Martin Williams, MD
NPI 1669420733 · Psychiatry Physician · Smithfield, NC
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Martin Williams, MD is a Psychiatry Physician provider in Smithfield, NC (NPI 1669420733).
Provider details
- NPI number
- 1669420733
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 39715 (NC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
425 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 213 | $81 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 116 | $114 |
| Assessment of Emotional Or Behavioral Problems96127 | 96 | $4 |
Typical Medicare-allowed amounts for these services range $4–$114 (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 · 75 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 533 | 88 |
| Clonazepam | 532 | 76 |
| Quetiapine Fumarate | 529 | 83 |
| Alprazolam | 317 | 43 |
| Duloxetine Hcl | 281 | 52 |
| Buspirone Hcl | 276 | 54 |
| Lamotrigine | 276 | 45 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$47 across 3 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
- 2006-05-04
- Last updated
- 2025-09-24
- Certified
- 2025-09-24
Frequently asked questions
- What is Martin Williams's NPI number?
- Martin Williams's National Provider Identifier (NPI) is 1669420733, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Martin Williams's specialty?
- Martin Williams is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Martin Williams located?
- Martin Williams's practice location on file with NPPES is 521 N Brightleaf Blvd, Smithfield, NC 27577-4407.
- What is Martin Williams's phone number?
- The practice phone number listed in the NPPES registry for Martin Williams is (252) 399-2112.
- Does Martin Williams accept Medicare?
- Martin Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Martin Williams's NPI active?
- Yes — Martin Williams's NPI (1669420733) is active in the NPPES registry as of the last update on 2025-09-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.