Naiyar Zaman, MD MHA
NPI 1558383380 · Psychiatry Physician · Fairfield, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Naiyar Zaman, MD MHA is a Psychiatry Physician provider in Fairfield, CA (NPI 1558383380).
Provider details
- NPI number
- 1558383380
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD MHA
- Sex
- Male
- Sole proprietor
- No
- License
- A89682 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Sertraline Hcl | 25 |
| Trazodone Hcl | 23 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 22 |
| Aripiprazole | 19 |
| Lamotrigine | 17 |
| Paliperidone Palmitatebrand: Invega Sustenna | 15 |
| Duloxetine Hcl | 13 |
| Gabapentin | 13 |
| Escitalopram Oxalate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-24
- Last updated
- 2024-03-21
- Certified
- 2023-09-22
Frequently asked questions
- What is Naiyar Zaman's NPI number?
- Naiyar Zaman's National Provider Identifier (NPI) is 1558383380, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Naiyar Zaman's specialty?
- Naiyar Zaman is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Naiyar Zaman located?
- Naiyar Zaman's practice location on file with NPPES is 520 Chadbourne Rd, Fairfield, CA 94534-9656.
- What is Naiyar Zaman's phone number?
- The practice phone number listed in the NPPES registry for Naiyar Zaman is (707) 366-3600.
- Does Naiyar Zaman accept Medicare?
- Naiyar Zaman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Naiyar Zaman's NPI active?
- Yes — Naiyar Zaman's NPI (1558383380) is active in the NPPES registry as of the last update on 2024-03-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.