Jill Williams, MD
NPI 1366542565 · Psychiatry Physician · Piscataway, NJ
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jill Williams, MD is a Psychiatry Physician provider in Piscataway, NJ (NPI 1366542565).
Provider details
- NPI number
- 1366542565
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- MA65470 (NJ)
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
19 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
154 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 72 | $94 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 67 | $130 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 15 | $62 |
Typical Medicare-allowed amounts for these services range $62–$130 (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 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 62 | 12 |
| Buprenorphine Hcl/Naloxone Hclbrand: Buprenorphine-Naloxone | 43 | — |
| Lamotrigine | 43 | — |
| Bupropion Hclbrand: Bupropion Xl | 29 | — |
| Duloxetine Hcl | 28 | — |
| Sertraline Hcl | 28 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-25
- Last updated
- 2011-08-04
Frequently asked questions
- What is Jill Williams's NPI number?
- Jill Williams's National Provider Identifier (NPI) is 1366542565, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jill Williams's specialty?
- Jill Williams is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Jill Williams located?
- Jill Williams's practice location on file with NPPES is 671 Hoes Ln, Piscataway, NJ 08854-5627.
- What is Jill Williams's phone number?
- The practice phone number listed in the NPPES registry for Jill Williams is (732) 235-4341.
- Does Jill Williams accept Medicare?
- Jill Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jill Williams's NPI active?
- Yes — Jill Williams's NPI (1366542565) is active in the NPPES registry as of the last update on 2011-08-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.