarate | 139 | 22 |
| Sertraline Hcl | 123 | 29 |
| Clonazepam | 119 | 20 |
| Fluoxetine Hcl | 115 | 20 |
| Buspirone Hcl | 114 | 30 |
| Aripiprazole | 109 |
Practice location
Mailing address
Additional practice locations (2)
- 234 E 149th StBronx, NY 10451-5504Phone: (718) 579-5779
- 8500 Executive Park Ave Ste 202Fairfax, VA 22031-2253Phone: (703) 852-7020Fax: (703) 289-4612
Registry dates
- Enumerated
- 2008-07-21
- Last updated
- 2024-03-11
- Certified
- 2024-03-11
Frequently asked questions
- What is Marieliz Alonso Calderon's NPI number?
- Marieliz Alonso Calderon's National Provider Identifier (NPI) is 1295990018, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marieliz Alonso Calderon's specialty?
- Marieliz Alonso Calderon is listed in the NPPES registry with a primary specialty of Geriatric Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Marieliz Alonso Calderon located?
- Marieliz Alonso Calderon's practice location on file with NPPES is 8221 Willow Oaks Corporate Dr, Fairfax, VA 22031-4512.
- What is Marieliz Alonso Calderon's phone number?
- The practice phone number listed in the NPPES registry for Marieliz Alonso Calderon is (703) 289-7599.
- Does Marieliz Alonso Calderon accept Medicare?
- Marieliz Alonso Calderon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marieliz Alonso Calderon's NPI active?
- Yes — Marieliz Alonso Calderon's NPI (1295990018) is active in the NPPES registry as of the last update on 2024-03-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.